Evolution and development of male-specific leg brushes in Drosophilidae.
Evolution and development of male-specific leg brushes in Drosophilidae.
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DOI：
10.1007/s00427-022-00694-3
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发表时间：
2022-12
影响因子：
2.4
通讯作者：
Kopp, Artyom
中科院分区：
文献类型：
--
作者：
Tanaka, Kohtaro;Barmina, Olga;Thompson, Ammon;Massey, Jonathan H.;Kim, Bernard Y.;Suvorov, Anton;Kopp, Artyom
关键词：
性二型性状的起源、多样化和二次丧失在动物进化中是常见的。在某些情况下，结构和功能相似的性状在多个谱系中独立进化。这些特征的突出例子包括在许多双翅目昆虫的前腿上发育的雄性特有的抓握结构。在这份报告中，我们描述了这些结构之一，男性特有的“性刷”的演变和发展。性刷是由密集的，不规则排列的修饰刚毛组成，在果蝇科的几个远亲谱系中发现。系统发育分析使用250个基因从200多个物种提供了适度的支持，一个单一的起源性刷其次是许多次要的损失，但是，独立的起源性刷不能完全排除。我们表明，性刷在所有刷轴承谱系非常相似的方式发展。刷毛的密集包装的解释是由规格的刚毛前体细胞在侧抑制机制所允许的接近最大密度，以及周围的上皮细胞的大小减小。相反，女性和祖先男性的条件，其中刚毛是在刻板的，精确间隔的行，细胞迁移并没有明显的性别刷的形成。性刷复杂的系统发育历史使其成为研究性别特异性形态和交配行为协同进化的一个有价值的模型。
The origin, diversification, and secondary loss of sexually dimorphic characters are common in animal evolution. In some cases, structurally and functionally similar traits have evolved independently in multiple lineages. Prominent examples of such traits include the male-specific grasping structures that develop on the front legs of many dipteran insects. In this report, we describe the evolution and development of one of these structures, the male-specific “sex brush”. The sex brush is composed of densely packed, irregularly arranged modified bristles and is found in several distantly related lineages in the family Drosophilidae. Phylogenetic analysis using 250 genes from over 200 species provides modest support for a single origin of the sex brush followed by many secondary losses; however, independent origins of the sex brush cannot be ruled out completely. We show that sex brushes develop in very similar ways in all brush-bearing lineages. The dense packing of brush hairs is explained by the specification of bristle precursor cells at a near-maximum density permitted by the lateral inhibition mechanism, as well as by the reduced size of the surrounding epithelial cells. In contrast to the female and the ancestral male condition, where bristles are arranged in stereotypical, precisely spaced rows, cell migration does not contribute appreciably to the formation of the sex brush. The complex phylogenetic history of the sex brush can make it a valuable model for investigating coevolution of sex-specific morphology and mating behavior.
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影响因子：
6.5
作者：
Anisimova M;Gil M;Dufayard JF;Dessimoz C;Gascuel O
通讯作者：
Gascuel O
影响因子：
10.7
作者：
Minh BQ;Nguyen MA;von Haeseler A
通讯作者：
von Haeseler A
影响因子：
6.5
作者：
Lewis, PO
通讯作者：
Lewis, PO
DOI：
10.1098/rstb.2005.1669
发表时间：
2005-07-29
影响因子：
6.3
作者：
Felsenstein, J
通讯作者：
Felsenstein, J
影响因子：
2.9
作者：
Kopp A
通讯作者：
Kopp A