研究采用7个微卫星标记分析在青海省西大滩区域,位于青藏公路两侧的4个高原鼠兔(Ochotona curzoniae)种群的遗传变异情况。分别采用软件TFPGA和GENE POP 3.4计算各种群间的Nei’s标准遗传距离,基因分化系数(Fst)等参数,并对遗传距离进行...研究采用7个微卫星标记分析在青海省西大滩区域,位于青藏公路两侧的4个高原鼠兔(Ochotona curzoniae)种群的遗传变异情况。分别采用软件TFPGA和GENE POP 3.4计算各种群间的Nei’s标准遗传距离,基因分化系数(Fst)等参数,并对遗传距离进行UPGMA聚类分析。研究结果表明,公路同侧种群间平均遗传距离和基因分化系数分别为0.0808和0.0541;异侧种群间平均遗传距离和基因分化系数分别为0.1037和0.0705,公路东侧和西侧的两个种群分别聚为一类。青藏公路对分布于公路两侧的高原鼠兔种群间的基因交流产生了一定的阻隔效应,并导致种群间出现了一定程度的遗传分化。展开更多
The sex ratio(♂/♀) of plateau pika′s(Ochotona curzoniae) population was studied by re-captured method in the region of the Haibei Alpine Meadow Ecosystem Research Station, Northwest Institute of Plateau Biology, th...The sex ratio(♂/♀) of plateau pika′s(Ochotona curzoniae) population was studied by re-captured method in the region of the Haibei Alpine Meadow Ecosystem Research Station, Northwest Institute of Plateau Biology, the Chinese Academy of Sciences from April of 2001 to August of 2002. The result showed that there was no significant difference from 1∶1 in adult′s sex ratio in whole breeding season,whereas the sex ratio of juvenile had some fluctuations among different age stages. The sex ratio of the second litter varied significantly from embryo to 60-day-old, but no difference at the first and the third litter. We concluded it was caused by conflict between maternal strategy and juvenile′s strategy. No significant differences of sex ratio were found both in adult and juvenile between 2001 and 2002. The sex ratio of plateau pika before and after overwintering did not vary. In summary, we proposed that sex ratio of plateau pika′s population was not influenced by exogenous factors, but some self-regulation mechanisms may be involved.展开更多
文摘研究采用7个微卫星标记分析在青海省西大滩区域,位于青藏公路两侧的4个高原鼠兔(Ochotona curzoniae)种群的遗传变异情况。分别采用软件TFPGA和GENE POP 3.4计算各种群间的Nei’s标准遗传距离,基因分化系数(Fst)等参数,并对遗传距离进行UPGMA聚类分析。研究结果表明,公路同侧种群间平均遗传距离和基因分化系数分别为0.0808和0.0541;异侧种群间平均遗传距离和基因分化系数分别为0.1037和0.0705,公路东侧和西侧的两个种群分别聚为一类。青藏公路对分布于公路两侧的高原鼠兔种群间的基因交流产生了一定的阻隔效应,并导致种群间出现了一定程度的遗传分化。
文摘The sex ratio(♂/♀) of plateau pika′s(Ochotona curzoniae) population was studied by re-captured method in the region of the Haibei Alpine Meadow Ecosystem Research Station, Northwest Institute of Plateau Biology, the Chinese Academy of Sciences from April of 2001 to August of 2002. The result showed that there was no significant difference from 1∶1 in adult′s sex ratio in whole breeding season,whereas the sex ratio of juvenile had some fluctuations among different age stages. The sex ratio of the second litter varied significantly from embryo to 60-day-old, but no difference at the first and the third litter. We concluded it was caused by conflict between maternal strategy and juvenile′s strategy. No significant differences of sex ratio were found both in adult and juvenile between 2001 and 2002. The sex ratio of plateau pika before and after overwintering did not vary. In summary, we proposed that sex ratio of plateau pika′s population was not influenced by exogenous factors, but some self-regulation mechanisms may be involved.