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首页> 外文期刊>Journal of genetics >Novel non-autonomous transposable elements on W chromosome of the silkworm, Bombyx mori
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Novel non-autonomous transposable elements on W chromosome of the silkworm, Bombyx mori

机译：家蚕W染色体上的新型非自主转座因子

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摘要

The sex chromosomes of the silkworm Bombyx mori are designated ZW(XY) for females and ZZ (XX) for males. Numerous long terminal repeat (LTR) and non-LTR retrotransposons, retroposons and DNA transposons have accumulated as strata on the W chromosome. However, there are nucleotide sequences that do not show the characteristics of typical transposable elements on the W chromosome. To analyse these uncharacterized nucleotide sequences on the W chromosome, we used whole-genome shotgun (WGS) data and assembled data that was obtained using male genome DNA. Through these analyses, we found that almost all of these uncharacterized sequences were non-autonomous transposable elements that do not fit into the conventional classification. It is notable that some of these transposable elements contained the Bombyx short interspersed element (Bm1) sequences in the elements. We designated them as secondary-Bm1 transposable elements (SBTEs). Because putative ancestral SBTE nucleotide sequences without Bm1 do not occur in theWGS data, we suggest that the Bm1 sequences of SBTEs are not carried on each element merely as a package but are components of each element. Therefore, we confirmed that SBTEs should be classified as a new group of transposable elements.
机译：家蚕的性染色体对雌性命名为ZW（XY），对雄性命名为ZZ（XX）。许多长末端重复序列（LTR）和非LTR逆转座子，逆转座子和DNA转座子已作为W染色体上的层积聚。但是，有些核苷酸序列未显示W染色体上典型的转座元件的特征。为了分析W染色体上这些未鉴定的核苷酸序列，我们使用了全基因组shot弹枪（WGS）数据和使用男性基因组DNA获得的组装数据。通过这些分析，我们发现几乎所有这些未表征的序列都是非自治的转座元件，不适合常规分类。值得注意的是，其中一些可转座元件中包含Bombyx短穿插元件（Bm1）序列。我们将它们指定为次级Bm1转座因子（SBTE）。因为在WGS数据中没有Bm1的假定祖先SBTE核苷酸序列不会出现，所以我们建议SBTE的Bm1序列不是仅作为包装携带在每个元件上，而是每个元件的组成部分。因此，我们确认应将SBTE归为一组新的转座因子。

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