不同柞蚕品种幼虫腹足趾钩数量的研究

Studies on the Crochet Numbers of Abdominal Legs of Larvae for Different Varieties of Antheraea pernyi

调查4个柞蚕亲本原种、8个杂交种F1代的5龄幼虫腹足趾钩数量，并对其进行统计分析，发现柞蚕幼虫腹足趾钩数量品种间存在显著差异，但同一品种雌雄间差异不显著。其遗传方式为偏父遗传；杂种F1代表现杂种优势。同时对幼虫腹足趾钩数与若干经济性状的相关性做了分析，发现幼虫腹足趾钩数与收蚁结茧率、单蛾结茧数、单蛾茧层量、单蛾收茧量、蛹期生命率等性状呈显著正相关关系。因此，认为柞蚕幼虫双足趾钩数目可以作为一项生理（形态）指标，在柞蚕育种、杂种优势的利用及杂交组合的选配中用于预测产量及其它生命力性状。

The crochet numbers of aboondnal legr of larvae for 4 parent Strains and 8 F1 hybrids were invotigated.The results showed that the crochet numbers of abdominal legr of larvae have remarkable differences amongdifferent silkworm varieties, but no obvious differences between male and female silkworme. The heredity of thistrait is patroclinal. The croche numbers of abdominal legs have a remarkable positive correlation with some cocoonproduction characters and surviving rate of pupa but no obvious correlation with cocoon quality characters. Therefore,the croche numbers of abdominal legs of larvae can be used as a phpsiological parameter for estimationg the cocoonproduction and resistibility in breeding, ultilndion of hybrid vigor and selection of cross combinations.