粳稻数量性状的遗传距离及其在杂种优势利用上的应用

THE GENETIC DISTANCE OF JAPOMICA RICE’S QUANTITATIVE CHARACTERS AND ITS USE IN THE HYBRID VIGOR

取宁夏粳稻杂种优势利用研究的试验材料30份，其中引进及自己选育的恢复系10份，已经转育成不育系的保持系及近年来育成的新品系20份。在对其8个数量性状进行方差分析的基础上，对其遗传距离进行了测定，通过与目前宁夏水稻生产中已经应用的杂交粳稻组合的遗传距离相比较，可以看出利用现有的亲本资源通过合理的组配，育成更强优势的组合是可能的。

The paper talks about the use of 30 experimental materials as the result of the research on the use of Japonica rice＇s, round-grained nonglutinous rice＇s, hybrid vigor. Among these 30 materials, ten are introduced or self-selected and cultivated restore lines and 20 are maintaince lines which have been transformed into sterile lines and some are newly cultivated lines in the recently years. On the basis of analysis of variance in the 8 quantitative characters, the authors have measured their genetic distances. In comparison with the genetic distances of the hybrid Japonica Rice Society being used in the present Ningxia＇s production. it shows the possibility of a stronger dominance through the use of present parental respurces under appropriate matching and cultivation.