The filled-grain per panicle exhibited a high estimate of PCV and GCV, followed by the effective tiller and filled grain percentage. However, both high biological yield and high harvest index should be taken into account together in this selection due to their negative correlations and indirect effects each other. These traits may also be utilised for pure line selection in late generations. The first three principal components explained about 79.05% of the total variation The preference, choice, and the economy of rice (Oryza sativa L.) largely depend on its physicochemical and cooking properties, which are found to be superior for landraces than modern varieties. To produce a new variety that is superior in terms of production and benefits, one of the information needed is agronomic and morphological character knowledge, which is very necessary to determine the kinship between varieties used as a basis for determining the parent in plant breeding. O. sativa, as they often lack clear distinguishing morphological characteristics (Vaughan & Morishima 2003). Genetic variability studies on yield and yield related parameters had confirmed the existence of high genetic variation and possibility of improvement of yield related traits based on genetic parameters like Genotypic Coefficient of Variation, Heritability and Genetic Advance. Among the qualitative traits variation was found to be high for leaf blade colour, leaf blade pubescence, ligule shape, panicle shattering, leaf senescence and sterile lemma colour. The experiments were laid out in a Randomized Complete Block Design (RCBD) with three replications. Thus, the present study can be utilized for further rice improvement programs and can also be used for assessing genetic diversity among morphologically distinguishable rice landraces. L-1, 2, 5, 6, 17, 18, 28, 34, 36, 42, 50, 51, 52, 53, 54, 55, 61, 62, 63 and 64. Analysis of variance revealed that existence of significant variation among accessions for all the quantitative traits. The most prominent production problems as perceived by the farmers are lack of technical know-how, lack of irrigation, lack of organized credit facilities, and lack of quality inputs at the time of need. L-2, 5, 7, 9, 10, 11, 12, 13, 14, 15, 16, 18, 19, 21, 23, 24, 26, 27, 28, L-4, 6, 8, 20, 22, 25, 29, 35, 36, 37, 43, 45, 47, 52 and 54, L-1, 9, 15, 18, 21, 22, 25, 26, 29, 34, 37, 50, 52 and. panicle. According to the magnitude of the direct effects on grain yield. Pusa Sugandha one of the most promising one showed maximum plant height at maturity, no. These are categorised into three basic types: granulose, spinulose and insular. The improvement in grain yield will be efficient, if the selection is based on the biological yield, the harvest index, the number of productive tillers per square metre and the number of filled grains per panicle under temperate conditions. Obviously land races are disappeared fast. 49, 50, 51, 52, 57, 58, 59, 60, 61 and 62. Table 1. Environmental influence was meagre on expression of characters as evidenced by narrow gap between GCV and PCV for most of the characters. The first and second principal components were mostly related with the physical and chemical characteristics while the third and fourth principal components were concerned with cooking characters. of genitors for rice plant breeding programs. Phenotypic variances for the traits under study were higher than genotypic variances in the seasons suggesting that the traits were more responsive to environmental influence. Zafar N, Aziz S, and Masood SH. Morphological Characterization of Traditional Rice Genotype. A wide variation of grain characters, like gain size and shape, anthocyanin colouration of lemma-palea and us, the result from this study along with the result of Pokhrel et al. L-4, 20, 28, 40, 43, 34, 32, 47, 50, 51, 53, 55, 59, 61 and 63. for improvement of agronomic, nutritional, Table 3 Mean values of yield and its component characters, would be suitable for registration as farmers variet. divergence of sixteen qualitative characters and sixteen quantitative characters. L-1, 2, 3, 4, 5, 6, 7, 8, 17, 36, 37, 47, 45 and 51. Although most of them were of medium grain type, their 1000 kernel weight varied between 12.62 g and 25.65 g. From the observed chemical properties, Pahelo Anadi (9:73 ± 0:55mm) showed the highest gel consistency and lowest apparent amylose content (7:23 ± 0:36%). polymorphic except coleoptiles colour, present of leaf collar, shape of ligule and present of secondary branching in Oryza sativa contains two major subspecies: the sticky, short-grained japonica or sinica variety, and the nonsticky, long-grained indica rice [] variety. Shobha R N, Shobha Rao L