古代基因组揭示了超过两千年的丁哥群体结构结构
Yassine Souilmi1,2, Sally Wasef3,4, Matthew P Williams1,5
1Australian Centre for Ancient DNA, School of Biological Sciences, The University of Adelaide, Adelaide, SA 5005, Australia.
概括
古老的丁哥基因组揭示了他们早期的澳大利亚人口结构出现了数千年前. 这项研究澄清了丁哥的起源,显示了最小的后殖民时期杂交和与新几内亚歌唱犬的明显祖先联系.
科学领域:
- 基因组学就是基因组学.
- 古生物学的古生物学
- 动物学 动物学
背景情况:
- 丁哥是澳大利亚在生态和文化上具有重要意义的犬类动物,其起源不确定,可追溯到3000年前.
- 丁哥和新几内亚歌唱犬之间的关系是复杂的,并且怀疑后殖民时期与家养狗的杂交.
- 了解丁哥的早期历史,发现种群和引入路线对于保护和生态研究至关重要.
研究的目的:
- 调查澳大利亚丁哥的早期种群结构和基因组祖先.
- 为了区分古老的丁哥血统与潜在的后殖民时期的物狗杂交.
- 为了澄清古代丁哥,现代丁哥和新几内亚歌唱犬之间的关系.
主要方法:
- 来自九个古老的丁哥标本 (4002,746岁) 的全基因组数据的分析.
- 古代丁哥基因组与现代丁哥和新几内亚歌唱犬的比较.
- 评估等位基因共享以推断人口结构和人口历史.
主要成果:
- 古代的丁哥在整个大陆上表现出类似于现代人口的种群结构,几千年前出现.
- 在新几内亚歌唱犬和古老的沿海丁哥 (新南威尔士州) 之间检测到过多的等位基因共享,但不是南澳大利亚丁哥.
- 结果表明,多个迁徙浪潮和不同的亲和关系,新几内亚歌唱狗在丁哥祖先.
结论:
- 现代的丁哥主要是几千年前引入萨胡尔的古老犬种的后裔.
- 有证据表明,后殖民时期的物狗杂交的基因组贡献很小.
- 丁戈的祖先可能涉及至少两个不同的迁移事件,来自祖先种群,与新几内亚歌唱犬有不同的联系.
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