Germplasm Resources and Genetic Breeding Utilization of Multiple-grain Rice
Rice (Oryza sativa) is one of the most important food crops in the world and a model plant for study of molecular developmental biology in monocots.Panicle morphology is an important component of rice production and has become a "hot" topic in genetic improvement and developmental biology research of rice.Multiple-grain rice is a mutant of spikelets,which can be divided into clustered-spikelet and multi-pistil types created by natural mutation,hybrid variation,and physical/chemical mutagenesis.As a new germplasm resource,multiple-grain rice can help to establish new materials,new varieties,and sterility propagation and help in research into mechanisms of rice flowering.Because of spike grain density,multiple-grain rice can be used for large-compound-grain rice breeding materials,improving spike grain density and grain number per spike,shortening spike length,ameliorating rice plant traits,enhancing resistance and increasing yield.Here,we summarize the features of multiple-grain rice,origin,genetic analysis,gene location and breeding utilization,and point out the future of this research,which should provide a reference for further researching multiple-grain rice.
国家科技期刊平台
NSTL
万方数据
维普