V, Viraktamath B C and Mishra B. L-7, 20, 25, 34, 35, 37, 38, 41, 43, 50, 51, 52 and 53. Institute of Agriculture and Animal Science, Multivariate Analysis of Phenotypic Diversity of Rice (Oryza sativa L.) Landraces from Lamjung and Tanahun Districts, Nepal, Evaluation of Physicochemical and Cooking Characteristics of Rice ( Oryza sativa L.) Landraces of Lamjung and Tanahun Districts, Nepal, Variability And Heritability Estimate of 30 Rice Landraces of Lamjung and Tanahun Districts, Nepal, Evaluation of Qualitative and Quantitative Traits and Correlation Coefficient Analysis of Six Upland Rice Varieties, Climate Change and Its Impact on the Yield of Major Food Crops: Evidence from Pakistan, Genetic Divergence in Landraces of Bangladesh Rice (Oryza sativa L.), Genetic variability and correlation of some morphometric traits with grain yield in bold grained rice (Oryza sativa L.) gene pool of Barak valley, Characterization and assessment of variability in upland rice collections, Production Economics of Rice in Different Development Regions of Nepal, ASSESSMENT OF GENETIC VARIABILITY CHARACTER ASSOCIATION AND PATH COEFFICIENT FOR YIELD AND ITS COMPONENT CHARACTERS IN RICE, Potential loss of rice landraces from a Terai community in Nepal: A case study from Kachorwa, Bara, Morphologybased multivariate analysis of phenotypic diversity of landraces of rice (Oryza sativa L.) of Bankura district of West Bengal, Correlation and path coefficient analysis for some yield-related traits in rice (Oryza Sativa L.) under thrace conditions, Undergraduate Practicum Assessment (Maize Breeding). Maximum inter cluster D distance was observed between cluster, Sixty four landraces were evaluated for 10 yield and its component traits. 34, 43, 55, 56, 58, 59, 60, 61, 62, 63, 64 and L-, L-7, 8, 9, 10, 12, 13, 14, 15, 16, 17, 18, 22, 26, 28, 2, 46, 47, 48, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 61, 62, 63, 64 and L-. And these genotypes can also be used in crop indica Kato) were collected from different ecological niches. Presently more than 70% of rice cultivation is being done using high yielding variety only. There are 5,556 rice varieties were recorded in the year 1975 from this state. Professors Amit Khanal, Mahesh Jaishi, Kapil, us with valuable landraces as research materia, urce/statistical-information-nepalese-agricul-, Characterization and assessment of variabil, ... e intracluster distance is due to the heterogeneous nature of the landrace within a cluster. 52, 53, 55, 56, 57, 59, 60, 61, 62, 63 and 64. Most of the landraces (93%), because awns are objectionable in threshing and, (23%), strong (10%) and weak (3%). But most of the modern high yielding varieties are medium and fine grained. L-2, 9, 10, 12, 14, 15, 16, 19, 22, 23, 24, 25, 27, 30, 31, 32, 39, 40, 41, 42, 44, 55, 56, 57, 58, 59, 60 and L-. Some of the landraces like Rato Masino, Thakali Lahare Marsi, Biramful, and Lekali Marsi from Lamjung and Tanahun districts were found to be promising landraces for yield and yield attributing traits, The aim of this project is to characterize the local landraces of rice from Lamjung and Tanahun districts of Nepal. February 2020 Annals of Plant Sciences 9(2):3731-3741 The results of PCA suggested that characters such as leaf length, leaf width, panicle length and grain size (100 grain weight, length and width of grain and kernel) were the principal discriminatory characteristics of landraces of rice. 47, 48, 49 50, 51, 52, 53, 54, 55, 59, 60, 61, 62, 63 and 64. The paper presents an image-based paddy plant variety recognition system to recognize 15 different paddy plant varieties using 18 color-related agromorphological characteristics. Search Google Scholar for this author, Sumer Pal Singh. Needless to mention, the land races are valuable as they possess treasure of genetic material which may prove valuable in future crop development and improvement programs. Annually approximate 1.1 million tons of rice is being produced and on the basis of production it occupies second position in the world. The experiment was laid out at CPGS Campus, Umiam, Meghalaya in a randomized block design with three replications during kharif season, 2017. improvement event in terms of both quality traits and high yield even as source or breeding material for pest and disease 2. agro-morphological characters. The result showed that the highest milling recovery was found in Indrabeli (75.55%) whereas the lowest was found in Kalo Masino (66.98%) and bulk density ranged from 0.81 g/cm3 to 0.88 g/cm3 showing not much variability. The maximum distance was observed between CAUS122 and CAUS110 and minimum distance was observed between CAUS120 AND CAUS106. Journal of Agriculture and Veterinary Sciences 4: 35-40. Characterization has confirmed the existence of Distinctness, uniqueness and stability for the traits studied as given in the guidelines. Clustering analysis led to the grouping of lines in to 2 major groups. Path coefficient analysis revealed highest direct effect on grain yield for number of grains per panicles and 1000 grains weight. enticing characters such as, Rice landraces of hilly zone of Karnataka were characterized for distinctness and uniformity according to DUS test guidelines of PPV & FR authority. 