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Cytogenetic analysis of the Marsh Deer, Blastocerus dichotomus (Mammalia, Cervidae)

José Maurício Barbanti Duarte; Miriam Luz Giannoni

Departamento de Melhoramento Genético Animal, Faculdade de Ciências Agrárias e Veterinárias, UNESP, 14870-000 Jaboticabal, SP, Brasil. Send correspondence to J.M.B.D.

ABSTRACT

The chromosomic constitution of the Marsh Deer (Blastocerus dichotomus) was studied in 18 males and 18 females, mainly from the Tiete river basin in São Paulo State, Brazil. The species diploid number was determined to be 66 chromosomes and the fundamental number (FN), 74. The X and the Y were the largest and the smallest chromosome, respectively. Large amounts of the constitutive heterochromatin marked by the C band were located in the centromeric region of all the acrocentric chromosomes. The first chromosome pair was not marked and the second and third pairs showed weak centromeric markings. The X chromosome showed two strong telomeric markings while the Y was C band negative. Chromosomes four and five were the NOR carriers. Polymorphism for this band was observed in pair four. The results of this study are in agreement with other reports in the literature, in spite of the different origin of the animals.

Keywords: cytogenetic; Marsh Deer; Blastocerus dichotomus.

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