摘要
为了摸清国内梨形环棱螺的种质资源现状,提供下一步选择育种的优质种质资源材料。通过采集江苏、安徽、上海、山东、湖南、广西、江西、贵州、湖北、浙江、广东典型分布省份的249个野生样本,对不同群体的每个个体自壳顶开始顺时针设置24个地标点,并在第11~12、12~13、13~14、14~15、15~11、15~16个地标点之间等距设置15个半地标点。基于地标点和半地标点设置结果进行普氏叠印,并删除超过上四分位的异常值。采用薄板样条曲线法进行缺失值检查,并利用主成分分析对形态学变异进行分析。对不同地理群体的普氏距离进行方差分析并根据不同群体之间的普氏距离进行聚类分析。梨形环棱螺11个地理种群外部形态的主要变异位置是壳顶及螺口上缘。不同地理种群形态特征变异的集中性较差,第1主成分和第2主成分不能显著区别区分不同的群体。11个群体大致可以划分为长江流域群体和长江以南群体两大类。不同群体的外形特征存在显著差异,这种外形差异可能与当地的生境有关。
In order to investigate the current status of germplasm resources of the freshwater snail B.purificata in China and provide quality germplasm resource for selection breeding,249 samples were collected from wild populations in Jiangsu,Anhui,Shanghai,Shandong,Hunan,Guangxi,Jiangxi,Guizhou,Hubei,Zhejiang and Guangdong Provinces,24 landmark points were set clockwise from the top of the shell for each individual of different groups and 15 semi-landmark points were set at equal intervals between the 11th-12th,12-13th,13-14th,14-15th,15-11th,15-16th landmarks.After all the landmarks and semi-landmarks setting finished,Procrustes fitting was performed and the outliers that exceeding upper quartile were removed.The missing value was checked by thin plate spline method.All the variations of the shape of all species were subjected to principal component analysis.Procrustes distance for different geographical groups were analysis by ANOVA and these distances were used for cluster analysis.The results showed that the main variation of shell morphology in the 11 geographic populations of the freshwater snail B.purificata was at the top of the shell and the upper edge of the aperture.The concentration of variation in morphological traits of different geographical populations was poor,and the 1st principal component and 2nd principal component could not significantly distinguish among different populations.The 11 populations could be divided into two major groups,the Yangtze River basin group and the south of Yangtze River group,and there were significant differences in the shape of the different populations,which may be related to the local habitats.
作者
金武
马学艳
彭刚
陈琬雯
闻海波
JIN Wu;MA Xueyan;PENG Gang;CHEN Wanwen;WEN Haibo(Key Laboratory of Integrated Rice-Fish Farming Ecology,Ministry of Agriculture and Rural Affairs/Freshwater Fisheries Research Center,Chinese Academy of Fishery Sciences,Wuxi,Jiangsu 214081;Wuxi Fisheries College,Nanjing Agricultural University,Wuxi,Jiangsu 214128;Freshwater Fisheries Research Institute of Jiangsu Province,Nanjing 210017;Sino-US Cooperative Laboratory for Germplasm Conservation and Utilization of Freshwater Mollusks,Wuxi,Jiangsu 214081)
出处
《中国农学通报》
2024年第2期159-164,共6页
Chinese Agricultural Science Bulletin
基金
国家重点研发计划“中华绒螯蟹、克氏原螯虾、螺蛳大规格抗逆新品种培育”(2022YFD2400700)
中国水产科学研究院院级基本科研业务费“螺蛳规模化配套投喂与品质提升技术”(2021XT703)
中国水产科学研究院淡水渔业研究中心基本科研业务费“橄榄蛏蚌生长性状遗传参数估计”(2021JBFM07)
江苏现代农业(河蟹)产业技术体系建设专项资金(JATS[2021]412)。
关键词
梨形环棱螺
地理种群
几何形态
地标
半地标
Bellamya purificata
geographic populations
geometric morphometric
landmark
semi-landmark
