不对称的伴侣偏好和生殖干扰调解了小哺乳动物混合区中伴侣可用性的气候诱导变化
Marjorie D Matocq1, Elizabeth A Hunter2, Peter J Murphy1
1Department of Natural Resources and Environmental Science; Program in Ecology, Evolution, and Conservation Biology, University of Nevada, Reno, NV, United States.
Evolution; international journal of organic evolution
|August 7, 2024
概括
干旱改变了木鼠种群,增加了杂交率,因为伴侣变得稀缺. 基因组不相容性和不对称的交配偏好影响了繁殖成功,影响了范围边缘的物种进化.
科学领域:
- 生态学和进化生物学.
- 遗传学 遗传学是一种遗传学.
- 气候变化生物学 气候变化生物学
背景情况:
- 由于环境变化,物种的范围发生变化,影响范围边缘的种群动态.
- 密切相关物种之间的二次接触区域对于理解物种化和杂交至关重要.
- 木鼠 (Neotoma属) 提供了一个模型系统,用于研究物种接触区对气候变化的反应.
研究的目的:
- 为了研究两种木鼠物种之间的二次接触区中改变伴侣可用性的繁殖结果.
- 确定行为和遗传机制在不断变化的环境条件下塑造人口动态中的作用.
- 评估干旱驱动的差异性生存对杂交率和基因组内进化的影响.
主要方法:
- 现场测量亲属分析以记录生殖成功.
- 评估伴侣的可用性和杂交率.
- 实验室偏好试验,以评估不对称的交配偏好.
- 通过混合繁殖成功对基因组不相容性的分析.
主要成果:
- 干旱引起的差异性生存率导致同种类伴侣的可用性降低.
- 减少同物种伴侣的可用性与增加的杂交率相关.
- 观察到不对称的交配偏好和部分基因组不相容性 (特别是F1雄性).
- 在F1雌性中,高繁殖成功和反向交叉促进了物种间的内侵.
结论:
- 气候变化可以通过在物种范围边缘的行为,人口和遗传相互作用来改变进化轨迹.
- 二次接触区是动态的,易受物种组成和基因流动变化的影响.
- 了解生殖隔离和侵入机制对于预测物种对气候变化的反应至关重要.
相关概念视频
02:29Hybrid Zones
16.9K
Hybrid zones are narrow regions where two closely related species interact, mate, and produce hybrids. Relative to either parent species, hybrids may possess distinct phenotypic or genetic differences that impact their survival and reproductive success. The genetic variances introduced by hybridization influence species diversity and speciation processes within the hybrid zone.
16.9K
01:20Mate Choice
8.0K
Mate choice—the decision about whom to mate with—is a type of natural selection, since animals must reproduce to pass down their genes. Mate choice is also called intersexual selection because the behavior occurs between the sexes.
8.0K
01:17What is a Species?
43.9K
Overview
43.9K
01:06Natural Selection and Mating Preferences
100
The principle of natural selection posits that organisms better adapted to their environment are more likely to survive and reproduce. This principle is closely intertwined with mating preferences, a key aspect of sexual selection, which evolutionary psychologists believe is driven by instincts to propagate one's genes. Such instincts significantly influence mating behaviors and preferences between genders.
Females, due to their biological roles in conception, pregnancy, and nursing,...
Females, due to their biological roles in conception, pregnancy, and nursing,...
100
02:39Predator-Prey Interactions
16.2K
Predators consume prey for energy. Predators that acquire prey and prey that avoid predation both increase their chances of survival and reproduction (i.e., fitness). Routine predator-prey interactions elicit mutual adaptations that improve predator offenses, such as claws, teeth, and speed, as well as prey defenses, including crypsis, aposematism, and mimicry. Thus, predator-prey interactions resemble an evolutionary arms race.
16.2K
02:04Conservation of Small Populations
13.1K
Small population sizes put a species at extreme risk of extinction due to a lack of variation, and a consequent decrease in adaptability. This weakens the chances of survival under pressures such as climate change, competition from other species, or new diseases. Large populations are more likely to survive pressures such as these, as such populations are more likely to harbor individuals that have genetic variants that are adaptive under new stresses. Small populations are much less...
13.1K