Evolutionary dynamics of the karyotype of the wasp Trypoxylon (Trypargilum) nitidum (Hymenoptera, Sphecidae) from the Rio Doce State Park, Minas Gerais, Brazil

Genetics and Molecular Biology

Ricardo Scher²  Silvia Das Graças Pompolo¹ 

[1] ,Universidade Federal de Sergipe Departamento de Morfologia São Cristóvão SE ,Brazil

关键词: C-banding;    Trypoxylon nitidum;    karyotype evolution;   

DOI  :  10.1590/S1415-47572003000300015

来源: SciELO

【 摘 要 】

Cytogenetic analysis based on the distribution of C-bands showed two groups of karyotypes in a Trypoxylon nitidum population from the Rio Doce Park, State of Minas Gerais, Brazil. One of these groups, that was identical to a previously described karyotype (n = 15; 2n = 30), had a stable chromosome number and was rich in acrocentric chromosomes, whereas the other had a variable chromosome number (n = 12 to 14; 2n = 25 to 28) and was rich in pseudo-acrocentric chromosomes. We propose a hypothesis explaining the dynamics of the modifications which occurred in the karyotype of this species, based on the minimum interaction theory of Imai et al. (1986, 1988, 1994) and on the chromosome rearrangements and heteromorphisms observed by us.

【 授权许可】

CC BY   
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