Homology of Dipteran Bristles and Lepidopteran Scales: Requirement for the Bombyx mori achaete-scute Homologue ASH2

文献类型： 外文期刊

第一作者： Zhou, Qingxiang

作者： Zhou, Qingxiang;Yu, Linlin;Li, Yinue;Zhang, Zhifang;Zhou, Qingxiang;Shen, Xingjia;Yi, Yongzhu;Xu, Weihua;Xu, Weihua

作者机构：

期刊名称：GENETICS （ 影响因子：4.562； 五年影响因子：4.845 ）

ISSN： 0016-6731

年卷期： 2009 年 183 卷 2 期

页码：

收录情况： SCI

摘要： Lepidopteran wing scales and Drosophila bristles are considered homologous structures on the basis of the similarities in their cell lineages. However, the molecular mechanisms underlying scale development are essentially unknown as analysis of gene function in Lepidoptera is sorely limited. In this study, we used the Bombyx mori mutant scaleless (sl), which displays a nearly complete loss of wing scales, to explore the mechanism of lepidopteran wing-scale formation. We found that Bm-ASH2, one of four Bombyx achaete-scute homologs, is highly expressed in early pupal wings of wild-type silkworms, but its expression is severely reduced in sl pupal wings. Through molecular characterization of the mutant locus using luciferase and gel shift assays, genetic analysis of recombining populations, and in vivo rescue experiments, we provide evidence that a 26-bp deletion within the Bm-ASH2 promoter is closely linked to the sl locus and leads to loss of Bm-ASH2 expression and the scaleless-wings phenotype. Thus, the Bm-ASH2 appears to play a Critical role in scale formation in B. mori. This finding supports the proposed homology of lepidopteran scales and dipteran bristles and provides evidence for conservation of the genetic pathway in scale/bristle development at. the level of gene function.

分类号：

  • 相关文献
作者其他论文 更多>>

微信小程序