Introgression and molecular identification of quantitative trait loci for yield components in rice (Oryza sativa L.) variety Basmati 370

Abstract

To improve yield potential of export quality traditional Basmati rice (Oryza sativa L.) variety Basmati 370, aTl for yield components were introgressed from a high yielding tropical Japanica cultivar Palawan through marker assisted selection in BC2F2 population. Transgressive segregants were observed for all traits. Enhancement over recurrent parent for panicle weight (155.5%), panicle number (141.5%), grains per panicle (35.7%), 100-grain weight (35%), panicle length (20%) and for overall grain yield was 168.7%. A set of 201 SSR markers was used to identify and tag a total of 19 putative aTl by bulked segregant analysis. Six putative aTl for panicle number were tagged on chromosome 1, 2, 7, 8, and 12, five for panicle weight on chromosome 1, 5, 7, 9 and 12, three aTl for 100 grain weight 1, 6 and 7 and five aTl for grain yield per plant on chromosome 1, 2, 7, 8 and 12 were detected. The aTl identified in this study will be useful in molecular breeding of Basmati for improvement of yield.