甘蔗亲本及杂交组合对褐条病的抗性配合力分析

The analysis of combining ability for resistance to sugarcane brown stripe disease of parents and cross combinations

以23个甘蔗母本(ROC5为对照)、21个甘蔗父本(69–463为对照)以及他们配制的29个杂交组合(ROC5×69–463为对照)为材料,进行甘蔗褐条病抗性配合力分析。结果表明:甘蔗母本间、甘蔗父本间以及甘蔗杂交组合间的配合力存在极显著差异,差异是加性和非加性基因共同作用的结果;抗褐条病平均遗传力大小顺序为母本(95.3%)、组合(93.0%)、父本(79.1%);一般配合力表现为负效应的母本有Pma98–40、崖城93–26、云瑞05–283、粤糖91–976、川蔗19号、ROC10、云蔗06–80、ROC26、湛蔗74–141、K86–110、云蔗03–194和ROC25等12个,一般配合力表现为负效应的父本有Q199、云瑞06–649、云瑞05–733、CP84–1198、CP88–1762、崖城84–125、云瑞05–784、粤糖00–236、CP72–3591和CP94–110等10个;杂交组合的特殊配合力表现为负效应的有Pma98–40×云瑞05–649、崖城93–26×云瑞05–733、云瑞05–283×Q199、粤糖91–976×CP84–1198、川蔗19号×CP88–1762和ROC10×粤农73–204等16个。

The combining ability of resistance to sugarcane brown stripe disease was analyzed based on 23 female parents（ROC 5 for control） and 21 male parents（69–463 for control））and their 29 crosse combinations（ROC 5×69–463 for control））. The results indicated that difference of the combining ability among the female parents, male parents and crosse combinations was significant, which was mainly controlled by additive and non–additive gene. The average heritability of resistance to sugarcane brown stripe disease was female parents（95.3%）,cross combinations（93.0%）and male parents（79.1%）. The general combining ability of 12 female parents, 10 male parentsshowed negative effect, which female parents were Pma 98–40, Yacheng 93–26, Yunrui 05–283, Yuetang 91–976, Chuangzhe 19, ROC 10, Yunzhe 06–80, ROC 26, Zhanzhe 74–141, K 86–110,Yunzhe 03–194 and ROC 25. male parents were Q 199, Yunrui 06–649, Yunrui 05–733, CP 84–1198, CP 88–1762,Yacheng 84–125,Yunrui 05–784,Yuetang 00–236, CP 72–3591 and CP 94–110. The special combining ability of 16 crosses combinations showed negative effect, they were Pma98–40×Yunrui05–649, Yacheng93–26× Yunrui 05–733, Yunrui 05–283×Q199,Yuetang 91–976×CP 84–1198,Chuanzhe 19×CP 88–1762 and ROC 10×Yuenong 73– 204.