Vol. 7, Special Issue 6 (2019)
Assessment of genetic diversity for yield and its components traits in rice (Oryza sativa L.) landraces
Author(s): Chandan Kishore, Anil Kumar, Ravi Shankar Singh, Awadhesh Kumar Pal and Bishun Deo Prasad
Abstract: The aim of this study was to determine the nature and extent of genetic variability and diversity among twenty rice genotypes consisting of fifteen landraces and five cultivated varieties. The Experiment was conducted in randomized block design replicated thrice, for the evaluation of thirteen quantitative traits. Significant difference for all the quantitative traits was observed among all the genotypes reflecting presence of variability and scope of selection. Based on Mahalanobis D2 analysis using Tocher’ method, five clusters were formed. Cluster V was monogenotypic and cluster I was largest having 8 genotypes. Cluster II and III consist of 5 genotypes and IVth cluster involved 3 genotypes respectively. The clustering pattern revealed that, geographical diversity was not related to genetic diversity as genotypes of same geographical region were grouped into different cluster and vice-versa. The highest intra-cluster distance was exhibited by cluster III indicating presence of high diversity within cluster, hence providing scope for exchange of genes among genotypes within these clusters. Maximum diversity based on inter-cluster distance was observed between Cluster III and IV followed by cluster II and III and cluster I and III which can be utilized by hybridization-selection breeding programme through involving genotypes in these clusters to obtain useful transgressive segregants. High cluster mean for Flag leaf length was exhibited by cluster II. Mean of cluster III was high for effective tillers per plant & chlorophyll content with early flowering, early maturity and reduced plant height. High mean of cluster for flag leaf width & panicle length with high 1000 seed weight & Harvest index was exhibited by cluster IV whereas, cluster V showed highest mean for fertile spikelet per plant and grain yield. Percent contribution towards divergence was observed maximum by plant height and appreciable by panicle length and biological yield per plant. Most of the land races were of photosensitive group and days to maturity along with harvest index did not reflect any contribution.
Pages: 605-608 | 431 Views 51 Downloads
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How to cite this article:
Chandan Kishore, Anil Kumar, Ravi Shankar Singh, Awadhesh Kumar Pal and Bishun Deo Prasad. Assessment of genetic diversity for yield and its components traits in rice (Oryza sativa L.) landraces. International Journal of Chemical Studies. 2019; 7(6): 605-608.
