Ecological Genetics of Sex-Chromosome Traits in the Tiger Swallowtail Butterfly Hybrid Zone

虎燕尾蝶杂交区性染色体性状的生态遗传学

• 批准号: 9981608
• 负责人: Adam Porter
• 金额: $ 33万
• 依托单位: University of Massachusetts Amherst
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-03-15 至 2004-02-29
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9981608&HistoricalAwards=false
• 关键词: Ecological; Genetics; Sex; Chromosome; Traits

9981608 PorterThe tiger swallowtail butterfly species Papilio glaucus and P. canadensismeet in a narrow zone of hybridization across the eastern US. They differin ecologically important traits, including the control of winter diapauseand the mimicry (only by P. glaucus females) of a related, distastefulspecies. These traits are controlled by genes on the X- and Y-chromosomes.Theoretical advances in the biology of hybrid zones, such as this one,have allowed the measurement of the strength of natural selection acting onecologically important traits, as well as the rate that other genes canslip through to the opposite species. The authors will use this theory tomeasure the strength of natural selection acting on diapause, wingcoloration and other X- and Y-associated traits. They will do parallelfield experiments to measure selection on these traits. Finally, they willmeasure the ability of this selection to block the spread of other genesbetween these hybridizing species.Sex chromosomes play a central role in biology and have several propertiesunique from other chromosomes, but biologists have few data from natureabout how evolutionary forces affect sex-chromosome variation. The authorsof this study exploit key features of the biology of these butterflies tostudy the evolutionary pressures acting on sex chromosomes and the spreadof genes between related species.

9981608 Porter 虎凤蝶品种 Papilio glaucus 和 P. canadensism 在美国东部的一个狭窄的杂交区域相遇。 它们在生态上的重要特征上有所不同，包括对冬季滞育的控制和对相关的、令人厌恶的物种的模仿（仅由雌性青绿雀）。 这些性状由 X 和 Y 染色体上的基因控制。杂交区生物学的理论进展，例如这一方面，使得能够测量自然选择作用于生态学重要性状的强度，以及自然选择的速率。其他基因可以转移到相反的物种。 作者将利用这一理论来衡量自然选择对滞育、翅膀颜色以及其他 X 和 Y 相关性状的作用强度。 他们将进行平行场实验来衡量对这些性状的选择。 最后，他们将测量这种选择阻止其他基因在这些杂交物种之间传播的能力。性染色体在生物学中发挥着核心作用，并具有一些与其他染色体不同的特性，但生物学家很少有来自自然界的关于进化力量如何影响性染色体的数据变化。 这项研究的作者利用这些蝴蝶生物学的关键特征来研究作用于性染色体的进化压力以及相关物种之间的基因传播。