科研之友
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摘要
Multivariate morphometric studies are often carried out on different aphid taxa in order to analyze population variation and species discrimination in relation with different factors such as host plant, temperature and geography, which have significant effect on aphid morphology. The chrysanthemum aphid, Macrosiphoniella sanborni (Hemiptera: Aphididae), is a widespread pest on cultivated chrysanthemum throughout the world. In the present study 21 morphological characters in 11 populations of M. sanborni collected from several geographic locations in Iran were examined. Multivariate morphometric techniques, canonical variates analysis (CVA) and cluster analysis were used to determine whether these populations can be reliably morphologically discriminated. The results showed such discrimination between populations. The Kermanshah population (located in western Iran) clearly separated from other populations, indicating the presence of a morphologically distinct group. It could be concluded that presence of a geographic barrier and climatic conditions are among the most important factors which contribute to the differentiation between populations. Other complimentary studies such as genetic investigation will provide a better understanding of the evolutionary implications of the population structure.
- 出版日期2009-12
