A Genome-Wide Perspective on the Persistence of Red Wolf Ancestry in Southeastern Canids
A Genome-Wide Perspective on the Persistence of Red Wolf Ancestry in Southeastern Canids
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DOI：
10.1093/jhered/esaa006
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发表时间：
2020-05-01
影响因子：
3.1
通讯作者：
vonHoldt, Bridgett M.
中科院分区：
文献类型：
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作者：
Heppenheimer, Elizabeth;Brzeski, Kristin E.;vonHoldt, Bridgett M.
红狼(Canis Rufus)是一种法律承认的极度濒危的狼，众所周知它与郊狼(Canis Latrans)杂交。1980年，红狼在野外被宣布灭绝，近十年后，红狼重新引入北卡罗来纳州东北部。与郊狼的杂交被认为仅限于与重新引入的种群相邻的狭窄地理区域，并且很大程度上被认为威胁到红狼的恢复。然而，最近在美国墨西哥湾沿岸的犬科动物中发现了红狼的祖先，这引发了对东南部犬科动物种群祖先的更广泛调查。在这里，我们研究了全基因组红狼祖先的地理和时间模式，在美国东南部260只犬科动物中，有超过16.4万个SNP基因座。我们发现，红狼的祖先在20世纪70年代中期从德克萨斯州采集的犬科动物中最常见，尽管今天在这个地区仍然存在着相当数量的红狼祖先。此外，在居住在北卡罗来纳州的一群郊狼中也观察到了红狼的祖先，尽管管理层努力限制杂交事件的发生。最后，我们没有发现在这两个混合区以外的东南部犬科动物中有大量红狼祖先的证据。总体而言，这项研究提供了美国东南部犬科动物红狼祖先的全基因组调查，这可能最终为未来的红狼恢复工作提供参考。
The red wolf (Canis rufus), a legally recognized and critically endangered wolf, is known to interbreed with coyotes (Canis latrans). Declared extirpated in the wild in 1980, red wolves were reintroduced to northeastern North Carolina nearly a decade later. Interbreeding with coyotes was thought to be restricted to a narrow geographic region adjacent to the reintroduced population and largely believed to threaten red wolf recovery. However, red wolf ancestry was recently discovered in canids along the American Gulf Coast, igniting a broader survey of ancestry in southeastern canid populations. Here, we examine geographic and temporal patterns of genome-wide red wolf ancestry in 260 canids across the southeastern United States at over 164 000 SNP loci. We found that red wolf ancestry was most prevalent in canids sampled from Texas in the mid-1970s, although non-trivial amounts of red wolf ancestry persist in this region today. Further, red wolf ancestry was also observed in a subset of coyotes inhabiting North Carolina, despite management efforts to limit the occurrence of hybridization events. Lastly, we found no evidence of substantial red wolf ancestry in southeastern canids outside of these 2 admixture zones. Overall, this study provides a genome-wide survey of red wolf ancestry in canids across the southeastern United States, which may ultimately inform future red wolf restoration efforts.