The consequences of facultative sex in a prey adapting to predation
The consequences of facultative sex in a prey adapting to predation
复制标题
兼性性行为对猎物适应捕食的影响
DOI：
10.1111/jeb.12987
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发表时间：
2017
影响因子：
2.1
通讯作者：
L. Becks
中科院分区：
文献类型：
--
作者：
L. Becks
一个物种的繁殖模式及其相关的成本和收益在其进化和生存中起着重要作用。兼性行为，既能有性繁殖也能无性繁殖，被认为是有利于进化的，因为这两种模式的好处都可以充分实现。事实上，许多研究都集中在确定性行为的好处和/或使用兼性物种选择增加性行为率的力量。然而，这两种模式的代价也会对种群的进化轨迹产生深远的影响。在这里，我们使用实验进化和适应性分析来研究兼性行为对猎物适应捕食的影响。具体来说，我们比较了暴露于轮虫持续捕食的藻类猎物种群的适应性反应，这些种群具有无性繁殖和有性繁殖交替周期，其中性事件要么是兼性的（有性和无性后代同时繁殖），要么是专性的（只有有性后代繁殖）。我们发现，与专一性行为的猎物种群相比，兼性行为的猎物种群最终的相对适合度较低，在选择的特征上，即防御和竞争能力，遭受了更大的权衡。我们的研究结果表明，有性繁殖（发芽时间）和无性繁殖（选择干扰）的相关成本在兼有性猎物群体中被放大，导致性行为的净优势减少。此外，我们发现有证据表明，在专性猎物种群中，性成本降低了，因为通过性细胞的自发产生，观察到性选择的增加。这些结果表明，与兼性行为相关的某些成本可以影响生物体的进化轨迹。
A species reproductive mode, along with its associated costs and benefits, can play a significant role in its evolution and survival. Facultative sexuality, being able to reproduce both sexually and asexually, has been deemed evolutionary favourable as the benefits of either mode may be fully realized. In fact, many studies have focused on identifying the benefits of sex and/or the forces selecting for increased rates of sex using facultative sexual species. The costs of either mode, however, can also have a profound impact on a population's evolutionary trajectory. Here, we used experimental evolution and fitness assays to investigate the consequences of facultative sexuality in prey adapting to predation. Specifically, we compared the adaptive response of algal prey populations exposed to constant rotifer predation and which had alternating cycles of asexual and sexual reproduction where sexual episodes were either facultative (sexual and asexual progeny simultaneously propagated) or obligate (only sexual progeny propagated). We found that prey populations with facultative sexual episodes reached a lower final relative fitness and suffered a greater trade‐off in traits under selection, that is defence and competitive ability, as compared to prey populations with obligate sexual episodes. Our results suggest that costs associated with sexual reproduction (germination time) and asexual reproduction (selection interference) were amplified in the facultative sexual prey populations, leading to a reduction in the net advantage of sexuality. Additionally, we found evidence that the cost of sex was reduced in the obligate sexual prey populations because increased selection for sex was observed via the spontaneous production of sexual cells. These results show that certain costs associated with facultative sexuality can affect an organism's evolutionary trajectory.
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DOI：
--
发表时间：
2019
期刊：
The Biological Resources of Model Organisms
影响因子：
--
作者：
P. Lefebvre;M. Laudon;C. Silflow
通讯作者：
C. Silflow
影响因子：
3.1
作者：
CHARLESWORTH, B
通讯作者：
CHARLESWORTH, B
生态进化反馈促进红皇后动态并在捕食者群体中选择性别
影响因子：
3.3
作者：
Haafke;Abou Chakra;L. Becks
通讯作者：
L. Becks
多基因模型中重组的选择——机制。
DOI：
10.1017/s0016672300023958
发表时间：
1988
期刊：
Genetical research
影响因子：
--
作者：
J. Maynard Smith
通讯作者：
J. Maynard Smith
DOI：
--
发表时间：
1978
期刊：
影响因子：
--
作者：
J. Jaenike
通讯作者：
J. Jaenike