Dissertation Research: Genetics of Interspecific Sperm Precedence in Drosophila

开始指定是指一个单一的繁殖统一的生物群分裂成两个这样的群的过程。人们对产生生殖隔离的基因类型知之甚少。这项建议中概述的实验旨在确定两个果蝇物种Drosspila simans和D.mauritiana之间导致生殖隔离的候选基因。虽然这些物种可以杂交，但由于同种雄性的精子优先受精，因此仍然存在后交配生殖隔离。影响这一精子竞争特征的男性和女性成分的基因的染色体区域将通过遗传图谱进行定位。通过思考一种解释物种起源的机制，查尔斯·达尔文阐明了自然选择进化论。自从这一开创性的理论被引入以来，进化生物学领域取得了很大的进展。然而，物种形成的过程仍然是一个谜，特别是在遗传层面上。这项研究的结果将有助于确定可以进行各种分析的“物种形成基因”，并最终有助于对物种形成机制的总体理解。

0073245BegunSpeciation is the process whereby a single reproductively unified group of organisms diverges into two such groups. Little is known about the types of genes that generate reproductive isolation. The experiments outlined in this proposal aim to identify candidate genes contributing to reproductive isolation between two fruit fly species, Drososphila simulans and D. mauritiana. Although these species can hybridize, postmating reproductive isolation still exists due to the preferential fertilization of eggs by sperm of conspecific males. The chromosomal regions of genes that influence both male and female components of this sperm competition trait will be localized through genetic mapping. By pondering a mechanism to explain the origin of species, Charles Darwin elucidated the theory of evolution via natural selection. Much progress in the field of evolutionary biology has been made since the introduction of this seminal theory. However, the process of speciation is still a mystery, particularly at the genetic level. The results of this study will help identify "speciation genes" that can be subjected to various analyses, and ultimately contribute to a general understanding of mechanisms of speciation.