IDENTIFICATION OF POTENTIAL DONORS THROUGH GENE PROFILING FOR RICE IMPROVEMENT

Abstract

The experimental field was laid in RBD design replicated thrice using 30 advanced breeding lines and BPT-5204 as quality check. For characterization of advanced breeding lines seven genes (Gn1, Gn2, SCM2, SCM3, Gs3, Gw5, Spl14) and three QTLs (Yld12.1, Yld2.1 and Yld2.1) for grain yield; two genes (Gn1 and Gn2) for grain number; two genes (SCM2 and SCM3) for strong culm; one gene each for grain weight (Gw5); grain size (Gs3), filled grains per panicle (Spl14) were selected. Upon genotyping, only one advanced breeding line SP-08 showed the presence of the seven yield contributing genes/QTLs indicating
possibility of higher yield potential. Two advanced breeding lines showed the presence of six yield contributing genes/QTLs. They are SP-69 contain (Gn1, Gn2, SCM3, Gw5, Spl14, Yld2.1) and SP-70 contain genes/QTLs (Gn1, SCM3, Gw5, Gs3, Yld2.1, Yld12.1). Whereas four advanced breeding lines showed the presence of five yield contributing genes. They are SP-37 (Gn2, SCM3, Gw5, Yld12.1, Yld2.1), SP-55 (Gn2, SCM2, SCM3, Gw5, Yld2.1), SP-75 (Gn1, Gn2, SCM3, Gw5, Yld12.1) and
SP-61 (Gn1, Gn2, SCM2, Gw5, Yld 2.1).