家蚕突变型第2煤色(so2)的遗传学研究
Genetical Research of Mutant Sooty 2 (so2) in Silkworm, Bombyx mori
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摘要: 家蚕第2煤色(so2)发掘于西南大学家蚕基因资源库保存的16-111系统,其主要特征为:幼虫体表污灰色,蛹色黝黑.其它性状均正常.遗传分析结果:第2煤色(so2)对正常型为隐性,单基因突变;是相似性状突变型煤色(so)的等位基因,对煤色(so)为显性.因此,家蚕第26号染色体上该基因座的3个等位基因间的显隐性关系为:+＞so2＞so.
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关键词:
- 家蚕,突变,体色黑化,遗传
Abstract: "Sooty 2" (so2) has been discovered in silkworm strain 16-111 conserved in the Silkworm Re-source Bank at Southwest University. It is characterized by dirty grey colored body surface of the larva andblack-skin pupa. The other traits are all normal. Genetic analysis shows that it is controlled by a single re-cessive mutant gene. It is the allele of sooty(so)with similar characters, and so2 seems to be dominant toso. Therefore, the dominant-recessive relationship of the 3 alleles at the locus on the 26 th chromosome insilkworm is +＞so2＞so. -
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