摘要
通过自交分离和抗寒性鉴定,选育出经济性状优良的结球甘蓝抗寒自交系逾30份,以其中6份抗寒性有一定差异的自交系为试材,按照Griffing双列杂交方法Ⅳ进行甘蓝抗寒性配合力及遗传力分析。结果表明:甘蓝抗寒性遗传符合加性—显性模型,以加性效应为主,随着寒害程度的增加其加性效应所占比重增加;一般配合力方差在总遗传方差中所占比重较大,一般配合力/特殊配合力的均方比大于7,且差异达极显著水平,因此在甘蓝抗寒育种中应重视早期世代的选择。结合配合力测定结果及田间经济性状调查结果,初步明确两个优良抗寒越冬甘蓝新组合。
By segregated population selection and cold-resistance identification,over 30 elite inbred lines were developed in cabbage(Brassica oleracea var.capitata L.).Using Griffing Ⅳ method,cabbage combining ability and heritability of cold-resistance characteristic were analyzed,taking 6 inbred lines with different cold-resistance as testing materials.The results showed that the characteristic of cold-resistance was controlled by additive effect and non-additive effect,but mainly by additive effect.The percentage of additive effect increased with the decrease of low temperature.GCA(general combining ability)variance accounted for a large proportion in the total genetic variance,and the mean square ratio of GCA and SCA was greater than 7,which also had significant difference at 1 % level.For cold-resistant breeding,early generation selection should be emphasized.With the results of combining ability analysis and investigation of other economic characteristics,two elite cold-resistant combinations were confirmed.
出处
《中国蔬菜》
北大核心
2011年第14期23-27,共5页
China Vegetables
基金
国家自然科学基金项目(30700543)
国家‘十一五’科技支撑计划项目(2009BADB8B03)
中央级公益性科研院所基本科研业务费专项(201109)
农业部园艺作物遗传改良重点开放实验室项目
农业部大宗蔬菜产业技术体系项目(CARS-25)
关键词
结球甘蓝
抗寒性
配合力
遗传力
组合选育
Cabbage
Cold-resistance
Combining ability
Heritability
Combination breeding
