Parasite resistance predicts fitness better than fecundity in a natural population of the freshwater snail Potamopyrgus antipodarum
Parasite resistance predicts fitness better than fecundity in a natural population of the freshwater snail Potamopyrgus antipodarum
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在淡水蜗牛 Potamopyrgus antipodarum 的自然种群中，寄生虫抵抗力比繁殖力更能预测健康状况
DOI：
10.1111/evo.13768
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发表时间：
2019
期刊：
影响因子：
3.3
通讯作者：
Jokela, Jukka
中科院分区：
文献类型：
--
作者：
Paczesniak, Dorota;Klappert, Kirsten;Kopp, Kirstin;Neiman, Maurine;Seppälä, Katri;Lively, Curtis M.;Jokela, Jukka
在与有性生殖的雌性竞争时，雄性的成本应该会给无性生殖的雌性带来优势。此外，高繁殖力的无性基因型应具有优势，低繁殖力的克隆，导致随着时间的推移减少克隆多样性。为了评估健身组件在自然人群中，我们测量了年繁殖率的个人性和无性femalePotamopyrgus antipodarum，新西兰淡水蜗牛，在现场外壳，排除竞争对手和捕食者。我们使用等位酶基因分型分配无性雌性特定的克隆基因型。我们发现，最多产的无性系有类似或更高的繁殖力的前10%的有性家庭，这表明繁殖力的选择，即使没有男性的成本，将导致取代有性群体的克隆。因此，我们预期繁殖力最高的无性系将在自然种群中占主导地位。与这一预测相反，我们发现高的年繁殖率与自然种群中克隆的频率无关。当我们在实验室中将相同的克隆暴露于寄生虫时，我们发现对感染的抵抗力与种群中克隆的频率呈正相关。生殖力和寄生虫抗性之间的相关性是负的，这两个性状之间的权衡。因此，我们的研究结果表明，寄生虫抗性是无性繁殖成功的一个重要的短期预测因子。在这个群体中，
The cost of males should give asexual females an advantage when in competition with sexual females. In addition, high-fecundity asexual genotypes should have an advantage over low-fecundity clones, leading to reduction in clonal diversity over time. To evaluate fitness components in a natural population, we measured the annual reproductive rate of individual sexual and asexual femalePotamopyrgus antipodarum, a New Zealand freshwater snail, in field enclosures that excluded competitors and predators. We used allozyme genotyping to assign the asexual females to particular clonal genotypes. We found that the most fecund asexual clones had similar or higher fecundity as the top 10% of sexual families, suggesting that fecundity selection, even without the cost of males, would lead to replacement of the sexual population by clones. Consequently, we expected that the clones with the highest fecundity would dominate the natural population. Counter to this prediction, we found that high annual reproductive rates did not correlate with the frequency of clones in the natural population. When we exposed the same clones to parasites in the laboratory, we found that resistance to infection was positively correlated with the frequency of clones in the population. The correlation between fecundity and parasite resistance was negative, suggesting a trade-off between these two traits. Our results thus suggest that parasite resistance is an important short-term predictor of the success of asexualP. antipodarumin this population.
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影响因子：
3.4
作者：
J. Wolinska;C. Lively
通讯作者：
C. Lively
影响因子：
2.9
作者：
LIVELY, CM;LLOYD, DG
通讯作者：
LLOYD, DG
DOI：
10.1098/rspb.1995.0065
发表时间：
1995-04-22
影响因子：
4.7
作者：
DYBDAHL, MF;LIVELY, CM
通讯作者：
LIVELY, CM
影响因子：
64.8
作者：
LIVELY, CM
通讯作者：
LIVELY, CM
比较淡水蜗牛 Campeloma limum 的孤雌生殖与有性生殖种群的繁殖力：是否存在两倍的性成本？
DOI：
--
发表时间：
2009
期刊：
影响因子：
--
作者：
Lisa T Crummett;M. Wayne
通讯作者：
M. Wayne