27, 28, 29, 30, 31, 32, 33, 34, 35, 37 and 38. of grains per plant, spikelet fertility. Based on this study highly distinguish and high yielding traditional rice genotypes (Sanna mundaga, Kasse bai and champakali) would be suitable for registration as farmers variety and such genotypes can also be utilized in crop improvement programme in terms both quality traits and high yield even as source or breeding material for pest and disease resistance. In this study characterization of twenty landraces of rice presently available in this district was performed using DUS testing protocol. Analysis of variance indicated the existence of significant differences among genotypes for all the characters studied except leaf width and harvest index. In Nepal rapid loss of local crop varieties has ac- companied ad hoc promotion of modern varieties (MV) and changes in land use. Cluster analysis showed maximum and minimum intracluster distance in cluster VI (D2 = 35.77) and cluster I (D2 = 18.59), respectively. The present experiment was conducted on 47 bold grained rice genotypes with two locally recommended high yielding check varieties namely Ranjit and Monohar Sali of Barak Valley, Assam to assess the genetic variability, correlation and coheritability for eight morphophysiological characters. The experiment was carried out at the Instructional farm, BCKV, Nadia, West Bengal during kharif 2013 with RBD for yield attributing traits of different rice genotypes. Rice is the major food grain of India and is being cultivated on 36.95 million ha. All rights reserved. L-3, 7, 13, 19, 21, 35, 36, 53, 54, 55, 56, 63 and 64. coefficient of Jaccard. timate leaf length showed positively significant, also showed positively significant corr, panicle (TGP), Panicle length (cm) (PL), Grain Length Breadth ratio (LBR), Flag leaf length (cm) (FLL), **. Six parameters of physical properties, four parameters of chemical properties, and five parameters of cooking properties were evaluated based on the standard protocols. L-1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 44, 45, 46, 47, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63 &. tillers (r=0.437) and effective tillers (r=0.356). Agro-morphological characterization of rice (Oryza sativa L.) landraces of Lamjung and Tanahun District, Nepal. All figure content in this area was uploaded by Shishir Sharma, All content in this area was uploaded by Shishir Sharma on Feb 28, 2020. science, Tribhuvan University, Lamjung Campus, information for plant breeding programs. Join ResearchGate to find the people and research you need to help your work. Fifty five traditional rice varieties of West Bengal, mostly from the lateritic region, were investigated for grain morphological characters. 35, 36, 37, 38, 39, 40, 41, 42, 44, 45, 46, 47, 49, 51, 53, 58, 60, 61, 62. These problems need to be addressed to improve the production situation and efficiency of rice production in the country. L-1, 2, 3, 6, 7, 8, 14, 20, 23, 26, 33, 36, 40, 44, 45, 46, 47, 48, 50, 51, 52, 58. Indonesia has a high level of rice germplasm, both black rice and aromatic rice. Therefore, these characters could be used as criteria for selection of genotypes with high seed yield. related mostly to the yield, yield attributing, and grain characteristics. 53, 54, 55, 56, 57, 59, 60, 61, 62 and 64. Morphological characterisation of Italian weedy rice (Oryza sativa) populations. These characters were predominantly governed by additive gene action. improvement programme for enhancement both qualitative and quantitative traits. The present investigation was carried out to evaluate twenty four breeding line of rice with respect to performance, variability, heritability, character association and genetic, Fifty five traditional rice varieties of West Bengal, mostly from the lateritic region, were investigated for grain morphological characters. L-2, 4, 5, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 21, 22, 23, 24, 25, 26. Direct selection of characters of these traits based on phenotypic expression by a simple selection method would be more reliable for yield improvement. The results show that varietal loss is pervasive and will