九种蝗虫核型似近系数的聚类分析研究

CLUSTER ANALYSIS OF THE KARYOTYPE RESEMBLANCENEAR COEFFICIENTS OF NINE LOCUST SPECIES

应用核型似近系数聚类分析方法，研究了小稻蝗Ｏｘｙａｈｙｌａｉｎｔｒｉｃａｔａ、山稻蝗Ｏ．ａｇａｖ－ｉｓａ、上海稻蝗Ｏ．ｓｈａｎｇｈａｉｅｎｓｉｓ、无齿稻蝗Ｏ．ａｄｅｎｔａｔａ、中华稻蝗Ｏ．ｃｈｉｓｅｎｓｉｓ、日本稻蝗Ｏ．ｊａｐｏｎｉｃａ、短额负蝗Ａｔｒａｃｔｏｍｏｒｐｈａｓｉｎｅｎｓｉｓ、奇异负蝗Ａ．ｐｅｒｇｒｉｎａ和日本蚱Ｔｅｔｒｉｘｊａｐｏｎｉｃａ等９种蝗虫的亲缘关系。结果显示，９种蝗虫分为３类：稻蝗，负蝗和蚱。６种稻蝗之间的核型似近系数（λ）在０．９６１～０．５６９５之间，２种负蝗的λ＝０．５８６７，日本蚱与这８种蝗虫的λ在０．５３１８～０．０３２２。聚类图直观地反映出它们的亲缘关系与形态分类学的分类结果相一致。从９种蝗虫的核型演化上看，日本蚱是较原始的类型，负蝗分化也较早，而稻蝗则是较进化的类型。

By applying cluster analysis of karyotype resemblancenear coefficients (λ), we have studied the phylogenetic relation of Oxya hyla intricata,O.agavisa,O.Shanghaiensis,O.adentata,O.chisensis,O.japonica,Atractomorpha sinensis,A.pergrina and Tetrix japonica.Results show that the 9 locust species can be roughly divided into three categories:Oxya,Atractomorpha and Tetrix.For the 6 Oxya species,their karyotype resemblancenear coefficients (λ) range from 09610 to 05695. For the two Atractomorpha, the λ is 05867.For T.japonica and the other locusts it ranges from 05318 to 00322.The cluster figure reflects objectively that they are consistent to their phylogenetic relation and the result of the morphological systematics.From the evolution of the karyotypes of the 9 locust species,we consider that Tetrix japonica is the most ancient type,Atractomorpha is also of early differentiation and Oxay is of the most recent evolutional type.