在Iberolacerta的染色体进化,这是一种从Lacertidae的标准型公式偏离的属
Horacio Naveira1, Verónica Rojo2, Iván Gómez-Seoane3
1Grupo de Investigación en Bioloxía Evolutiva, Departamento de Bioloxía, Facultade de Ciencias, CICA, Universidade da Coruña, A Coruña, Spain. horacio.naveira.fachal@udc.es.
Genetica
|September 1, 2023
概括
伊比利亚岩石的染色体绘画揭示了Iberolacerta属的微染色体损失和复杂的性别染色体进化. 这些发现揭示了拉塞尔蒂尼内的型多样化.
科学领域:
- * 基因组学和进化生物学
- *细胞遗传学和型分析.
- * 虫学和脊椎动物学
背景情况:
- *拉塞尔蒂尼部落通常表现出38个染色体的型,包括中心的宏染色体和微染色体.
- * Iberolacerta 属与此标准有所差异,缺少微染色体,并表现出在比利尼斯山脉物种中独特的型特征.
- * 在大多数类动物中都保留了同类Z染色体,而L. schreiberi此前被认为是潜在的例外.
研究的目的:
- * 准备Iberolacerta monticola的流量排序染色体涂料,用于跨物种的比较染色体涂料.
- * 为了研究Iberolacerta属和相关的Lacertini物种中的染色体进化.
- *阐明微染色体损失背后的机制以及该组多个性染色体系统的起源.
主要方法:
- * 准备和应用来自Iberolacerta monticola的流排序染色体涂料.
- * 跨同源和相关的拉塞尔蒂尼物种进行染色体比较绘制.
- *用于对特定物种的性别染色体分析的比较基因组杂交 (CGH).
主要成果:
- * 证明Iberolacerta中的微染色体损失是与中型染色体的融合造成的.
- * 在L. schreiberi中确认了同类Z染色体,解决了其作为例外的地位.
- *表明,在Pyrenean Iberolacerta物种中的多重性染色体系统 (Z1Z2W) 起源于祖先的W染色体与自体的融合.
结论:
- *这项研究为导致微染色体损失的融合事件和Iberolacerta复杂的性别染色体系统提供了确的证据.
- * 修订了包括L. schreiberi在内的Lacertidae中对Z染色体同质性的理解.
- *强调与拉塞尔蒂尼的W染色体相关的快速DNA序列演变.
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