Strong Genetic Structure Observed in Primulina danxiaensis, a Small Herb Endemic to Mount Danxia With Extremely Small Populations.
Strong Genetic Structure Observed in Primulina danxiaensis, a Small Herb Endemic to Mount Danxia With Extremely Small Populations.
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在丹霞报春花中观察到强大的遗传结构，这是一种丹霞山特有的种群极小的小草本植物
DOI：
10.3389/fgene.2021.722149
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发表时间：
2021
影响因子：
3.7
通讯作者：
Fan Q
中科院分区：
文献类型：
--
作者：
Chen S;Guo W;Chen Z;Liao W;Fan Q
丹霞地貌是我国南方零星分布的一种独特的岩石地貌类型。它培育了大约400种珍稀或濒危动植物物种，其多样性，特有性和保护越来越引起科学和公众的关注。其中丹霞报春（Primulina danxiaensis（W. B。Liao，S. S. Lin，和R. J. Shen）W. B。Liao和K. F. Chung是一种小型多年生草，仅在丹霞山有记录，丹霞山是中国丹霞的一部分，是世界自然遗产。本研究采用限制性内切酶位点相关DNA测序（RAD-seq）技术对丹霞山龙眼12个居群的遗传多样性进行了研究。在94个样本的84，779个位点中共检测到432，041个变异位点。预期杂合度（HE）为0.017 ~ 0.139。Tajima's D检验表明，大多数位点都处于近期正选择状态，其中一个正选择位点被标记为tRNAGlu，这可能与该物种对阴湿环境的适应有关。结构分析和系统发育树分析表明，12个丹霞山龙眼居群可分为4个基因库（分支），遗传距离与地理距离呈显著相关。结果表明，丹霞山分布着零星分布的丹霞山云杉，其遗传多样性处于中等水平，居群结构较强，地理距离可能是限制丹霞山云杉居群间基因流动的重要因素。
Danxia landform occurring sporadically in southern China is a unique type of petrographic geomorphology. It has nurtured about 400 rare or threatened plant and animal species, whose diversity, endemism, and conservation have called increasing scientific and public attentions. Among them, Primulina danxiaensis (W. B. Liao, S. S. Lin, and R. J. Shen) W. B. Liao and K. F. Chung is a tiny perennial grass species recorded only in Mount Danxia, a natural World Heritage Site as part of China’s Danxia. In this study, restriction site-associated DNA sequencing (RAD-seq) was performed to investigate genetic diversity among these 12 populations of P. danxiaensis. A total of 432,041 variant sites were detected in 84,779 loci across 94 samples. The expected heterozygosity (H E ) ranged from 0.017 to 0.139. Bottleneck signals were detected in most populations, Tajima’s D tests showed that most loci could be under recent positive selection, and one of the six positively selected loci identified by BayeScan was annotated as tRNAGlu, which may contribute to the species’ adaptation to shady environment. STRUCTURE analysis and phylogenetic tree showed that the 12 populations of P. danxiaensis could be divided into four gene pools (clades) corresponding to their geographic locations, and significant correlation was observed between genetic and geographic distances. Our study demonstrated that P. danxiaensis maintained a middle level of genetic diversity and strong population structure; geographic distance could be an important factor limiting gene flow among populations of P. danxiaensis, which were only sporadically recorded in Mount Danxia.
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影响因子：
3.7
作者：
Baird NA;Etter PD;Atwood TS;Currey MC;Shiver AL;Lewis ZA;Selker EU;Cresko WA;Johnson EA
通讯作者：
Johnson EA
野生枇杷（Eriobotrya japonica）与其近缘枇杷自然杂交的分子证据
影响因子：
5.3
作者：
Fan Q;Chen S;Li M;Guo W;Jing H;Wu W;Zhou R;Liao W
通讯作者：
Liao W
影响因子：
9.2
作者：
Chang CC;Chow CC;Tellier LC;Vattikuti S;Purcell SM;Lee JJ
通讯作者：
Lee JJ
气温波动和东亚季风推动了中国南方喀斯特生态系统的植物多样化
影响因子：
4.9
作者：
Kong, Hanghui;Condamine, Fabien L.;Kang, Ming
通讯作者：
Kang, Ming
影响因子：
2.9
作者：
Cai, Mengying;Wen, Yafeng;Tsumura, Yoshihiko
通讯作者：
Tsumura, Yoshihiko