Genetic boundary and gene flow between 2 parapatric subspecies of brown rats.

Genetic boundary and gene flow between 2 parapatric subspecies of brown rats.
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褐鼠两个近亲亚种间的遗传边界和基因流

DOI:
10.1093/cz/zoaa027
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发表时间:
2020-12
期刊:
影响因子:
2.2
通讯作者:
Zhang YH
Zhang YH
中科院分区:
生物学2区
文献类型:
--
作者:
Zhao L;Zhang JX;Zhang YH

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褐家鼠(Rattus norvegicus)的两个亚种R. n. RNH和R. n. caraco(RNC),主要分布于华北和东北地区。在这里,我们的目的是探讨群体的遗传结构,遗传边界,并在这些大鼠的基因流使用16个微卫星位点。结构分析和主成分分析表明,3个祖先集群。结果表明,中间类群的遗传多样性较高,近交系数较低。3个类群间的遗传分化显著但较弱,两侧类群间的FST值较高。根据微卫星标记推断的亚种边界可能表明辽宁、内蒙古和吉林三省之间存在混杂或杂交区,而不是辽宁和吉林之间的行政省界。RNH和RNC亚种呈现出适度的基因交换和不对称的双向基因流动模式,从RNH亚种到RNC亚种的基因流动较高,限制了物种形成。这种遗传特征可以用生物学过程来解释,如扩散能力、配偶选择和动态谱系边界。
Two parapatric Rattus norvegicus subspecies, R. n. humiliatus (RNH) and R. n. caraco (RNC), are classified according to morphological divergence and are mainly distributed in North and Northeast China. Here, we aimed to explore the population genetic structure, genetic boundary, and gene flow in these rats using 16 microsatellite loci. Structure analysis and principal component analysis revealed 3 ancestral clusters. We found that the intermediate cluster exhibited higher genetic diversity and a lower inbreeding coefficient than the other 2 clusters. The genetic differentiation between the 3 clusters was significant but weak, with a higher FST value being observed between the clusters on both sides. The subspecies boundary inferred from microsatellite markers may indicate the existence of an admixture or hybridization area covering Liaoning, Inner Mongolia, and Jilin Provinces, rather than corresponding to the administrative provincial boundaries between Liaoning and Jilin. The RNH and RNC subspecies presented moderate gene exchange and an asymmetric bidirectional gene flow pattern, with higher gene flow from the RNH subspecies to the RNC subspecies, constraining speciation. Such genetic characteristics might be explained by biological processes such as dispersal ability, mate choice, and dynamic lineage boundaries.
共生的生态学,城市景观及其对城市居民挪威大鼠(Rattus Norvegicus)的遗传特征的影响。
DOI: 10.1111/j.1365-294x.2009.04232.x
发表时间: 2009-07
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影响因子: 4.9
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褐家鼠最近的进化是由有效种群规模的下降造成的。
DOI: 10.1093/molbev/msv126
发表时间: 2015-10
影响因子: 10.7
作者:
Deinum EE;Halligan DL;Ness RW;Zhang YH;Cong L;Zhang JX;Keightley PD
通讯作者: Keightley PD
DOI: 10.1111/j.1755-0998.2010.02847.x
发表时间: 2010-05-01
影响因子: 7.7
作者:
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通讯作者: Lischer, Heidi E. L.