基于几何形态测量学的五种稻蝗前后翅的形态变化研究

Geometric morphometric analysis of wing shape variation in five Oxya spp. grasshoppers

【目的】定量分析5种常见稻蝗属昆虫前后翅的形态变化规律。【方法】运用几何形态测量学方法对5种稻蝗雄性前、后翅进行量化分析,并结合主成分分析法(Principal component analysis,PCA)和薄片样条(Thin-plate spline,TPS)分析法探讨稻蝗前后翅的大小和形态变异。【结果】5种稻蝗前、后翅的大小和形态差异都比较显著,前、后翅的相似关系和5种稻蝗的系统发育关系一致。前翅差异的部位主要在缘前脉域、前缘脉域和臀脉域;后翅的差异主要在亚前缘脉域、前缘脉域及轭脉域。【结论】稻蝗前、后翅形态变化的几何形态测量学分析结果与稻蝗系统发育关系一致,可用于稻蝗属种的分类。稻蝗前、后翅发生变化的部位是其飞行时的受力部位,这些部位可以作为稻蝗物种分类特征。

[Objectives[ To conduct a quantitative study of wing shape variation in 5 grasshopper species of the genus Oxya. [Methods] Geometric morphometric methods, including landmarks, centroid size, principal component analysis, and thin-plate spline, were used to analyze wing shape variation. [Results] Wing size and wing shape were significantly different among the 50xya species, and the similarity of the fore and hind wing between different species is consistent with the phylogenetic relationships between them. The variable areas of the fore wing were the Precostal area, Costal area and Anal area, and the variable areas of the hind-wing were the subcostal area, costal area and jugal area. [Conclusionl Wing shape variation in Oxya species can be used can be used as taxonomic characters.