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Molecular evidence of ribosomal DNA (rDNA) amplification of a minichromosome derived from Drosophila arizonae in D. mullen-D. arizonae hybrid males

 

 

Orillo LeonciniI; Francisco J. TovarI; Hermione E.M.C. BicudoII

IDepartamento de Genética, Instituto de Biologia, Universidade Federal do Rio de Janeiro (UFRJ), Caixa Postal 68011, 21944-970 Rio de Janeiro, RJ, Brasil. Send correspondence to O.L.
IILaboratório de Genética, Universidade Estadual Paulista (UNESP), Caixa Postal 136, 15010-210 São José do Rio Preto, SP, Brasil

 

 

ABSTRACT

We present data supporting cytogenetic observations on nucleolar dominance in hybrids between Drosophila arizonae and D. mulleri. Our approach was to compare the rDNA restriction patterns between the parental species and their hybrids. Results demonstrated that the minichromosome attached to the nucleolus in hybrid males is derived from D. arizonae.

Keywords: ribosomal DNA; minichromosome; Drosophila arizonae; D. mullen; D.arizonae; hybrid males.

 

 

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