Local adaptation to temperature and precipitation in naturally fragmented populations of Cephalotaxus oliveri, an endangered conifer endemic to China.
Local adaptation to temperature and precipitation in naturally fragmented populations of Cephalotaxus oliveri, an endangered conifer endemic to China.
复制标题
中国特有的濒危针叶树粗榧自然分散种群对温度和降水的局部适应
DOI：
10.1038/srep25031
复制
发表时间：
2016-04-26
影响因子：
4.6
通讯作者：
Su Y
中科院分区：
文献类型：
--
作者：
Wang T;Wang Z;Xia F;Su Y
橄榄头杉是中国特有的濒危第三纪残存针叶树。该物种在从西到东的不同气候条件下广泛生存。降水和温度是影响碳分布的主要制约因素。奥利维。为了进一步了解适应进化对气候变化的机制，利用ISSR标记检测适应进化位点，确定温度和降水变化与适应位点的关系，并对22℃的遗传结构进行研究。oliverinatural人群。共鉴定出14个异常位点，其中5个与温度和降水相关。在离群位点中，连锁不平衡（LD）较高（42.86%），这也为选择提供了强有力的证据。此外,C。橄榄树具有较高的遗传变异率（93.31%）和群体分化率（93.31%），这可能为其进化提供原料，也可能加速其局部适应。生态位模型显示，全球变暖将导致c种群的变化。奥利维亚由南向北与南部地区缩小。研究结果有助于了解针叶树对气候变化的潜在响应，并为针叶树资源管理和保护策略提供新的见解。
Cephalotaxus oliveriis an endangered tertiary relict conifer endemic to China. The species survives in a wide range from west to east with heterogeneous climatic conditions. Precipitation and temperature are main restrictive factors for distribution ofC. oliveri. In order to comprehend the mechanism of adaptive evolution to climate variation, we employed ISSR markers to detect adaptive evolution loci, to identify the association between variation in temperature and precipitation and adaptive loci, and to investigate the genetic structure for 22C. oliverinatural populations. In total, 14 outlier loci were identified, of which five were associated with temperature and precipitation. Among outlier loci, linkage disequilibrium (LD) was high (42.86%), which also provided strong evidence for selection. In addition,C. oliveripossessed high genetic variation (93.31%) and population differentiation, which may provide raw material to evolution and accelerate local adaptation, respectively. Ecological niche modeling showed that global warming will cause a shift for populations ofC. oliverifrom south to north with a shrinkage of southern areas. Our results contribute to understand the potential response of conifers to climatic changes, and provide new insights for conifer resource management and conservation strategies.