摘要
采用双列杂交设计,对28个家蚕杂交组合及8个亲本作比较试验,用多元统计方法定量测定家蚕亲本遗传距离与F_1茧质性状的杂种优势的关系。结果表明,亲本遗传距离与杂种优势之间呈极显著的直线相关与回归关系,遗传距离在一定范围内(30<d_(ij)<580),杂种优势随着遗传距离的增大而增强。因而,可以用亲本遗传距离较好地预测家蚕杂种优势。
A comparative experiment on 28 silkworm hydrids and 8 parents, which is performed according to NC Ⅱ design, and measured with multiple statistics, shows that between silkworm's heterosis and its parental genetic distance, most remarkably exists the relationship of straight line and regression. Within a certain genetic distance limit (30<dij<580), the farther the genetic distance between parents is, the stronger the heterosis will be. Therefore, it is practicable to predict heterosis according to the parental genetic distance of silkworm.
出处
《南京农专学报》
1995年第3期15-17,共3页
Journal of Nanjing Agricultural Technology College
关键词
家蚕
遗传距离
杂种优势
silkworm
genetic distance
heterosis
correlation and regression
