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( Ankur Kumar ),( Sudhir Kumar Dhama ),( Kuldeep Tyagi ),( Neeraj Kumar Tyagi ) 전북대학교 농업과학기술연구소 2011 농업생명과학연구 Vol.42 No.1
The present study was conducted to evaluate the genetic variability and correlation of different characters associated with grain yield in wheat. Forty genotypes were grown in randomized block design with three replications and evaluated for twelve yield and yield-related characters. Highly significant differences and adequate genetic variability were observed among the genotypes for all twelve characters. The heritability showed highest value for plant height, days to 50% flowering, days to maturity, peduncle length, 100 grain weight, number of spikelet per spike and number of grains per spikelet. Highest values of genetic advance were obtained in biological yield, plant height, days to maturity, peduncle length and days to 50% flowering. Correlation studies revealed an intensive selection for number of tillers, days to 50% flowering, days to maturity, number of spikelet per spike, number of grains per spikelet and 100 grain weight will contribute to improve the seed yield in wheat. Path analysis showed that maximum direct effect on grain yield per plant was contributed mostly by biological yield, followed by harvest index, spike length, plant height and days to 50% flowering. Principal components analysis (PCA) was performed and the first five principal components explained 75% of the observed variation. PC1 accounted for 23% of variation and showed the largest loading values for number of tiller`s per plant, biological yield and grain yield per plant. PC2 accounted for 17% and associated with plant height, peduncle length and harvest index. PC3 accounted for 13% and related to the days to 50% flowering and days to maturity. PCA analysis showed that wheat genotypes HPB42, UP2123, PBW527 and HD3024 showed good performance among wheat genotypes on the basis of all traits combined. The identified genotypes may be useful for wheat yield improvement.