accelerate if no proper initiative is taken to protect them. Flag leaf, landraces had erect, 30% semi erect and 17%, landraces showed low shattering followed by, characters among 30 landraces from Lamjung. They, spacing between row to row and 20 cm between, applied in two splits, one at time of tillering and, The standard agronomic practices were adopted, for normal crop growth. Asian geographic areas as considered in Table 2. Wide difference between GCV and PCV was observed for the characters like plant height, flag leaf length, effective branch tillers per hill, panicle length, sterility percentage and yield per plant. Sterility percentage, effective branch tiller per hill and panicle length had high coheritability with grain yield suggesting that selection for these characters would improve grain yield. The present study indicated that morphological traits were useful for preliminary Pakistan is vulnerable to climate change, and extreme climatic conditions are threatening food security. 40, 61, 62, 63, and 64. Shannon and Simpson’s indices were calculated for 18 qualitative traits. 38, 43, 48, 4, 10, 25, 20, 28, 33, 37, 39, 45 49,50, 51, 52, 53, 58, 59, 60, 61. 30 rice landraces on their physicochemical and cooking characteristics which aim to promote the revival of old landraces. Indian Journal of Plant Genetic Resources. L-1, 2, 3, 4, 5, 6, 8, 7, 9, 10, 11,12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 24. 44, 45, 48 , 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63 and 64. varieties of IOSR. 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 61, 62, 63 and 64. L-3, 6, 7, 8, 9, 10, 11, 12, 14, 15, 16, 13 and 44. This project will also study the Physio-chemical and cooking characteristics of t. The project aims to identify the superior maize hybrids by estimating the genetic parameters. the order of yield components was the number of filled grain per panicle (0.297 and 0.285 > the number of productive tillers per square metre (0.233 and 0. distinguishable rice landraces. have been cultivated by farmers as well as local promoters. The first and second principal components were mostly related with the physical and chemical characteristics while the third and fourth principal components were concerned with cooking characters. with Nagina 22 as a check variety. Germplasm consist of these characters are better choice for After evaluation of 782 Variation for 9 morphological characters and constitution of axis 1 of its principal component analysis. Also, 13% of landraces possessed strong aroma while noble cooking properties were showed by Thakali Lahare Marsi with the highest elongation ratio (2:41 ± 0:05) and by Chiniya with the lowest gruel solid loss (0:033 ± 0:03%) and minimum optimum cooking time (23:45 ± 0:03 min). Agro-morphological, Oryza sativa f. spontanea , salient trends, Weedy rice. The quantum of production has increased from 0.3 million ton in 1966 to nearly 1.1million ton at present. The qualitative characters viz basal leaf sheath color, culm attitude, curvature of panicle, panicle weight and leaf senescence were highly, Rice plays a major role in feeding more than half of the world`s population with total production of about 769.9 million ... Long-type landraces are still preferred by local people like Jetho Budo, Rato Masino, Chiniya, and Jarneli and even rice with medium-grain shape like Pahelo Anadi and Rato Anadi are preferred. of hilly zone of karnataka evaluated in this study were found to be distinct and uniform with respect to DUS traits and yield characters and hence may be considered for crop improvement programme for various agronomic and quality traits. 27, 28, 29, 32, 33, 34, 36, 37, 38, 39, 41, 42, 43, 44, 47, 48, 49, 60 and 62. The k-means color clustering method has been used to segment the target regions in the paddy plant images. Twenty rice landraces collected from different ecological regions of Bangladesh were studied to assess the nature and magnitude of genetic divergence among them. In addition, the yield components had positive direct effects on grain yield. A significant amount of variation was displayed for most of the agronomical traits examined. Heritability estimate varied from 9.15% for panicle length to 99% grain yield. In this study, we assessed and evaluated milled rice of 30 rice landraces on their physicochemical and cooking characteristics which aim to promote the revival of old landraces. for the traits studied as given in the guidelines. Slight differences were observed between the Phenotypic Coefficient of Variation (PCV) and Genotypic Coefficient of Variation (GCV). The experiment was laid out in a randomized complete block design with three replications and sixteen agro-morphological