Research advance in genetic regulation mechanism of seed domancy in rice
Seed dormancy ensures that seeds germinate under optimal conditions and is of great significance for the sur-vival and environmental adaptation of plants.The strength of seed dormancy affects seed germination rate,germination uniformity,and subsequent growth,which are crucial for crop yield and quality.Seed dormancy is a complicated phenom-enon,which is regulated by endogenous hormones,environmental effects,and complex genetic networks.Among them,the phytohormone abscisic acid(ABA)and gibberellic acid(GA)are the major endogenous regulators in the seed dorman-cy.Most dormancy-related genes mediate seed dormancy by directly or indirectly affecting GA or ABA-related genes.Over the past few decades,breeders have conducted quantitative trait locus(QTL)mapping studies on rice seed dormancy and,in combination with a series of mutants related to rice germination,have preliminarily revealed the molecular mecha-nisms of seed dormancy.This review summarizes the key genes and their regulatory mechanisms controlling rice seed dor-mancy in recent years,with the aim of providing assistance for further research in this direction and molecular breeding of rice for resistance to premature germination.
国家科技期刊平台
NSTL
万方数据
