Cytogenetic differentiation of natural populations of Chironomus obtusidens (Diptera, Chironomidae)

被引：0
|
作者：
Kiknadze, I. I. [1 ]
Istomina, A. G. [1 ]
Gunderina, L. I. [1 ]
机构：
[1] Russian Acad Sci, Siberian Div, Inst Cytol & Genet, Novosibirsk 630090, Russia
来源：
ZOOLOGICHESKY ZHURNAL | 2007年 / 86卷 / 08期
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D O I：
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中图分类号：
Q95 [动物学];
学科分类号：
071002 ;
摘要：
The cytogenetic structure of Siberian and European Chironomus obtusidens Goetgh. populations was studied. The clear differentiation of these populations was revealed using the quantitative analysis of sets and frequencies of inversion banding sequences. The Siberian populations were found to have six new inversion sequences, and the alternative obtG2 sequence dominated instead of the main obtG1 sequence typical for European populations. In general, chromosomal polymorphism was 3-4 times higher in the Siberian populations. Therefore, the cytogenic distances (Dcg) between the Siberian and European populations were higher (Dcg 0.059-0.097) than Dcg between the populations in each of the geographic zones investigated (Dcg 0-0.015). The HJ-phylo-genetic tree constructed for the chromosomal evolution of the genus Chironomus demonstrates that Chironomus obtusidens is the most divergent member among Palearctic species of the obtusidens group. In addition, it is closer related to the Nearctic decorus group.
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页码：921 / 932
页数：12
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