Fine mapping a quantitative trait locus, qSER-7, that controls stigma exsertion rate in rice (Oryza sativa L.).

ABSTRACT:

Background

Stigma exsertion rate (SER) is a key determinant of outcrossing in hybrid rice seed production. A quantitative trait locus (QTL) for stigma exsertion rate in rice, qSER-7, has previously been detected on chromosome 7 by using a F₂ population derived from two indica cytoplasmic male sterility (CMS) maintainers, Huhan 1B and II-32B.

Results

The chromosomal location of qSER-7 was precisely delimited by fine-scale mapping. Near-isogenic lines (NILs) were established, one of which isolated the locus in the qSER-7^II-32B line, which contains an introgressed segment of II-32B in the Huhan 1B genetic background, and exhibits a significantly higher stigma exsertion rate than that of the recurrent parent. Using 3192 individuals from the BC₄F<

SUBMITTER: Liu Y 

PROVIDER: S-EPMC6616572 | biostudies-literature | 2019 Jul

REPOSITORIES: biostudies-literature