Geographically consistent hybridization dynamics between the Black-crested and Tufted titmouse with evidence of hybrid zone expansion
Geographically consistent hybridization dynamics between the Black-crested and Tufted titmouse with evidence of hybrid zone expansion
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黑冠山雀和簇绒山雀之间地理上一致的杂交动态，并有杂交区域扩张的证据
DOI：
10.1093/ornithology/ukad014
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发表时间：
2023
期刊：
影响因子：
2.3
通讯作者：
Taylor, Scott A.
中科院分区：
文献类型：
--
作者：
Semenov, Georgy A.;Curry, Claire M.;Patten, Michael A.;Weir, Jason T.;Taylor, Scott A.
我们研究了黑冠和簇绒山雀在两个地理上不同的断面，不同的时间由数百至数千年的二次接触之间的杂交。我们发现，杂交模式对应于本地化的杂交群体，山雀杂交区可能会随着时间的推移而缓慢扩大，出生后的传播距离短，加上弱或不存在的选择对混合物的产品。我们发现，南部的混合区位于得克萨斯州是四倍，比北方地区的杂交在俄克拉荷马州，这可能是由于混合区年龄的地理差异。尽管在宽度上的差异，大多数人在这两个样带先进的一代杂交和回交，表明地理上一致的杂交动态。我们记录了基因型和羽毛指数之间的强相关性，这表明杂交尚未导致在其他一些鸟类杂交区观察到的羽毛和全基因组血统脱钩。虽然我们的研究结果表明杂交区正在不断扩张，但扩张的速度似乎很慢，每年几十米的规模，而且可能需要几十万到几百万年的时间才能使亲本种群同质化。虽然我们没有发现支持部分生殖隔离在杂交区本身，有可能是生态或性选择限制渗入到异地区域。从广义上讲，我们的研究结果突出了多个，地理上遥远的，横跨杂交区的横断面评估杂交谱系的进化动力学的价值。
We studied hybridization between the Black-crested and Tufted titmouse across two geographically distinct transects that differ in the timing of secondary contact by hundreds to thousands of years. We found that hybridization patterns correspond to localized hybrid swarms and that the titmouse hybrid zone is likely slowly expanding over time, a product of short post-natal dispersal distances coupled with weak or absent selection against admixture. We show the southern part of the hybrid zone located in Texas is four times wider than the northern region of hybridization in Oklahoma, which is likely due to geographic differences in hybrid zone age. Despite differences in width, most individuals in both transects are advanced-generation hybrids and backcrosses, suggesting geographically consistent hybridization dynamics. We documented a strong correlation between genotypes and plumage index, suggesting that hybridization has not yet resulted in the decoupling of plumage and genome-wide ancestry as observed in some other avian hybrid zones. Although our results suggest the ongoing expansion of the hybrid zone, the rate of expansion appears to be slow, on the scale of tens of meters a year, and it will likely take hundreds of thousands to millions of years before homogenization of the parental populations. While we did not find support for partial reproductive isolation in the hybrid zone itself, there is the possibility that ecological or sexual selection limits introgression into allopatric regions. Broadly, the results of our study highlight the value of multiple, geographically distant, transects across a hybrid zone for assessing the evolutionary dynamics of hybridizing lineages.
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影响因子：
3.3
作者：
J. K. Pritchard;Matthew Stephens;Peter Donnelly
通讯作者：
J. K. Pritchard;Matthew Stephens;Peter Donnelly
影响因子：
48
作者：
Langmead, Ben;Salzberg, Steven L.
通讯作者：
Salzberg, Steven L.
影响因子：
4.1
作者：
Gompert Z;Buerkle CA
通讯作者：
Buerkle CA
DOI：
--
发表时间：
1978
期刊：
影响因子：
--
作者：
K. Dixon
通讯作者：
K. Dixon
时间复杂的雀形目杂种区生殖隔离的演变
DOI：
--
发表时间：
2014
期刊：
影响因子：
--
作者：
Claire M Curry
通讯作者：
Claire M Curry