野生稻增产QTL导入超级杂交中稻父本9311的增产效果  

Yield-increasing Effect of Yield-enhancing QTLs from O. rufipogon Transferred to 9311,a Male Parent of Medium Super Hybrid Rice

作　　者：邓化冰[1] 邓启云[2] 陈立云[1] 杨益善[2] 刘桂明[1] 庄文[2] 熊跃东[2] 

机构地区：[1]湖南农业大学农学院,湖南长沙410128 [2]国家杂交水稻工程技术研究中心,湖南长沙410125

出　　处：《杂交水稻》2007年第4期49-52,共4页Hybrid Rice

基　　金：国家973计划项目(2006CB101700);国家863计划项目(2006AA10Z1F3)

摘　　要：在通过分子标记辅助选择获得的(9311野/生稻∥9311)BC4F3群体中选择分别携带纯合野生稻增产QTLyld1.1和yld2.1及同时携带yld1.1和yld2.1且农艺性状优良的单株各5株与培矮64S测交配制15个杂交中稻组合,以两优培九为对照,研究野生稻增产QTL的增产效果。结果表明:15个携带野生稻增产QTL组合的理论产量均高于对照,平均增产16.41%;有14个组合的实测产量高于对照,增产组合比例为93.3%,平均增产7.14%。从产量结构看,野生稻增产QTL主要是通过有效穗数的增加和结实率、千粒重的提高实现增产。说明野生稻增产QTL在改良9311的杂种中得到表达,具有显著的增产效果和重要的育种价值。Five plants containing the yield-enhancing QTLs yldl. 1, yld2. 1 or both of them were each selected from the （9311/O. rufipogon//9311 ）BC4F3 population developed by molecular marker-assisted selection and field evaluation, and they were crossed to Pei＇ai 64S to obtain 15 F1 hybrids. The yield-increasing effect of the yield-enhancing QTLs was studied with the 15 hybrid combinations and Liangyou Peijiu （Pei＇ai 64S/9311, as the check, a pioneer medium super hybrid rice combination） as materials. The results showed that the average theoretical yield of the hybrids containing the yield-enhancing QTLs was higher than that of the CK by 16.41%, the average harvest yield of them was higher than that of the CK by 7.14% with 14 （ or 93.3% ） hybrids yielding higher than the CK. The hybrids containing the yield-enhancing QTLs had more effective panicles, higher seed-setting rate and heavier 1 000-grain weight than the CK. It is indicated that the yield-enhancing QTLs：from O. rufipogon have been well expressed in the F1 hybrids of the improved 9311, and have a remarkable effect on yield increase and show a great potential in hybrid rice breeding.

关 键 词：杂交水稻 野生稻增产QTL 分子标记辅助选择(MAS) 增产效果 超高产育种 

分 类 号：Q78[生物学—分子生物学] S511.03[农业科学—作物学]