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The Journal of Heredity 1993:84(3):232-235
© 1993 The American Genetic Association 84:232-235

other

Homology Within the X Chromosomes of Boophilus microplus (Canestrini) and B. annulatus (Say)

S. J. Gunn, L. R. Hilburn, and B. S. Burbach

The University of Texas-Pan American, Department of Biology 1201 West University, Edinburg, TX 78539-2999
The Knipling-Bushland U.S. Livestock Insects Laboratory USDA-ARS, Kerrville, Texas

Abstract

Chromosome banding patterns of the X chromosomes of Boophilus annulatus (Say) and B. microplus (Canestrini) indicate considerable homology between the two species. All bands of the small X chromosome of B. microplus are represented in the large X chromosome of B. annulatus with the exception of one medially located dark band. A large region of material proximal to the centromere and a small segment located at the telomere of the larger X chromosome of B. annulatus are not represented in the small X chromosome of B. microplus. Meiotic abnormalities and the potential differentiation/evolution of the two X chromosomes are discussed. The extensive homology between the two species supports the genie data and linkage analyses previously published for these species.


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