果蝇六龄幼虫盾片刚毛的选择

Selection for six scutellar chaetae in Drosophila melanogaster.

Department of Genetics and Human Variation, La Trobe University, Bundoora, Victoria, Australia.

Theor Appl Genet. 1972 Jan;42(1):12-5. doi: 10.1007/BF00306072.

Abstract

From a base population showing some flies with more than the normal 4 scutellar chaeta phenotype directional selection was carried out and lead to a line with many flies having 6 chaetae. 2. Selection was then practised for 6 chaetae such that the extra 2 chaetae were in the anterior left and anterior right positions on the scutellum. This lead to a line with most flies having this chaeta number and pattern, therefore showing some canalization. 3. Additive genetic activity controlling the increased chaeta number was found on all the 3 major chromosomes.

摘要

从一个表现出比正常 4 个盾板刚毛多的个体的基础群体中进行了定向选择，导致一条有许多个体具有 6 个刚毛的品系。
然后对 6 个刚毛进行了选择，使得额外的 2 个刚毛在前左和前右的盾板位置。这导致一条具有大多数个体具有这种刚毛数量和模式的品系，因此显示出一些形态发生的趋同现象。
发现控制增加的刚毛数量的加性遗传活性存在于所有 3 条主要染色体上。