化杀杂交稻F1产量性状优势及其与亲本的关系  

The Heterosis of F_1 of chemically Emasculated Hybrid Rice in Yield- related Characters and Its Relation with Parents

作　　者：李希芳[1] 黄凤仪[1] 吴东辉[1] 万霞 

机构地区：[1]广东省农科院水稻所

出　　处：《杂交水稻》1989年第4期14-17,共4页Hybrid Rice

摘　　要：采用较易杀雄制种的品种为母本，与高产品种或品系配制组合１９个， 研究化杀杂交稻Ｆ１主要产量性状的优势及其与亲本的关系。结果表明，Ｆ１的单株 粒重优势最大，主要由每穗实粒数、总粒数、单株穗数的优势综合构成。Ｆ１的单 株粒重、总粒数、实粒数、千粒重与亲本平均值呈极显著正相关，与父本值呈极显 著或显著正相关，Ｆ１实粒数、千粒重与母本值是极显著正相关。选用双亲主要性 状良好的品种配组，易选育出高产化杀组合。The rice varieties which are easily emasculated were used as female parents to make 19 combinations with high yielding varieties or lines so as to study the keterosis of F1 of chemically emasculated hybrid rice in yield- related characters and its relation with parents. The results have showed that the heterosis of F1 in grain weight per plant is the strongest which mainly results from the summing-up of its beterosis in number of filled grains per panicle. total number of grains and panicle number per plant.Tbe grain weight per plant, total number of grains. number of filled grains and 1000gain-weight of F1 are directly iutertelated with their average value of parents very significanty, and directly interrelated with those of its male parent very significantly or significantly.The number of filled grants and 1000-grain-weight of F1 is ditectly interrelated with those of its female parent very significantly. If varieties with good yield--related characters are used as parents to make hybrid combinations, the high yielding combinations made by chemical emasculation will be easily selected.

关 键 词：杂交稻 产量性状 亲本 水稻 

分 类 号：S511.101[农业科学—作物学]