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烟蚜Myzus persicae是一种世界性的重要农业害虫。为探讨我国不同地理种群烟蚜形态特征变异情况,本研究测量了我国18个地理种群烟蚜的体长、体宽、头宽、各足腿节长、各足胫节长等18个形态性状度量特征和Q值,并进行方差分析和基于欧氏距离与地理距离和海拔差距的Mantel Test,利用各形态特征与体长的比值构成的比例特征进行系统聚类和主成分分析。结果表明:部分地理种群烟蚜的形态性状差异显著。系统聚类和主成分分析表明,18个烟蚜地理种群中贵州贞丰种群(ZF-GZ)与其他种群相比差异最大,陕西南泥湾(NNW-SX)、湖南慈利(CL-HN)、安徽谯城(QC-AH)和重庆武隆(WL-CQ)种群差异最小,其他种群间的差异程度介于这两者之间。Mantel Test显示欧氏距离与地理距离、海拔高度差距都不具有相关性。烟蚜种群的形态分化不符合地理隔离模式,地理气候条件对种群形态有一定影响,种群形态差异的形成是多种因素综合作用的结果,但具体作用机制尚不明确。
Myzus persicae is a worldwide pest of important agricultural pests. In order to explore the variation of morphological characteristics of Myzus persicae in different geographic populations in China, 18 morphological traits of 18 populations, including body length, body width, head width, length of each leg and tibia length, Measure features and Q values, and perform variance analysis and Mantel Test based on Euclidean distance and geographic distance and altitude disparity, and use the proportion features formed by the ratios of morphological characteristics to body length for cluster analysis and principal component analysis. The results showed that there were significant differences in the morphological traits of some populations of Myzus persicae. Phylogenetic analysis and principal component analysis showed that among the 18 populations of Aphids, Zhenfeng population (ZF-GZ) had the most significant difference from other populations. Among them, NNW-SX and CL-HN ), The lowest among QC-AH (Anhui) and WL-CQ (Chongqing), and the other between the two populations. Mantel Test shows no correlation between Euclidean distance and geographic distance, altitude disparity. The morphological differentiation of the population of Myzus persicae did not fit the pattern of geographical isolation, and the climatic and climatic conditions had some effects on the population morphology. The formation of population morphological differences was the result of the combination of many factors, but the specific mechanism of action was not clear.