高原鼢鼠种群历史动态研究  

Population History Dynamics of Plateau Zokor(Eospalax baileyi)

作　　者：唐利洲[1,2] 于龙[1] 陈建刚[1] 朱磊[1] 王俊杰[1] 丁伟[1] 苏建平[2] 

机构地区：[1]曲靖师范学院云贵高原生物多样性研究所,云南曲靖655011 [2]中国科学院西北高原生物研究所,高原生物适应与进化重点实验室,西宁810001

出　　处：《四川动物》2010年第5期521-526,共6页Sichuan Journal of Zoology

基　　金：中国科学院知识创新工程领域前沿项目(CXLY-2002-3);曲靖师范学院科研基金资助重点项目(2009ZD004)

摘　　要：利用细胞色素b基因序列作为分子遗传标记,分析了高原鼢鼠Eospalax baileyi整个分布区及4个地理种群历史动态变化。结果显示,0.33～0.16百万年前(Ma),该物种有效种群大小出现最高值与最低值,种群剧烈波动;0.16～0.08Ma,种群大小基本保持不变;0.08Ma至今,基本呈现缓慢下降趋势。结果充分说明倒数第二次冰期造成了高原鼢鼠有效种群大小的急剧下降或波动,间冰期有利于该物种种群数量稳定水平的维持,而末次冰期仅仅限制了有效种群大小的增加,并未导致种群崩溃或灭绝。The population dynamics of the entire distribution area and four geographical populations of plateau zokor（Eospalax baileyi）were studied by sequencing the cytochrome b gene.The results showed that the population fluctuated most tempestuously and the effective population size appeared the highest and the lowest between 0.33 and 0.16 million years ago（Ma）.The population size retained unviable stabilization levels between 0.16 and 0.08 Ma.In addition,the effective population size presented a slow shrinking without sudden increases or decreases from 0.08 Ma to now.These findings all suggest that the Penultimate Glaciation induced the sudden decreasing or fluctuation of the effective population size of this species.Furthermore,population size corresponding to stable levels happened during the interglacial stage,whereas,the Last Glaciation only restricted the increase of effective population size instead of resulting in population collapse or extinction.

关 键 词：高原鼢鼠 种群历史动态 有效种群大小 突变速率 冰期 

分 类 号：Q958[生物学—动物学]