Gammerdinger William J, Conte Matthew A, Sandkam Benjamin A, Penman David J, Kocher Thomas D
Department of Biology, University of Maryland, College Park, MD 20742, USA.
Hydrobiologia. 2019 Apr;832(1):397-408. doi: 10.1007/s10750-018-3778-6. Epub 2018 Sep 26.
The African cichlid radiations have created thousands of new cichlid species with a wide diversity of trophic morphologies, behaviors, sensory systems and pigment patterns. In addition, recent research has uncovered a surprising number of young sex chromosome systems within African cichlids. Here we refine methods to describe the differentiation of young sex chromosomes from whole genome comparisons. We identified a novel XY sex chromosome system on linkage group 14 in , confirmed a linkage group 1 XY system in and also defined the limits of our methodology by examining a ZW system on linkage group 3 in . These data further demonstrate that cichlids are an excellent model system for understanding the early stages of sex chromosome evolution.
非洲丽鱼科鱼类的辐射演化产生了数千个新的丽鱼物种，它们具有各种各样的食性形态、行为、感觉系统和色素模式。此外，最近的研究发现非洲丽鱼科鱼类中存在数量惊人的年轻性染色体系统。在这里，我们改进了从全基因组比较中描述年轻性染色体分化的方法。我们在[具体物种1]的连锁群14上鉴定出一个新的XY性染色体系统，在[具体物种2]中证实了连锁群1上的XY系统，并通过研究[具体物种3]连锁群3上的ZW系统确定了我们方法的局限性。这些数据进一步证明，丽鱼科鱼类是理解性染色体进化早期阶段的优秀模型系统。
