Identification and mapping of stable QTL with main and epistasis effect on rice grain yield under upland drought stress.

ABSTRACT:

Background

Drought is one of the most important abiotic stresses that cause drastic reduction in rice grain yield (GY) in rainfed environments. The identification and introgression of QTL leading to high GY under drought have been advocated to be the preferred breeding strategy to improve drought tolerance of popular rice varieties. Genetic control of GY under reproductive-stage drought stress (RS) was studied in two BC1F4 mapping populations derived from crosses of Kali Aus, a drought-tolerant aus cultivar, with high-yielding popular varieties MTU1010 and IR64. The aim was to identify QTL for GY under RS that show a large and consistent effect for the trait. Bulk segregant analysis (BSA) was used to identify significant markers putatively linked with high GY under drought.

Resu

SUBMITTER: Sandhu N 

PROVIDER: S-EPMC4048250 | biostudies-literature | 2014 May

REPOSITORIES: biostudies-literature