Resequencing of 1,143 indica rice accessions reveals important genetic variations and different heterosis patterns.

ABSTRACT: Obtaining genetic variation information from indica rice hybrid parents and identification of loci associated with heterosis are important for hybrid rice breeding. Here, we resequence 1,143 indica accessions mostly selected from the parents of superior hybrid rice cultivars of China, identify genetic variations, and perform kinship analysis. We find different hybrid rice crossing patterns between 3- and 2-line superior hybrid lines. By calculating frequencies of parental variation differences (FPVDs), a more direct approach for studying rice heterosis, we identify loci that are linked to heterosis, which include 98 in superior 3-line hybrids and 36 in superior 2-line hybrids. As a proof of concept, we find two accessions harboring a deletion in OsNramp5, a previously reported gene functio

SUBMITTER: Lv Q 

PROVIDER: S-EPMC7508829 | biostudies-literature | 2020 Sep

REPOSITORIES: biostudies-literature