08SG2/OsBAK1 regulates grain size and number, and functions differently in Indica and Japonica backgrounds in rice.

ABSTRACT:

Background

Both grain size and grain number are significant for rice yield. In the past decade, a number of genes related to grain size and grain number have been documented, however, the regulatory mechanisms underlying them remains ambiguous.

Results

We identified a rice small grain (sg2) mutant in an EMS mutant library generated from an indica variety, Shuhui498. Using the MutMap gene mapping strategy, we identified two linkage regions on chromosome 7 and 8, respectively, consistent with the segregation ratios in the F₂ population. We focused on the linkage region on chromosome 8, and named this locus as 08sg2. One of three SNPs identified in the linkage region was located in an exon of OsBAK1, leading to a nonsynonymous mutation in the kinase domain. The plant

SUBMITTER: Yuan H 

PROVIDER: S-EPMC5445040 | biostudies-literature | 2017 Dec

REPOSITORIES: biostudies-literature