Zbornik - Društvo genetičara Srbije
Zbornik - Društvo genetičara Srbije
Zbornik - Društvo genetičara Srbije
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34 ZBORNIK ABSTRAKATA III KONGRESA GENETIÈARA SRBIJE I-Pos-13<br />
Subotica, 30. novembar - 4. decembar 2004.<br />
STEPEN HOMOZIGOTNOSTI INVERZIJA I INVERZIONIH KOMPLEKSA<br />
KOD Drosophila subobscura U USLOVIMA INBRIDINGA<br />
Gordana Rašiæ 1 , Marina Stamenkoviæ-Radak 1 i M. Anðelkoviæ 1,2<br />
1<br />
Biološki fakultet, Univerzitet u Beogradu, Beograd<br />
2<br />
Institut za biološka istraivanja «Siniša Stankoviæ», Beograd<br />
Genom Drosophila subobscura se odlikuje bogatim hromozomskim polimorfizmom paracentriènih<br />
inverzija i taj polimorfizam je najverovatnije u odreðenom stepenu adaptivan.<br />
U ovom radu izvršena je analiza efekata inbridinga na genetièku strukturu u okviru<br />
laboratorijskih populacija ove vrste poreklom sa razlièitih staništa. Cilj je bio utvrditi da<br />
li genetièki sistemi ispitivanih populacija utièu na brzinu dostizanja odreðenog stepena<br />
homozigotnosti genskih aranmana tokom kontinuiranog full-sib ukrštanja.<br />
Poreðene su uèestalosti pojedinaènih inverzija i inverzionih kompleksa izmeðu prirodnih<br />
populacija i 60 inbridingovanih linija. Za odreðene aranmane izraèunate su oèekivana<br />
homozigotnost i oèekivana stopa fiksacije. Dobijeni rezultati tumaèeni su sa ekološko-genetièkog<br />
aspekta.<br />
THE DEGREE OF HOMOZYGOSITY OF INVERSIONS AND INVERSION<br />
COMPLEXES IN Drosophila subobscura UNDER INBREEDING<br />
Genome of Drosophila subobscura is characterized by a rich chromosomal polymorphism<br />
of paracentric inversions and this polymorhism is most probably adaptive at certain<br />
degree.<br />
In this study, an analysis of the effects of inbreeding on genetic structure of laboratory<br />
populations of Drosophila subobscura from different habitats was carried out. Our aim<br />
was to determine whether the genetic systems of analyzed populations effect attainment<br />
of the degree of homozygosity of gene arrangements during continued full-sib mating.<br />
The frequencies of inversions and inversions complexes were compared between natural<br />
populations and 60 inbred lines. Expected homozygosity and fixation indexes were calculated<br />
for certain arrangements. The obtained results were discussed from ecological<br />
and genetical aspects.