Positive interactions of major-effect QTLs with genetic background that enhances rice yield under drought.

ABSTRACT: To improve the grain yield of the lowland-adapted popular rice variety Samba Mahsuri under reproductive-stage drought (RS) and to understand the interactions between drought QTLs, two mapping populations were developed using marker-assisted selection (MAS) and marker-assisted recurrent selection (MARS). The mean grain yield of pyramided lines (PLs) with qDTY _2.2  + qDTY _4.1 in MAS is significantly higher under RS and irrigated control than lines with single QTLs. Among MARS PLs, lines with four qDTYs (qDTY _1.1  + qDTY _2.1  + qDTY _3.1  + qDTY _11.1 ) and two QTLs (qDTY _1.1  + qDTY _11.1 ) yielded higher than PLs with other qDTY combinations. The selected PLs showed a yield advantage of 0.3-2.0 t ha^-1<

SUBMITTER: Sandhu N 

PROVIDER: S-EPMC5786057 | biostudies-literature | 2018 Jan

REPOSITORIES: biostudies-literature