Analysis of Trait Introgressed Back Cross Progenies to Identify Superior Lines for Aerobic Cultivation in Rice (Oryza sativa L.)

摘要

Markers assisted back cross (DCBC3F2, Double Cross Back Cross) progenies introgressing root traits and WUE,were screened for yield performance under semi-irrigated aerobic cultivation.Based on the initial vigour 100 plants were selected for phenotyping for yield related traits. Effective surrogates such as leaf temperature for root traits, SCMR for WUEwere used for the identification of promising trait introgressed lines. The trait introgressed plants showed better yield than the recurrent parent, IR-64. Based on the variability in trait introgression, a few highly promising lines were selected using 16 traitsassociated polymorphic SSR markers. The molecular analysis suggests that the selected transgressiveseggregantswere having allelesintrogressedfrom the donor parents of the respective traits.