characters measured on each of the experimental plots. Sumer Pal Singh. Agriculture in West Bengal is the means of livelihood of about 65% of the population of the state living in villages with over 95% as small and marginal farmers. O. sativa has persistent spikelets, O. rufipogon has deciduous spikelets and O. longistaminata is perennial with creeping and branched rhizomes (Bor, 1960; Takeoka, 1963). India is centre of origin and as per rice is concerned all together this country proudly possess 88,681 different variety of rice, out of that 55,615 are landraces, 1,171 are wild races and 32,895 are other varieties. The first three principal components explained about 86.9% of the total variation among the 12 characters. Main component analysis of morphological traits in thirty-nine accessions of rice (Oryza sativa L.) grown in a rainfed lowland ecology of Nigeria Adeyemi Anthony Kojibola Department of Crop Production, Faculty of Agricultural Science, University of Benin, Edo, Nigeria. This work aimed to evaluate the morphological of rice (Oryza sativa and Oryza glaberrima) germplasm. tonnes all over the world. Wide variation among the grain morphological. Significant variations (p < 0:05) were found in all the properties that were evaluated. Focus Group Discussions and field plot observations were employed to verify the informa- tion and draw conclusions. awned characters were apomorphic in WR eco-type populations in Sri Lanka. 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63 and 64. derived by UPGMA from 8 qualitative traits. To the west the surface gradually rises, giving way to undulating country, interspersed with rocky hillocks. Inter-cluster distances were higher than the intra-cluster distances reflecting wider genetic diversity among the genotypes of different groups. 31, 32, 33, 34, 35, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 50, 51, 52, 53. 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47. Although most of them were of medium grain type, their 1000 kernel weight varied between 12.62 g and 25.65 g. From the observed chemical properties, Pahelo Anadi (9:73 ± 0:55mm) showed the highest gel consistency and lowest apparent amylose content (7:23 ± 0:36%). Distance between cluster centroids of 30 rice landraces from Lamjung and Tanahun district. Objectives: PC1 included the traits that were Landraces from Anadi group, Jetho Budo, Jarneli, and Rato Masino performed well in PC1 while landraces such as Mansara, Pakhe Sali, and Aanga performed well in PC2. Morphological characterization of traditional rice genotypes according to DUS test guidelines, All figure content in this area was uploaded by B. M. DUSHYANTHA Kumar, All content in this area was uploaded by B. M. DUSHYANTHA Kumar on Aug 16, 2016, Research Journal of Agricultural Sciences, Morphological Characterization of Traditional R, T C Sridhar, B M Dushyantha Kumar, B R Mani* and G K Nishanth. The characters were days to 50% flowering, plant height, flag leaf length, flag leaf breadth, effective branch tillers per hill, panicle length, sterility percentage and grain yield per hill. The methods of feasible generalized least square (FGLS) and heteroscedasticity and autocorrelation (HAC) consistent standard error were employed using time series data for the period 1989 to 2015. Visual observations were recorded on five plant basis as per standard descriptors on sixteen qualitative characters viz., basal leaf sheath color, leaf auricle, leaf ligule, ligule shape, leaf collar, flag leaf: attitude of blade, leaf sheath anthocyanin colouration, leaf blade: anthocyanin, panicle secondary branch, leaf senescence, spikelet: color of tip of lemma, panicle: exsertion, panicle: awns and lemma: anthocyanin coloration of area below apex. This study tries to analyze the production situation and production efficiency of rice in different development regions of Nepal. See all articles by this author. Eleven exine surface patterns are distinguished at x 20,000 magnification under SEM. Bhanu Municipality, Tanahun (Table 1). 1971. Field experiments were conducted in 2014 and 2015 seasons at the Teaching and Research Farm, Federal University Oye, (Ikole campus) Ekiti State, Nigeria, to determine genetic variability for phenotypic traits (qualitative and quantitative) among six upland rice varieties through estimating heritability of yield and yield components, genetic advance, correlation coefficients of grain yield and yield contributing traits. Preliminary analysis of variance showed that the cultivars were significantly different ... Oryza sativa oryza sativa Subject Category: Organism Names see more details. Cheng, K.S. Grain characters showed polymorphism with respect to, hulled and non hulled grain length, width and color. 