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Evolution and genetics of functionally-related traits, male wing pigmentation and courtship behavior, in the oriental Drosophila melanogaster species group.

机译:功能性性状,雄性机翼色素沉着和求爱行为的进化和遗传学,在东方果蝇中。

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摘要

The evolution of one morphological trait usually depends on or is facilitated by functionally related traits, such as physiological, behavioral, or other morphological traits. In the Oriental Drosophila melanogaster species group, some species possess male-specific pigmentation in the apical wing area, referred to as wing spots. Wing spots have been proposed to evolutionarily couple with frontal-wing-display in courtship. But the proposal that sexual selection shapes the evolution of wing spots is still untested. In theory, sexual selection on a wing spot display could be promoted by genetic correlations between the pigmentation and behavioral components of this complex trait. How often this scenario might occur nature is unknown. In this dissertation, the functionality, evolutionary history, and genetic architecture of wing spots and courtship behavior were explored using various approaches. First, wing spots were found to serve as a visual stimulus via frontal wing display in behavioral essays, which support the hypothesis that sexual selection drives the evolution of wing spots and wing display behavior. Second, the association between wing pigmentation and wing display behavior was confirmed to be robust phylogenetically. This part of the study also revealed that courtship songs, another male display component, evolve rapidly and exhibit novel features in this clade. Third, genetic analysis in a pair of crossable species, one of which having lost both wing spots and wing displays, elucidated the genetic correlation of these two traits. Interestingly, the major quantitative trait locus (QTL) for wing pigmentation and one QTL for wing display behavior are located on the same region of the X chromosome, indicating either close linkage or pleiotropy. This finding provides a possible genetic mechanism for the coordinate evolution of these two traits. A central focus of modern evolutionary biology has been on the genetic underpinnings of morphological evolution. This study takes this question one step further by providing insights on the evolutionary integration of a morphological trait and the behavior by which it is utilized.
机译:一种形态性状的进化通常取决于功能相关性状,例如生理性,行为性或其他形态性状,或由其促进。在东方果蝇种组中,一些种在顶翼区域具有雄性特异性色素沉着,称为翼斑。已经提出了翼点在进化上与前翼展示相结合。但是关于性选择影响翅膀斑点进化的提议仍然未经检验。从理论上讲,通过这种复杂性状的色素沉着和行为成分之间的遗传相关性,可以促进翼展上的性选择。这种情况多久发生一次自然是未知的。本文利用多种方法探讨了翼缘的功能,进化史,遗传结构和求爱行为。首先,在行为作文中,通过前翅展示发现了翅斑作为视觉刺激,这支持了性别选择驱动翅斑和翅展示行为进化的假说。第二,机翼色素沉着和机翼展示行为之间的关联被证实在系统发育上是可靠的。研究的这一部分还揭示了求爱歌曲,这是男性的另一种表现成分,在这种进化枝中迅速发展并展现出新颖的特征。第三,对一对可交配物种的遗传分析阐明了这两个性状的遗传相关性,其中一对可交配物种失去了翅膀的斑点和翅膀的展示。有趣的是,机翼色素沉着的主要数量性状位点(QTL)和机翼显示行为的一个QTL位于X染色体的同一区域,表明紧密连锁或多效性。这一发现为这两个性状的协调进化提供了可能的遗传机制。现代进化生物学的中心焦点一直放在形态进化的遗传基础上。这项研究通过提供有关形态特征的进化整合及其利用行为的见解,使这一问题更进一步。

著录项

  • 作者

    Yeh, Shu-Dan.;

  • 作者单位

    State University of New York at Stony Brook.;

  • 授予单位 State University of New York at Stony Brook.;
  • 学科 Biology Entomology.;Biology Evolution and Development.;Biology Genetics.
  • 学位 Ph.D.
  • 年度 2009
  • 页码 289 p.
  • 总页数 289
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

  • 入库时间 2022-08-17 11:37:47

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