中国科学家解密长臂猿濒危历史与长臂之谜|精品国产乱码久久久久久动漫
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中新社昆明11月8日电 (记者 韩帅南)记者8日从中国科学院昆明动物研究所获悉,由该所牵头、联合国内外多家科研机构组成的研究团队,通过对现存及灭绝长臂猿的大规模基因组测序与比较分析,系统阐明了长臂猿科的演化历程、种群动态及其标志性长臂表型的遗传基础,为全球长臂猿的保护行动提供新的科学见解。
长臂猿是与人类亲缘关系较近的小型猿类,以其独特的“臂行”运动方式、复杂的鸣唱行为、独特的配偶制以及严峻的濒危现状受到广泛关注。研究团队利用先进的基因组学技术,构建了全球范围内迄今最全面的长臂猿基因组数据集,覆盖了18个现存长臂猿物种。
研究团队通过创新的全基因组比对和溯祖分析方法,首次以确凿的基因组证据揭示了长臂猿科下四大属的演化关系为:(长臂猿属,(冠长臂猿属(合趾猿属,白眉长臂猿属)))。这一发现解决了长臂猿属级分类的百年难题。
研究还发现,在晚更新世时期(约10万至20万年前),大多数长臂猿物种经历了一次严重的种群瓶颈期,随后在约7万年前出现同步的种群恢复。这一动态与全球气候变化和海平面波动高度吻合,表明历史上气候变化是驱动长臂猿种群兴衰的关键因素。
同时,研究团队通过多物种比较基因组学分析,在长臂猿Sonic Hedgehog(SHH)基因的关键调控区内,识别出一个特异性缺失片段(长度为205个碱基对)。SHH基因是调控脊椎动物肢体发育的核心基因。研究团队通过功能实验证据表明,该结构变异可能在长臂猿四肢伸长演化过程中发挥了关键作用,为理解形态演化的遗传机制提供了重要案例。
该研究由中国科学院昆明动物研究所研究员吴东东、中国科学院古脊椎动物与古人类研究所研究员付巧妹和中山大学教授范朋飞共同领导。(完)
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