Consequences of Hybridization in Mammals: A Systematic Review.
Consequences of Hybridization in Mammals: A Systematic Review.
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DOI：
10.3390/genes13010050
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发表时间：
2021-12-24
期刊：
影响因子：
3.5
通讯作者：
Pilot M
中科院分区：
文献类型：
--
作者：
Adavoudi R;Pilot M
杂交，被定义为两个不同分类单元之间的繁殖，会对杂交类群的进化模式产生重要影响。尽管种间杂交经常被视为一种不利适应的过程，它通过基因淹没和远交衰退威胁物种的遗传完整性和生存，但在某些情况下，杂交能够引入新的适应性变异并提高适应性。到目前为止，大多数研究都集中在记录杂交事件和分析其原因上，而对于杂交的后果及其对亲本物种的影响知之甚少。为了填补这一知识空白，我们对2010 - 2021年发表的关于哺乳动物杂交的研究进行了系统综述，并确定了115项相关研究。在这些研究描述的13类杂交后果中，最常见的负面后果（21%的研究）是基因淹没，最常见的正面后果（8%的研究）是获得新的适应性变异。负面后果的总频率（49%）高于正面（13%）和中性（38%）后果。这些频率受到微卫星位点检测可能性的影响，微卫星位点是所评估论文中最常用的遗传标记。由于负面结果通常比正面结果更容易证明（例如，灭绝与杂交物种形成），它们在出版物中可能被过度呈现。向涉及中性和适应性变异的基因组研究转变将更好地洞察杂交的实际影响。
Hybridization, defined as breeding between two distinct taxonomic units, can have an important effect on the evolutionary patterns in cross-breeding taxa. Although interspecific hybridization has frequently been considered as a maladaptive process, which threatens species genetic integrity and survival via genetic swamping and outbreeding depression, in some cases hybridization can introduce novel adaptive variation and increase fitness. Most studies to date focused on documenting hybridization events and analyzing their causes, while relatively little is known about the consequences of hybridization and its impact on the parental species. To address this knowledge gap, we conducted a systematic review of studies on hybridization in mammals published in 2010–2021, and identified 115 relevant studies. Of 13 categories of hybridization consequences described in these studies, the most common negative consequence (21% of studies) was genetic swamping and the most common positive consequence (8%) was the gain of novel adaptive variation. The total frequency of negative consequences (49%) was higher than positive (13%) and neutral (38%) consequences. These frequencies are biased by the detection possibilities of microsatellite loci, the most common genetic markers used in the papers assessed. As negative outcomes are typically easier to demonstrate than positive ones (e.g., extinction vs hybrid speciation), they may be over-represented in publications. Transition towards genomic studies involving both neutral and adaptive variation will provide a better insight into the real impacts of hybridization.
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影响因子：
2.6
作者：
Beauclerc, Kaela B.;Bowman, Jeff;Schulte-Hostedde, Albrecht I.
通讯作者：
Schulte-Hostedde, Albrecht I.
影响因子：
9.4
作者：
Balao, Francisco;Casimiro-Soriguer, Ramon;Talavera, Salvador
通讯作者：
Talavera, Salvador
影响因子：
3.7
作者：
Baird, Amy B.;Braun, Janet K.;Bickham, John W.
通讯作者：
Bickham, John W.
影响因子：
3.3
作者：
ANDERSON, E;STEBBINS, GL
通讯作者：
STEBBINS, GL
影响因子：
1.7
作者：
Arbogast, Brian S.;Schumacher, Katelyn I.;Kenagy, G. J.
通讯作者：
Kenagy, G. J.