Baimai V, Rattanarithikul R, Kijchalao U
Department of Biology, Faculty of Science, Mahidol University, Bangkok, Thailand.
J Am Mosq Control Assoc. 1993 Mar;9(1):59-67.
Metaphase karyotypes of 6 species of the Hyrcanus Species Group of the subgenus Anopheles show constitutive heterochromatin variation in X and Y chromosomes. Anopheles peditaeniatus exhibits the most extensive variation in the size and shape of heterochromatic sex chromosomes, with 3 types of X and 5 types of Y chromosomes. Anopheles nitidus shows the least variation, with only 2 types of X chromosomes. Anopheles sinensis and An. crawfordi each have 2 forms of metaphase karyotype in the heterochromatin of the Y chromosome. It is not known whether the 2 forms of metaphase karyotype in these 2 species represent inter- or intraspecific differences. The 2 forms of heterochromatic sex chromosomes observed in An. argyropus and An. nigerrimus may suggest the existence of sibling species complexes within each of these species.
按蚊亚属赫坎按蚊种团6个物种的中期核型显示，X和Y染色体存在组成型异染色质变异。多带按蚊的异染色质性染色体在大小和形状上表现出最广泛的变异，有3种类型的X染色体和5种类型的Y染色体。光腹按蚊的变异最小，只有2种类型的X染色体。中华按蚊和克劳福德按蚊在Y染色体异染色质中各有2种中期核型形式。尚不清楚这2个物种的2种中期核型形式代表种间差异还是种内差异。在银色按蚊和黑足按蚊中观察到的2种异染色质性染色体形式可能表明，在这两个物种中各自存在亲缘种复合体。
