Re-mating across years and intralineage polygyny are associated with greater than expected levels of inbreeding in wild red deer
Re-mating across years and intralineage polygyny are associated with greater than expected levels of inbreeding in wild red deer
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DOI：
10.1111/j.1420-9101.2012.02626.x
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发表时间：
2012-12-01
影响因子：
2.1
通讯作者：
Pemberton, J. M.
中科院分区：
文献类型：
--
作者：
Stopher, K. V.;Nussey, D. H.;Pemberton, J. M.
philopatry和非随机交配之间的相互作用对种群的遗传结构有重要影响，影响社会群体内的共祖，但也近亲繁殖。在这里，使用遗传亲子关系数据，我们描述了交配模式在野生种群的红鹿（马鹿）与显着后果的共同祖先和近亲繁殖的人口。大约五分之一的女性与她们以前交配过的男性交配，此外，女性经常与女性亲戚也曾与之交配过的男性交配（系内一夫多妻制）。这两种现象在随机交配下的发生率都比预期的要高。使用模拟，我们表明，时间和空间因素，以及在男性育种成功的偏斜，是重要的，在促进双方重新交配行为和intralineage一夫多妻制。然而，模拟的信息不足以解释这些行为发生的程度。我们发现，重新交配和intralineage一夫多妻制与人口中的成对相关性增加，平均近交系数上升。特别是，后者导致男性的相关性和车辙位置之间的相关性，与相关的男性更有可能在彼此接近车辙。这些模式，以及它们对种群遗传结构的影响，在野生一夫多妻哺乳动物中很少被记录，但它们对我们理解遗传结构、避免近亲繁殖和在此类系统中扩散具有重要意义。
The interaction between philopatry and nonrandom mating has important consequences for the genetic structure of populations, influencing co-ancestry within social groups but also inbreeding. Here, using genetic paternity data, we describe mating patterns in a wild population of red deer (Cervus elaphus) which are associated with marked consequences for co-ancestry and inbreeding in the population. Around a fifth of females mate with a male with whom they have mated previously, and further, females frequently mate with a male with whom a female relative has also mated (intralineage polygyny). Both of these phenomena occur more than expected under random mating. Using simulations, we demonstrate that temporal and spatial factors, as well as skew in male breeding success, are important in promoting both re-mating behaviours and intralineage polygyny. However, the information modelled was not sufficient to explain the extent to which these behaviours occurred. We show that re-mating and intralineage polygyny are associated with increased pairwise relatedness in the population and a rise in average inbreeding coefficients. In particular, the latter resulted from a correlation between male relatedness and rutting location, with related males being more likely to rut in proximity to one another. These patterns, alongside their consequences for the genetic structure of the population, have rarely been documented in wild polygynous mammals, yet they have important implications for our understanding of genetic structure, inbreeding avoidance and dispersal in such systems.