黑腹果蝇体型渐变群中的细胞基础与发育时间
Cellular basis and developmental timing in a size cline of Drosophila melanogaster.
作者信息
James A C, Azevedo R B, Partridge L
机构信息
ICAPB, Division of Biological Sciences, University of Edinburgh, United Kingdom.
出版信息
Genetics. 1995 Jun;140(2):659-66. doi: 10.1093/genetics/140.2.659.
Abstract
We examined 20 Drosophila melanogaster populations collected from a 2600-km north-south transect in Australia. In laboratory culture at constant temperature and standard larval density, a genetic cline in thorax length and wing area was found, with both traits increasing with latitude. The cline in wing area was based on clines in both cell size and cell number, but was primarily determined by changes in cell number. Body size and larval development time were not associated among populations. We discuss our results in the context of selection processes operating in natural and experimental populations.
摘要
我们研究了从澳大利亚一条南北长2600公里的样带上采集的20个黑腹果蝇种群。在恒温及标准幼虫密度的实验室培养条件下，发现了胸部长度和翅面积的遗传渐变群，这两个性状均随纬度增加。翅面积的渐变群基于细胞大小和细胞数量的渐变群，但主要由细胞数量的变化决定。种群间的体型和幼虫发育时间并无关联。我们在自然种群和实验种群中运行的选择过程的背景下讨论了我们的结果。
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