Fitness decline under relaxed selection in captive populations
Fitness decline under relaxed selection in captive populations
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DOI：
10.1046/j.1523-1739.1999.97518.x
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发表时间：
1999-06-01
影响因子：
6.3
通讯作者：
Reed, DH
中科院分区：
文献类型：
--
作者：
Bryant, EH;Reed, DH
我们比较了生活史的时间表之间的种群的家蝇（Musca acutica L.）在实验室中，在缩短寿命的情况下维持，使得对仅影响晚年健康性状的突变的选择减少。由于这种制度，晚年（而不是早期）的繁殖力在几代内下降。结果表明，如果圈养种群保持最低限度的选择，无论是通过直接操纵的环境或均衡家庭的贡献，潜在的有害突变的频率增加，可能会迅速降低这些人口在自然条件下存在的能力。这将是独立的人口规模，所以扩大圈养人口不会减轻潜在的健身减少，由于放松选择。
We compared life-history schedules among populations of the housefly (Musca domestica L.) maintained in the laboratory under curtailed life span, such that selection on mutations that affected only late-life fitness traits was reduced As a result of this regime, late-life (but not early-life) fecundity declined within a few generations. The results suggest that if captive populations are maintained with minimal selection, either by direct manipulation of the environment or by equalizing family contributions, the increased frequency of potentially deleterious mutations may rapidly lower the ability of these populations to exist under natural conditions. This would be independent of population size, so expanding captive populations would not alleviate potential fitness reductions due to relaxed selection.