VARIABILITY AND GENETIC DIVERSITY OF RICE (ORYZA SATIVA L.) FOR YIELD AND YIELD RELATED TRAITS UNDER AEROBIC CONDITIONRatnakar Manjunath Shet, M.V. Mohan Kumar, N. Jagadeesha, Ashok, M.S. Anantha and M.P. Rajanna
Two hundred indica rice accessions were evaluated under aerobic condition for thirteen quantitative traits to examine the nature and magnitude of variability and genetic divergence. Among all traits, grain yield per plant exhibited highest estimate of PCV and GCV followed by productive tillers/plant and filled grains/ panicle. Broad sense heritability was highest for 50 per cent flowering followed by 1000 seed weight and filled grains/panicle. On the basis of D2 analysis 200 rice accessions were grouped into five clusters and two ungrouped clusters and first two principle component revealed presence of four distinct clusters and five ungrouped clusters. Accessions with Contrasting expressions for yield and yield related traits were identified for developing suitable rice genotypes under aerobic cultivation.
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