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Title: Constitutive Heterochromatin Differentiation and Evolutionary Divergence of Karyotype in Oriental Anopheles (Cellia) 
Author: Baimai, Visut
Date: 1988
Publisher: University of Hawaii Press
Citation: Baimai V. 1988. Constitutive heterochromatin differentiation and evolutionary divergence of karyotype in oriental Anopheles (Cellia). Pac Sci 42(1-2): 13-27.
Abstract: Analysis of the mitotic karyotype of two clusters of closely related
species of oriental Anopheles, the A . balabacensis and A. maculatus complexes,
has revealed interspecific differences in the amount and distribution of
constitutive heterochromatin, particularly in sex chromosomes. Such a qualitative
diagnosis of heterochromatin is useful in identification of these sibling
species. The cytological evidence indicates a significant role of heterochromatin
in chromosomal evolution of anopheline mosquitoes. The novel heterochromatin
differentiation in sex chromosomes suggests an evolutionary role in the
process of species divergence. Furthermore, extensive intraspecific variations
of sex chromosome heterochromatin have been observed in natural populations
of A . dirus A and B, while chromosomal rearrangement is very rare , if not
absent. The gross heterochromatin variation may be correlated with variability
in vectorial capacity, which may reflect its functional significance in coevolutionary
ISSN: 0030-8870

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