摘要
1991 -1 996年以 4 3个综合表现良好的亲本配制的二交、四交、八交、十六交组合为材料 ,比较了组合后代农艺性状的平均数和变异性表现及选择效果 ,以探讨不同亲本数杂交对后代的遗传变异的影响。试验结果表明 :亲本数较多的杂交组合后代性状的变异性大于亲本数较少的杂交组合后代相应性状的变异性。这说明 ,增加杂交组合的亲本数有增加后代变异的趋势。遗传相对简单的性状这种趋势越明显。除二交各性状的平均数较小外 ,其它不同杂交数的各类组合的后代在主要产量性状的平均数、1
Progenies of two-parent、four-parent、eight-parent and sixteen-parent crosses made with 43 good parents were compared on performance and selection response of their agronomic traits. The objective of this study was to explore the effectiveness of different parental numbers on genetic variation and mean performance of the filial-generations,and to provide theoretical bases for parental mating and progeny selection in soybean breeding. The experimental results showed that:In the crosses containing more parental numbers,yield-trait variation of progenies were comparative large. This suggested that increasing parental numbers of crosses seemed to be able to increase variation of progenies. The traits relatively simply inherited exhibited this trend more apparently than the relatively complex genetic characters. Among the crosses of different parental numbers, the average and proportion of 10 highest of the seven characteristics were similar.
出处
《大豆科学》
CSCD
北大核心
2000年第2期105-110,共6页
Soybean Science
关键词
大豆
亲本
遗传育种
杂交后代
农艺性状
Soybean
Mean performance
Genetic variation
Agronomic traits
