摘要
以江苏沿江地区农业科学研究所培育的 3个自交系及其导入热带种质的 3个改良系为被测系 ,以 5个外引系为测验种 ,按NCⅡ设计配制 30个组合 ,分析 10种农艺性状的配合力。结果表明 :自交系“4S”在百粒重和单株产量上的一般配合力较高 ,用其作母本配制的组合具有较好的稳产性 ,“75”和“2 49”在矮化育种上具有较高的利用价值 ;导入热带种质的改良系与对应自交系相比 ,株高、穗位高的一般配合力显著增加 ,穗粗和轴粗的一般配合力亦有增加的趋势 ,其余性状则随自交系遗传背景不同而异 ;多数性状同时受父母本一般配合力和组合特殊配合力的作用 。
Thirty combinations were made between 3 inbred lines and corresponding improved inbred lines involving tropical maize germplasm as female parents and 5 inbred lines from other places as male parents with NC Ⅱ mating design to analyze the combining abilities of 10 agronomic characters.The results indicated that:① inbred line'4S'had higher general combining ability(GCA) in 100 grain weight and yield per plant,and the combinations made by 4S as female parent had better stability in yield;②'75' and '249' were of higher value in dwarf breeding;③improved inbred lines had higher GCA in plant height,ear height,ear width and rachis width than their corresponding inbred lines,while other agronomic characters performed differently according to their genetic background;④most of the agronomic characters of the combinations were affected by both parents′ GCA and SCA,and selection of the combinations with higher yield should be given consideration to both GCA and SCA.
出处
《江苏农业学报》
CSCD
2001年第4期215-218,共4页
Jiangsu Journal of Agricultural Sciences
基金
江苏省"九五"攻关资助项目"高产优质多抗玉米新组合选育 (BG96 5 11)
