{"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. 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":"188 ","pages":"Article 103679"},"PeriodicalIF":1.9000,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Aquatic Botany","FirstCategoryId":"99","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0304377023000645","RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MARINE & FRESHWATER BIOLOGY","Score":null,"Total":0}
引用次数: 0
Abstract
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.
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号
