摘要
根据80个爆裂玉米自交系数量性状的表现估算了它们之间的遗传距离及它们之间随机组配的67个杂交组合F_1代小区产量、爆粒率和膨胀倍数的杂种优势。相关和回归分析表明,F_1代产量的成分照优势与其双亲之间的遗传距离呈显著的二次曲线关系,而F_1代品质特性爆粒率和膨胀倍数的对照优势与其双亲之间的遗传距离无确定性关系。因此,可以根据亲本间数量性状的综合遗传差异——遗传距离预测爆裂玉米杂种一代产量优势。
An experiment was conducted in 1990 to 1991 at the university,to study the relationshipsbetween genetic distance,cluster analysis and heterosis in popcorn,Results showed that thereis no sense in clustoring parental lines for prediction of heterosis,but blood pedigree may be i-dentified from cluster analysis.The relation between genetic divergence or distance and yieldhetreosis can be described as Hc=a+d * D+c * D^2.The yield heterosis of F_1 hybrids can bepredieted from the genetic distances of their parental lines according to thism odel.but no defi-nite relation could be found between parental genetic divergence and the quality heterosis of F_1hybrids.
出处
《种子》
CSCD
北大核心
1992年第6期20-22,共3页
Seed
关键词
玉米
杂种优势
遗传距离
Popcorn
genetic distance
heterosis