36, 39, 40, 42, 43, 47, 48, 50, 55, 57, 59, 60, 61, 62 and 64. Green revolution has considerably helped to improve production of food grains in our country and its role in achieving status of self sufficiency in food grain is beyond any doubt. L-2, 3, 7, 12, 18, 22, 24, 28, 35, 43 and L-, L-1, 2, 3, 4, 5, 6, 11, 12, 13, 14, 15, 16, 17, 18, 21. Rice is the staple food grain of West Bengal and Bankura district of this state is major producer of this grain. The characters viz., days to 50% flowering, leaf length, leaf width exhibited high heritability and panicle per plant, canopy temperature, spikelet per plant, no. The RGB, HSI and YCbCr color models have been employed to construct color feature vectors from the segmented images and the feature vectors are reduced using Principal Component Analysis (PCA) technique. The objective of the study was to assess diversity, genetic variability, heritability, genetic advance for the yield, and yield, 'e magnitude and nature of genetic divergence play a vital role in the selection of the desirable landraces for its utilization in the breeding program. Phenotypic divergence for agro-morphological traits among landrace genotypes of rice (Oryza sativa L.) from Pakistan. Landraces from Anadi group, Jetho Budo, Jarneli, and Rato Masino performed well in PC1 while landraces such as Mansara, Pakhe Sali, and Aanga performed well in PC2. Indonesian Journal of Agricultural Science. According to the results from the first year, 49 breeding lines were selected, and they and their 10 parents were tested in a randomised complete block experiment design with three replications in the same institute in 1996. e low intracluster distance indicated that the landraces in the clusters were closely related. L-5, 10, 11, 12, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 62. Thus, as MV replace local landraces the threat of genetic erosion and eventual extinction is increased. Sixty-two agro-morphological characteristics are conventionally used in the DUS test for varietal identification from paddy field crops, DUS characterization for farmer varieties of IOSR. The principal component analysis revealed that five among the thirteen principal components were significant (eigenvalue >1) and contributed to 29.96%, 20.26%, 13.56%, 11.68%, and 9.22% of the total variance, respectively. Based on D statistics, all the 64 cultivars were grouped into fourteen clusters. But high yielding varieties, which are the back bone of green revolution, have indirectly stimulated erosion of land races and wild varieties of rice. 6.2 (2004): 335-339. After the Green Revolution, the increase in the choice of modern varieties at the expense of landraces has become a major cause of varietal loss. A study was carried out with 30 rice landraces at the Institute of Agriculture and Animal Science, Lamjung The maximum value, minimum value, coefficient of variation and Pearson correlation were analyzed to study quantitative characters. Mohiuddin 1*, Shahanaz Sultana 2 and Jannatul Ferdous 2 1Department of Biotechnology and Genetic Engineering, Mawlana Bhashani Science … 1985. India is an inland to vast varieties of rice cultivars, landraces and many lesser known varieties that Cluster analysis showed maximum and minimum intracluster distance in cluster VI (D2 = 35.77) and cluster I (D2 = 18.59), respectively. 2003. Agro-morphological characters were analyzed using Multivariate statistical analysis. The benefit-cost ratio of rice production was the highest in Central Development Region indicating the most efficient production practice in the country. A study was carried out with 30 rice landraces at the Institute of Agriculture and Animal Science, Lamjung The qualitative characters viz basal leaf sheath color, culm attitude, curvature of panicle, panicle weight and leaf senescence were highly distinct across the genotypes. It is nec- essary to develop site-specific strategies to conserve local rice diversity and en- hance its use to improve the livelihoods of rural farming communities. Cultural characters of each of the isolates studied on four different solid media at room temperature 28 ºC showed the variation among the isolates of P. oryzae. Mean values of effective tiller and kernel width were found maximum in clusters V and VI, respectively. The principle morphological characteristics of the genus include rudimentary sterile lemmas, bisexual spikelets, and narrow, linear, herbaceous leaves with scabrous margins. Rice is the most important staple food crop grown in Nepal. All landraces showed significant variations (p <0.001) for all 13 qualitative traits studied. The rice landraces have been grown and consumed since time immemorial and have an important role in livelihood and food security [5]. 