Affiliation:
1. Rice Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China
2. Guangdong Key Laboratory of New Technology in Rice Breeding, Guangzhou 510640, China
Abstract
Floral organ development determines agricultural productivity by affecting seed development, seed quality, and final yield. In this study, we described the novel ogl mutant in rice (Oryza sativa L.), which is characterized by an open-glume phenotype, increased pistil number, reduced stamen number, decreased seed setting rate, and smaller rice grains. Genetic analysis showed that the open-glume phenotype might be controlled by a recessive qualitative trait locus. Employing bulked segregant analysis (BSA), one candidate region was identified on rice chromosome 1. The glume opening phenotype cosegregated with SNP (Chr1:1522703), which was located at the start codon of one transcript of OsJAG, resulting in partial loss of OsJAG function. cDNA analysis revealed that OsJAG encodes two transcript variants. Compared to normal plants, the expression of OsJAG.1 was upregulated in open-glume plants. When investigating the glume phenotype, we found that the expression of genes related to floral development changed greatly in open-glume plants. Taken together, this work increases our understanding of the developmental role of OsJAG in rice floral development.
Funder
Guangdong Basic and Applied Basic Research Foundation
Agricultural Competitive Industry Discipline Team Building Project of Guangdong Academy of Agricultural Sciences
Guangdong Special Funds for Rural Revitalization
Projects of Guangdong Key Laboratory
Key Field Research and Development Project of Guangdong Province
Subject
Inorganic Chemistry,Organic Chemistry,Physical and Theoretical Chemistry,Computer Science Applications,Spectroscopy,Molecular Biology,General Medicine,Catalysis