Population genetic variation, differentiation and bottlenecks of Dacrydium pectinatum (Podocarpaceae) in Hainan Island, China: implications for its conservation
Population genetic variation, differentiation and bottlenecks of Dacrydium pectinatum (Podocarpaceae) in Hainan Island, China: implications for its conservation
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中国海南岛罗汉松种群遗传变异、分化和瓶颈：对其保护的影响
DOI：
10.1071/bt09106
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发表时间：
2010-07
影响因子：
1.1
通讯作者：
Feng Deng
中科院分区：
文献类型：
--
作者：
Yingjuan Su;Ting Wang;Feng Deng
岛屿种群为研究驱动种群进化的力量提供了理想的自然实验。对中国海南岛的 17 个梳状 Dacrydium pectinatum de Laubenfels 种群的整个分布范围进行了采样，然后使用简单序列重复序列间 (ISSR) 标记进行评估。通过贝叶斯方法和传统方法估计群体遗传参数。通过执行三个杂合性过剩测试和模式转换指标测试，进一步剖析了遗传瓶颈特征。与其他针叶树种相比，梳状针叶树遗传变异水平较高，分化程度较低。此外，还发现了地方、区域以及大范围范围内的严重瓶颈。生态和生活史特征被认为在遗传变异模式的形成中发挥着重要作用。特别是，长寿命可能对现存种群的遗传变异和分化产生滞后效应。我们的研究结果可能有助于改善梳齿石斛恢复的管理实践。
Island populations provide an ideal natural experiment with which to study the forces driving population evolution. Seventeen populations of Dacrydium pectinatum de Laubenfels on Hainan Island, China, were sampled throughout its distribution range and then assessed using inter-simple sequence repeats (ISSR) markers. Population genetic parameters were estimated by Bayesian approaches as well as conventional methods. Genetic bottleneck signatures were further dissected by performing three heterozygosity excess tests and the mode-shift indicator test. Compared with other coniferous species, a relatively high level of genetic variation and a low degree of differentiation was revealed in D. pectinatum. In addition, severe bottlenecks were identified at local, regional as well as range-wide scale. Ecological and life-history traits were suggested to play major roles in the shaping of the genetic variation pattern. In particular, long life span could have exerted a lagging effect on both the genetic variation and differentiation of extant populations. Our findings may contribute to improving management practices for the restoration of D. pectinatum.
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影响因子：
3.3
作者：
J. K. Pritchard;Matthew Stephens;Peter Donnelly
通讯作者：
J. K. Pritchard;Matthew Stephens;Peter Donnelly
影响因子：
0.9
作者：
D. Norton;J. Herbert;A. E. Beveridge
通讯作者：
D. Norton;J. Herbert;A. E. Beveridge
DOI：
--
发表时间：
1998
期刊：
--
影响因子：
--
作者：
P. Grant
通讯作者：
P. Grant
DOI：
10.5962/bhl.title.79284
发表时间：
1859-11
期刊：
--
影响因子：
--
作者：
C. Darwin
通讯作者：
C. Darwin
影响因子：
2.2
作者：
Hamrick, J. L.;Godt, Mary Jo W.;Sherman-Broyles, Susan L.
通讯作者：
Sherman-Broyles, Susan L.