37, 38, 40, 41, 42, 44, 45, 47, 48, 51, 52, 53, 54, 56, 57, 58, 60, 61, 63, 64. Frequency distribution of thirty qualitative traits of collected thirty rice landraces from Tanahun and Lamjung District. The grain yield had positive and, Join ResearchGate to discover and stay up-to-date with the latest research from leading experts in, Access scientific knowledge from anywhere. © 2008-2020 ResearchGate GmbH. This analysis enabled assessment of major characters of landraces variety which have a 3731-, s negatively correlated with plant height (r= -, http://dx.doi.org/10.21746/aps.2020.9.2.3, Dr. Nitesh Chandulal Joshi, Department of Botany, Rizvi College of. Biswajit Mondal. Fig. ermplasm lines using PVC pipes under saline and normal soil condition. Cluster III showed the highest mean value for grain width, flag leaf breadth, yield, and minimum mean value for plant height while mean values of total grain per panicle, filled grain percentage, and thousand-grain weight were maximum in cluster IV. It is the staple food for half of the world’s population. for single plant yield improvement will effective for these trait. The set of six combined agro-morphological characteristics recorded during maturity growth stage has given the highest average paddy plant variety recognition accuracies of 91.20% and 86.33% using the BPNN and SVM classifiers respectively. All landraces showed significant variations (p <0.001) for all 13 qualitative traits studied. L-12, 19, 27, 58, 59, 60, 61, 62, 63 and 64. Collection, preservation and characterization of such cultivars may provide great opportunity to utilize them in crop X and XIV (2056.50) inferring, crosses between these two clusters could exploit maximum heterosis. Days to maturity contributed maximum (36.41%) towards divergence, followed by straw yield per plant (19.54%). of grains per plant, spikelet fertility, harvest index, and yield per hectare exhibited medium heritability. distinctiveness, uniformity and stability. The objective of the study was to assess diversity, genetic variability, heritability, genetic advance for the yield, and yield contributing traits of 30 landraces of rice. L-4, 11, 13, 18, 24, 27, 29, 45, 48, 51, 59, 60, 61, 62 and 63. According to Sharma et al. Significant variations (p < 0:05) were found in all the properties that were evaluated. The climatic condition adversely affects maturation and reproductive cycle of plants. quantitative morphological characters with 82 agro-morphic descriptors was carried out. A simplified assay for milled rice amylase. L-5, 17, 42, 54, 55, 56, 61, 62, 63 and 64. The ovary-derived plant (H1) populations were completely haploid, doubled haploid or haploid-doubled haploid mixture. 26, 28, 29, 30, 31, 32, 33, 34, 35, 37, 38, 39, 41, 42, 44, 45, 46, 47 and 48. 197) > 1000-grain weight (0.165 and 0.136). distinct across the genotypes. The study suggests the existence of the diversity and estimated genetic parameters among landraces of rice that can be exploited in future breeding programs. The situation is fast eroding indigenous cultivars of rice. 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 63 and 64, Morphological Characterization of Traditional Rice Gen. L-1, 4, 5, 6, 7, 8, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 22, 23, 24, 25, 26. Much of the country is covered with jungles. 54, 55, 56, 57, 58, 59, 60, 61, 62, 63 and 64. Moderate heritability associated with moderate genetic advance was recorded for the characters effective branch tillers per hill, flag leaf length and flag leaf breadth. In the principal component analysis, the first four principal components retained 73.8% of the variance. These characters could be hypothesized as derived from mixing of germplasm either of cultivated or wild rice varieties indicating the possibilities of cross-pollination among wild, cultivated and weedy rice eco-types. Based on this study highly distinguish and high yielding traditional rice genotypes (Sanna mundaga, Kasse bai and champakali) would be suitable for registration as farmers variety and such genotypes can also be utilized in crop improvement programme in terms both quality traits and high yield even as source or breeding material for pest and disease resistance. It is one of the very few crop species endowed with rich genetic diversity which account over 100,000 landraces and improved cultivars. This is mainly due to easy availability and judicious use of production inputs. 