{"title":"斜坡梯度下双皮藻的遗传和表观遗传变异——以亚热带淡水湖为例","authors":"Yixian Li , Xuyao Zhao , Manli Xia , Hongwei Hou","doi":"10.1016/j.aquabot.2023.103679","DOIUrl":null,"url":null,"abstract":"<div><p>Dynamic environmental factors can influence the genetic diversity and epigenetic variation of aquatic plants, thus accelerate the rate of species adaptations. <em>Trapa bispinosa</em> is an aquatic crop which is widely distributed in China and worldwide, yet little is known about the genetic and epigenetic variations of <em>T. bispinosa</em> in fishery and nature habitats. By using AFLP and MSAP, we analyzed the genetic and epigenetic variations of 27 <em>T. bispinasa</em> populations in a subtropical freshwater lake. A relative high level of genetic diversity (mean <em>H</em><sub>E</sub> = 0.312, <em>I</em> = 0.480, <em>PPL</em> = 54.90%) and epigenetic variation (mean e<em>H</em><sub>E</sub> = 0.351, e<em>I</em> = 0.531, e<em>PPL</em> = 67.84%) were detected. Besides, fishery habitats maintained relative higher epigenetic variations of <em>T. bispinosa</em> (<em>H</em><sub>E</sub> = 0.254, e<em>I</em> = 0.378, e<em>PPL</em> = 68.28%) than nature habitats (e<em>H</em><sub>E</sub> = 0.253, e<em>I</em> = 0.376, e<em>PPL</em> = 67.77%). Overall variations were basically distributed within populations (Ø<sub>ST</sub> = 0.260, <em>P</em> < 0.001). Bayesian analysis revealed a pattern of genetic structure consisting of two clusters among the populations. The Mantel regression of genetic and epigenetic variation against geographic distance did not reveal any correlations, but showed a correlative relationship with environmental variables (<em>r</em> = −0.47, <em>P</em> < 0.05). Specially, genetic diversity of <em>T. bispinosa</em> showed a positive correlation with slope aspect. These results indicated that habitat slope may shape the pattern of genetic variation in <em>T. bispinosa</em>, which further illustrated that even in a fine geographical scale, genetic diversity was unevenly distributed, restoration measurements for this aquatic crop should carefully take the habitat slope into account.</p></div><div><h3>Data accessibility</h3><p>All codes and polymorphism raw data are openly available from the Github repository: <span>https://github.com/yixian185/Data-for-Trapa</span><svg><path></path></svg>.</p></div>","PeriodicalId":8273,"journal":{"name":"Aquatic Botany","volume":null,"pages":null},"PeriodicalIF":1.9000,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Genetic and epigenetic variation of Trapa bispinosa under slope gradient: A case study in a subtropical freshwater lake\",\"authors\":\"Yixian Li , Xuyao Zhao , Manli Xia , Hongwei Hou\",\"doi\":\"10.1016/j.aquabot.2023.103679\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Dynamic environmental factors can influence the genetic diversity and epigenetic variation of aquatic plants, thus accelerate the rate of species adaptations. <em>Trapa bispinosa</em> is an aquatic crop which is widely distributed in China and worldwide, yet little is known about the genetic and epigenetic variations of <em>T. bispinosa</em> in fishery and nature habitats. By using AFLP and MSAP, we analyzed the genetic and epigenetic variations of 27 <em>T. bispinasa</em> populations in a subtropical freshwater lake. A relative high level of genetic diversity (mean <em>H</em><sub>E</sub> = 0.312, <em>I</em> = 0.480, <em>PPL</em> = 54.90%) and epigenetic variation (mean e<em>H</em><sub>E</sub> = 0.351, e<em>I</em> = 0.531, e<em>PPL</em> = 67.84%) were detected. Besides, fishery habitats maintained relative higher epigenetic variations of <em>T. bispinosa</em> (<em>H</em><sub>E</sub> = 0.254, e<em>I</em> = 0.378, e<em>PPL</em> = 68.28%) than nature habitats (e<em>H</em><sub>E</sub> = 0.253, e<em>I</em> = 0.376, e<em>PPL</em> = 67.77%). Overall variations were basically distributed within populations (Ø<sub>ST</sub> = 0.260, <em>P</em> < 0.001). Bayesian analysis revealed a pattern of genetic structure consisting of two clusters among the populations. The Mantel regression of genetic and epigenetic variation against geographic distance did not reveal any correlations, but showed a correlative relationship with environmental variables (<em>r</em> = −0.47, <em>P</em> < 0.05). Specially, genetic diversity of <em>T. bispinosa</em> showed a positive correlation with slope aspect. 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引用次数: 0
