Ecology, Environment and Conservation Paper

PRINCIPAL COMPONENT ANALYSIS OF RICE GENOTYPES GROWN UNDER NORMAL AND FLASH FLOOD ENVIRONMENTS

D. Sathyaraj, T. Sabesan, K. Sowmia, K. Saravanan and P. Satheesh Kumar

Abstract

In the present study, Principal Component Analysis (PCA) was carried out to find the genetic divergence among 30 genotypes of rice grown under normal (E1) and flash flood environments (E2).They were evaluated for nine quantitative traits viz., days to fifty per cent flowering, plant height, number of productive tillers per plant, panicle length, number of grains per panicle, hundred grain weight, grain length, grain breadth and grain yield per plant. Principal Component Analysis (PCA) under normal (E1) environment revealed that out of 9 components, only two PCs exhibited more than 1.0 Eigen value and showed about 62.66 per cent of total variability. Under flash flood (E2), three PC’s exhibited Eigen value >1 with 73.92 per cent of total variability among the characters. The biplot analysis, which was employed to identify the best performing genotypes and to unravel patterns of genotypes both under normal and stressed conditions, resulted in identification of CR-1009 Sub-1, Swarna Sub-1, AU-1 GSR, Mappilai samba and Seeraga samba as potential parent for future submergence tolerance breeding programme.