1000 grains weight exhibited strong positive direct effect on seed yield, however, it contributed negatively seed yield through number of grains per panicle. It is therefore urgent to collect agronomic and other characters of land races. The reduced color feature vectors are used as input to back propagation neural network (BPNN) and support vector machine (SVM). Western Development Region dominated all other development regions in terms of average production, marketed amount and yield. L-41, 42, 43, 44, 45, 47, 48, 49, 50 and 51. Keywords: Rice, agro-morphological traits, hierarchical clustering, path coefficient. No parallel relationship between genetic and geographical divergence was observed. Dis- tribution of local rice varietal diversity, documented through a baseline survey and Participatory Rural Appraisalcon- ducted in 1998, was critically reviewed and analyzed to assess genetic erosion of local rice diversity. In this study 480 farmers were selected randomly from 12 districts representing entire five development regions and surveyed using semi-structured questionnaire. Based on per se performance with respect to yield components, blast resistance and divergence, CAUS105, CAUS104, CAUS107, CAUS121 were identified as the best progenies that could be nominated for multilocation trials, or used as parents for further population improvement. Access scientific knowledge from anywhere. analyzed quantitative data. The higher value of the phenotypic coefficient of variation (PCV) compared to the corresponding genotypic coefficient of variation (GCV) for all the studied traits indicated the influence of the environment. 32, 34, 35, 37, 38, 39, 41, 42, 43, 53, 54,55,56,57,58,59,60,61,62, 63 and 64. Plants derived from unpollinated ovary culture of ten rice genotypes showed significant variability in agro-morphological characteristics. This indicates a strong inherent association among grain yield per plant and other morpho-physiological characters. variable pair group method of the average linkage cluster analysis (UPGMA-Person) were used to of effective tillers plant -1 , days for 1 st flowering as well as for 50% flowering, flag leaf, panicle length and moderate yield. Inheritance of botanical traits in rice (O. sativa x O.rufipogon F1 and F2 showed 89cm and 83.38cm for plant height, where as … hese landraces and suggest how these landraces can be exploited in varietal development program. This information was supplemented by the information obtained from group discussions, observations and other secondary sources. DUS characterization for farmer Email: profantonio7@uniben.edu.ng Accepted 17 … Annually approximate 120.6 million tons of rice is being produced and on the basis of production it occupies second position in the world (Food and Agriculture Statistics, 2010). L-1, 2, 3, 6, 9, 10, 15, 17, 21, 22, 26, 27, 30, 35, 36, 40, 54 and 62. The phenotypic correlations among the traits and their path coefficient were estimated in both years. The frequency distribution of qualitative characters were studied where panicle shattering, lemma & palea color, culm lodging resistance and Leaf senescence showed high variability. The genotypes under cluster IV showed highest divergence among them as it exhibited highest intra-cluster distance. Characterization has confirmed the existence of Distinctness, uniqueness and stability for the traits studied as given in the guidelines. National guidelines for the conduct of tests for distinctiveness, uniformity and stability. L-12, 13, 14, 15, 16, 17, 23, 24, 25, 30, 39 and L-, 35, 36, 36, 38, 42, 43, 44, 47, 48, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 49, 50, 51, 52, 53, 54, 55, 60, 61, 62, 63 and 64. Farmers’ plots were monitored during 3 years and changes in varietal choice were re- corded. The upland rice accessions are natural reservoir of genetic variability for various biotic and abiotic stresses. High heritability, along with a high genetic advance was found in 10 traits, including 1000 grain weight, grain length, and filled grain per panicle indicated the presence of additive gene action. For this purpose, 80 breeding lines derived from 11 different cross populations in the F6 generation and their 10 parents were tested in a randomised complete block experiment design with two replications at the Thrace Agricultural Research Institute in 1995. Department of Plant Breeding and Genetics, University of Agriculture and Horticultural Science, *University of Agricultural Sciences, Dharwad, the rice growing farmers across the Southern transitional, like Rajaboga, Rajamudi and Ratnachudi have fine, Sixty four traditional rice genotypes were considered, Table 1 List of traditional rice genotypes, anthocynin color whereas, 78.12% of genotypes had leaf, The density of pubescence on leaf w. weak 9.37% and strong in 46.87% of genotypes.
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