作者: Michelle Orane Schemberger , Viviane Demetrio Nascimento , Rafael Coan , Érica Ramos , Viviane Nogaroto
DOI: 10.1007/S00412-019-00721-9
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摘要: Sex chromosome differentiation is subject to independent evolutionary processes among different lineages. The accumulation of repetitive DNAs and consequent crossing-over restriction guide the origin heteromorphic sex region. Several Neotropical fish species have emerged as interesting models for understanding evolution genome diversity, although knowledge their genomes scarce. Here, we investigate content between males females Apareiodon sp. based on large-scale genomic data focusing W differentiation. In Apareiodon, are heterogametic (ZW) homogametic (ZZ). size estimate was 1.2 Gb (with ~ 42× ~ 47× coverage females, respectively). sp., approximately 36% composed transposable elements (TEs) were most abundant class. Read analysis revealed amounts in females. female-enriched clusters located mostly microsatellite expansions DNA transposons. Landscape TE contents demonstrated two major waves invasions TEs genome. Estimation insertion times correlated with situ locations permitted inference that helitron, Tc1-mariner, CMC EnSpm transposons accumulated repeated copies during 20 12 million years ago. appeared be players modifications chromosomes.