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Patterns of genome size variation in snapping shrimp

机译:鳄虾基因组大小变异的模式

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摘要

Although crustaceans vary extensively in genome size, little is known about how genome size may affect the ecology and evolution of species in this diverse group, in part due to the lack of large genome size datasets. Here we investigate interspecific, intraspecific, and intracolony variation in genome size in 39 species of Synalpheus shrimps, representing one of the largest genome size datasets for a single genus within crustaceans. We find that genome size ranges approximately 4-fold across Synalpheus with little phylogenetic signal, and is not related to body size. In a subset of these species, genome size is related to chromosome size, but not to chromosome number, suggesting that despite large genomes, these species are not polyploid. Interestingly, there appears to be 35% intraspecific genome size variation in Synalpheus idios among geographic regions, and up to 30% variation in Synalpheus duffyi genome size within the same colony.
机译:尽管甲壳类动物在基因组大小上差异很大,但是对于基因组大小如何影响这一多样化群体中物种的生态和进化知之甚少,部分原因是缺乏大型基因组大小数据集。在这里,我们调查了39种Synalpheus虾的种间,种内和菌落内基因组大小的变异,这代表了甲壳类中单个属的最大基因组大小数据集之一。我们发现基因组大小范围跨越整个Synalpheus几乎没有系统发生信号的4倍,并且与体型无关。在这些物种的一个子集中,基因组大小与染色体大小有关,但与染色体数目无关,这表明尽管基因组很大,但这些物种并非多倍体。有趣的是,同一殖民地之间,中华绒螯蟹的种内基因组大小变异似乎有35%,而达芙妮达菲基因组的基因变异则高达30%。

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