A better finder rename 8.783/17/2024 Furthermore, chromosomal mapping of satDNAs suggests high turnover of neo-sex chromosomes in R. We showed highly differentiated neo-XY sex chromosomes owing to major amplification of satDNAs in neo-Y. These results imply differential amplification of satDNAs on neo-Y chromosome and a minor role of TEs in sex chromosome differentiation. The satDNAs were 13.5% more abundant in males than in females, while TEs were just 1.02% more abundant in females. We found a total of 53 satDNA families and 56 families of TEs. Here, we characterized the satellite DNAs (satDNAs) and transposable elements (TEs) of the species to investigate the quantitative differences in repeat composition between male and female genomes putatively associated with sex chromosomes. This is the case of Ronderosia bergii, in which further large pericentromeric inversion in the neo-Y also took place, making this species particularly interesting for investigating sex chromosome evolution. However, in some species, derived variants like neo-XY in males evolved several times independently by Robertsonian translocation. In grasshoppers, the X0 sex-determining system in males is considered ancestral. A common characteristic of sex chromosomes is the accumulation of repetitive DNA, which accounts for their diversification and degeneration.
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