Chromosomal polymorphism in Drosophila willistoni populations from Uruguay

Chromosomal polymorphism in natural populations of Drosophila willistoni from Uruguay and southern Brazil was investigated in order to understand the genetic characteristics and evolutionary potential of these almost geographically marginal populations. The level of chromosomal polymorphism in sampl...

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Published inGenetics and molecular biology Vol. 26; no. 2; pp. 163 - 173
Main Authors Valente, Vera Lúcia da Silva, Goñi, Beatriz, Valiati, Victor Hugo, Rohde, Cláudia, Morales, Nena Basílio
Format Journal Article
LanguageEnglish
Portuguese
Published Sociedade Brasileira de Genética 2003
Subjects
BIOCHEMISTRY & MOLECULAR BIOLOGY
chromosome inversion polymorphism
Drosophila willistoni
GENETICS & HEREDITY
Uruguayan natural populations
Brazil
Uruguay
Uruguayan natural populations
chromosome inversion polymorphism
Drosophila willistoni
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Summary:Chromosomal polymorphism in natural populations of Drosophila willistoni from Uruguay and southern Brazil was investigated in order to understand the genetic characteristics and evolutionary potential of these almost geographically marginal populations. The level of chromosomal polymorphism in samples from Uruguay was higher than in those from the southernmost Brazilian state of Rio Grande do Sul. The increase in the polymorphism of these populations, in which the species almost reaches its southern limit, contradicts the low level of paracentric inversion polymorphism expected under the central-marginal chromosomal polymorphism cline previously reported. The high frequency of some inversions and the presence of unique inversions in samples from Uruguay indicate the uniqueness of these populations.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
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ISSN:1415-4757
1678-4685
1415-4757
1678-4685
DOI:10.1590/S1415-47572003000200009