Copulation duration, but not paternity share, potentially mediates inbreeding avoidance in Drosophila montana
Copulation duration, but not paternity share, potentially mediates inbreeding avoidance in Drosophila montana
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交配持续时间，而不是亲子份额，可能介导蒙大拿州果蝇的近交避免
DOI：
10.1007/s00265-014-1807-7
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发表时间：
2014
影响因子：
2.3
通讯作者：
Ala-Honkola O
中科院分区：
文献类型：
--
作者：
Ala-Honkola O
研究近亲繁殖避免的发生率对于理解交配系统的进化很重要，特别是在遗传亲和性的配偶选择的背景下。我们通过测量交配潜伏期(一种衡量雄性吸引力的指标)、交配持续时间、交配天数、后代产量以及第一(P1)和第二(P2)雄性在全同胞和无关配对中交配的后代比例，研究了近亲繁殖避免机制是否在麦芽果蝇中进化。SNP标记用于父子关系分析和计算配对配对之间的配对亲缘关系值(基因共享)。我们在卵到成虫的存活率中发现了18%的近亲繁殖抑制，这表明与近亲交配的成本很高。交配过的雌性与其兄弟的交配持续时间比与无血缘关系的雄性的交配持续时间短。根据早期的一项研究，较短的交配可能会通过减少雌性繁殖时间来减少近亲交配后代的数量。然而，较短的交配并不会导致全同胞雄性的父子关系降低(P2)。与无亲缘关系的雄性相比，当第二个雄性是全同胞时，双交配雌性的后代产量较低，但我们不能区分近亲交配抑制和与亲缘交配后雌性生殖努力降低。基于34个SNPs的亲缘关系估计没有检测到亲缘关系变异对交配持续时间和后代产量的任何量化影响。我们认为近亲交配抑制已经足够强烈，足以在我们的芬兰D选择近亲交配避免机制。蒙大拿州人口。
Studying the incidence of inbreeding avoidance is important for understanding the evolution of mating systems, especially in the context of mate choice for genetic compatibility. We investigated whether inbreeding avoidance mechanisms have evolved in the malt fly,Drosophila montana, by measuring mating latency (a measure of male attractiveness), copulation duration, days to remating, offspring production, and the proportion of offspring sired by the first (P1) and second (P2) male to mate in full-sibling and unrelated pairs. SNP markers were used for paternity analysis and for calculating pairwise relatedness values (genotype sharing) between mating pairs. We found 18 % inbreeding depression in egg-to-adult viability, suggesting that mating with close relatives is costly. Copulation duration was shorter between previously mated females and their brothers than with unrelated males. Based on an earlier study, shorter copulation is likely to decrease the number of inbred progeny by decreasing female remating time. However, shorter copulations did not lead to lower paternity (P2) of full-sibling males. Progeny production of double-mated females was lower when the second male was a full-sibling as compared to an unrelated male, but we could not distinguish between inbreeding depression and lower female reproductive effort after mating with a relative. Relatedness estimates based on 34 SNPs did not detect any quantitative effect of relatedness variation on copulation duration and progeny production. We suggest that inbreeding depression has been strong enough to select for inbreeding avoidance mechanisms in our FinnishD. montanapopulation.
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影响因子：
2.1
作者：
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通讯作者：
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DOI：
10.1098/rspb.2004.2843
发表时间：
2004
期刊：
Proceedings of the Royal Society of London. Series B: Biological Sciences
影响因子：
--
作者：
T. Pizzari;H. Løvlie;Charlie K. Cornwallis
通讯作者：
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影响因子：
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作者：
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影响因子：
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作者：
ASPI, J;LANKINEN, P
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