关键词: 籼稻 粳稻 粒形性状 产量 稻米品质 数量性状基因座

Abstract:

Graln shape is one of the important factors, which were associated with rice yield. It is not only directly correlated with grain yield, but also indirectly affects the rice quality. Therefore, research works concerning genetics of grain shape, the relativities between grain shape, rice grain qualities, and OTLs of grain shape characteristics have been paid wide attention by the people. Up to now, many research activities have obtained remarkable progress in these areas. But most of the results were obtained by using genetic materials derived from a crossing between Indica/ Indica or Indica/Japonica. There are few research activities carried out for studying the genetic characteristics of genetic materials crossed between Japonica and Japonica and all these studies were mainly focused on grain length, grain width, ratio of grain length to width and grain weight. Few studies were concentrated on grain thickness. Therefore, attention should be paid to strengthen studies related to genetic and molecular mechanism of grain shape in Japonica rice, the inheritance of grain thickness, and relationships between grain shape and rice function components in the future.

Key words: Indica rice, Japonica rice, grain shape characteristics, grain yield, rice grain quality, quantitative trait loci