临灭绝的Leontopithecus chrysomelas的ex situ种群中的遗传多样性及其对其保护的影响
Gabriela Guadalupe Aliaga-Samanez1, Nathalia Bulhões Javarotti1, Gisele Orecife1
1Departamento de Genética e Evolução, Universidade Federal de São Carlos, São Carlos, São Paulo, Brazil.
PloS one
|August 2, 2023
概括
囚禁的金头狮子 (GHLT) 显示了与野生种群相比的遗传多样性,但在100年内面临重大损失. 有效的管理正在保持异构性,但未来的战略对这个危灵长类动物至关重要.
科学领域:
- 保护遗传学 保护遗传学
- 灵长类生物学的灵长类生物.
- 动物学 动物学
背景情况:
- 金头狮子 (Leontopithecus chrysomelas) 是巴西大西洋森林的临灭绝的原生灵长类动物.
- 息地丧失严重减少了野生种群,需要采取现场保护措施.
- 囚禁种群对于保持遗传多样性和进化潜力至关重要.
研究的目的:
- 评估两个关键的巴西俘金头狮子鱼种群的遗传多样性和种群结构.
- 评估现有管理实践在现场保护中的有效性.
- 预测未来的遗传多样性趋势,并为保护战略提供信息.
主要方法:
- 微卫星基因造型被用来分析遗传变异.
- 用贝叶斯分析和主要坐标分析 (PCoA) 来确定人口结构.
- 进行了模拟,预测100年内遗传多样性丧失.
主要成果:
- 囚禁种群中的遗传多样性与其他Leontopithecus物种和先前研究的GHLT种群相似.
- 在里约热内卢灵长类学中心 (CPRJ) 和圣保罗动物公园基金会 (FPZSP) 种群之间观察到适度的遗传差异.
- 观察到的异构性超出了预期的异构性,这表明成功控制了内生育.
结论:
- 目前的管理实践有效地保持了被囚禁的金头狮子塔马林的异构性.
- 模拟预测,在下一个世纪内,遗传多样性将大幅减少,特别是在FPZSP种群中.
- 这些发现对于完善超群管理和整合L. chrysomelas的ex situ和in situ保护计划至关重要.
更多相关视频
相关概念视频
Conservation of Small Populations
13.2K
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...
13.2K
Conservation of Declining Populations
9.7K
Conservation of declining population focuses on ways of detecting, diagnosing, and halting a population decline. The approach uses methods to prevent populations from going extinct.
9.7K
Mutation, Gene Flow, and Genetic Drift
58.5K
In a population that is not at Hardy-Weinberg equilibrium, the frequency of alleles changes over time. Therefore, any deviations from the five conditions of Hardy-Weinberg equilibrium can alter the genetic variation of a given population. Conditions that change the genetic variability of a population include mutations, natural selection, non-random mating, gene flow, and genetic drift (small population size).
58.5K
Multi-species Conserved Sequences
4.0K
Next-generation sequencing technologies have created large genomic databases of a variety of animals and plants. Ever since the human genome project was completed, scientists studied the genome of primates, mammals, and other phylogenetically distant living beings. Such large-scale studies have provided new insights into the evolutionary relationship between organisms.
Although the genome of each species varies greatly from each other, a few sequences are highly conserved. Such conserved...
Although the genome of each species varies greatly from each other, a few sequences are highly conserved. Such conserved...
4.0K
Genetic Drift
39.9K
Natural selection—probably the most well-known evolutionary mechanism—increases the prevalence of traits that enhance survival and reproduction. However, evolution does not merely propagate favorable traits, nor does it always benefit populations.
39.9K
Gene Evolution - Fast or Slow?
7.2K
The genomes of eukaryotes are punctuated by long stretches of sequence which do not code for proteins or RNAs. Although some of these regions do contain crucial regulatory sequences, the vast majority of this DNA serves no known function. Typically, these regions of the genome are the ones in which the fastest change, in evolutionary terms, is observed, because there is typically little to no selection pressure acting on these regions to preserve their sequences.
In contrast, regions which code...
In contrast, regions which code...
7.2K


