Neff B D
Department of Neurobiology and Behavior, Cornell University, Ithaca, NY 14853, USA.
J Hered. 2001 Mar-Apr;92(2):111-9. doi: 10.1093/jhered/92.2.111.
Fish have some of the most complex mating systems known in the animal kingdom. With the advent of powerful genetic markers and an emerging mathematical framework to calculate parentage, it is now possible to analyze genetic relatedness and gene flow in these systems. An important example is the bluegill sunfish (Lepomis macrochirus) which consists of parental males that provide sole care for the young, cuckolder males that parasitize the parentals, and females that actively choose among males within dense breeding colonies. In this article genetic markers for bluegill are characterized and their utility in parentage studies is demonstrated by calculating the genetic relatedness of parental males to their broods for an entire natural breeding colony. A novel Monte Carlo simulation is developed to calculate the confidence in the relatedness estimates and these data are used to provide an estimate of the mean breeding success of parental and cuckolder males. Finally, the applications of genetic analyses to understanding mating systems, parental care, and life-history evolution in bluegill are discussed.
鱼类拥有动物王国中已知的一些最为复杂的交配系统。随着强大的基因标记的出现以及用于计算亲权的新兴数学框架的出现，现在有可能分析这些系统中的遗传相关性和基因流动。一个重要的例子是蓝鳃太阳鱼（Lepomis macrochirus），它由为幼鱼提供唯一照料的亲本雄性、寄生在亲本身上的戴绿帽雄性以及在密集繁殖群体中主动在雄性之间进行选择的雌性组成。在本文中，对蓝鳃太阳鱼的基因标记进行了表征，并通过计算整个自然繁殖群体中亲本雄性与其后代之间的遗传相关性，证明了它们在亲权研究中的实用性。开发了一种新颖的蒙特卡罗模拟来计算相关性估计的置信度，并利用这些数据来估计亲本雄性和戴绿帽雄性的平均繁殖成功率。最后，讨论了遗传分析在理解蓝鳃太阳鱼的交配系统、亲本照料和生活史进化方面的应用。
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