摘要
动态环境因子可以影响水生植物的遗传多样性和表观遗传变异，从而加快物种适应的速度。双皮藻是一种广泛分布在中国和世界各地的水生作物，但对双皮藻在渔业和自然生境中的遗传和表观遗传变异知之甚少。利用AFLP和MSAP分析了亚热带淡水湖27个褐皮蟹居群的遗传和表观遗传变异。具有较高的遗传多样性(平均HE = 0.312, I = 0.480, PPL = 54.90%)和表观遗传变异(平均eHE = 0.351, eI = 0.531, ePPL = 67.84%)。此外，渔业生境的双皮藻表观遗传变异(HE = 0.254, eI = 0.378, ePPL = 68.28%)高于自然生境(eHE = 0.253, eI = 0.376, ePPL = 67.77%)。总体变异基本分布在种群内(ØST = 0.260, P <0.001)。贝叶斯分析揭示了种群间由两个聚类组成的遗传结构模式。遗传变异和表观遗传变异与地理距离的Mantel回归没有显示出相关性，但与环境变量呈相关关系(r = - 0.47, P <0.05)。其中，坡向与遗传多样性呈显著正相关。这些结果表明，生境坡度可能会影响水草遗传变异的格局，进一步说明即使在良好的地理尺度下，水草遗传多样性的分布也是不均匀的，对水草的恢复措施也应考虑生境坡度的影响。数据可访问性所有代码和多态性原始数据都可以从Github存储库中公开获得:https://github.com/yixian185/Data-for-Trapa。
Genetic and epigenetic variation of Trapa bispinosa under slope gradient: A case study in a subtropical freshwater lake
Dynamic environmental factors can influence the genetic diversity and epigenetic variation of aquatic plants, thus accelerate the rate of species adaptations. Trapa bispinosa is an aquatic crop which is widely distributed in China and worldwide, yet little is known about the genetic and epigenetic variations of T. bispinosa in fishery and nature habitats. By using AFLP and MSAP, we analyzed the genetic and epigenetic variations of 27 T. bispinasa populations in a subtropical freshwater lake. A relative high level of genetic diversity (mean HE = 0.312, I = 0.480, PPL = 54.90%) and epigenetic variation (mean eHE = 0.351, eI = 0.531, ePPL = 67.84%) were detected. Besides, fishery habitats maintained relative higher epigenetic variations of T. bispinosa (HE = 0.254, eI = 0.378, ePPL = 68.28%) than nature habitats (eHE = 0.253, eI = 0.376, ePPL = 67.77%). Overall variations were basically distributed within populations (ØST = 0.260, P < 0.001). Bayesian analysis revealed a pattern of genetic structure consisting of two clusters among the populations. The Mantel regression of genetic and epigenetic variation against geographic distance did not reveal any correlations, but showed a correlative relationship with environmental variables (r = −0.47, P < 0.05). Specially, genetic diversity of T. bispinosa showed a positive correlation with slope aspect. These results indicated that habitat slope may shape the pattern of genetic variation in T. bispinosa, which further illustrated that even in a fine geographical scale, genetic diversity was unevenly distributed, restoration measurements for this aquatic crop should carefully take the habitat slope into account.
Data accessibility
All codes and polymorphism raw data are openly available from the Github repository: https://github.com/yixian185/Data-for-Trapa.
期刊介绍：
Aquatic Botany offers a platform for papers relevant to a broad international readership on fundamental and applied aspects of marine and freshwater macroscopic plants in a context of ecology or environmental biology. This includes molecular, biochemical and physiological aspects of macroscopic aquatic plants as well as the classification, structure, function, dynamics and ecological interactions in plant-dominated aquatic communities and ecosystems. It is an outlet for papers dealing with research on the consequences of disturbance and stressors (e.g. environmental fluctuations and climate change, pollution, grazing and pathogens), use and management of aquatic plants (plant production and decomposition, commercial harvest, plant control) and the conservation of aquatic plant communities (breeding, transplantation and restoration). Specialized publications on certain rare taxa or papers on aquatic macroscopic plants from under-represented regions in the world can also find their place, subject to editor evaluation. Studies on fungi or microalgae will remain outside the scope of Aquatic Botany.
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