TAILIEUCHUNG - Báo cáo sinh học: "Chromosomal inversion polymorphism in 2 marginal populations of the endemic Hawaiian species, Drosophila silvestris"

Tuyển tập các báo cáo nghiên cứu về sinh học được đăng trên tạp chí sinh học Journal of Biology đề tài: Chromosomal inversion polymorphism in 2 marginal populations of the endemic Hawaiian species, Drosophila silvestris | Genet Sei Evol 1995 27 481-490 Elsevier INRA . . . 481 Original article Chromosomal inversion polymorphism in 2 marginal populations of the endemic Hawaiian species Drosophila Silvestris HL Carson1 EM Craddock2 1 University of Hawaii Department of Genetics and Molecular Biology John A Bums School of Medicine Honolulu HI 96822 2 State University of New York Division of Natural Sciences Purchase NY 10577-1400 USA Received 9 March 1995 accepted 30 August 1995 Summary - Chromosomal polymorphisms for 11 inversions from 2 demes of Drosophila Silvestris from the volcano Mauna Kea Island of Hawaii are distributed over 4 of the 5 major chromosome arms. These occur at frequencies from 2 to 70 . Seven of these inversions have been found widely distributed in other populations of this species. The 5 inversions in chromosome 4 were analyzed by a new method that permits the determination of haplotype frequencies of linked inversions and the scoring of genotypes formed by them. This variability appears to persist in a state of balanced polymorphism in these small isolated insular populations and is as great as or greater than that found in comparable demes of continental species. chromosomal variability small population island biology inversion Drosophila Silvestris Resume - Polymorphisme d inversion chromosomique dans 2 populations marginales de 1 espèce endémique hawa ienne Drosophila Silvestris. Des polymorphismes chromo-somiques concernant 11 inversions observées dans 2 dèmes de Drosophila Silvestris du Mauna Kea He de Hawai se répartissent sur 4 des 5 bras chromosomiques princi-paux. Leur frequence varie de 2 à 70 . Sept de ces inversions sont largement répandues dans d autres populations de cette espèce. Les 5 inversions du chromosome 4 ont été analysées selon une methode nouvelle qui permet de determiner les frequences haplotyp-iques d inversions liées et le repérage des genotypes qui en résultent. Cette variabilité qui semble persister sous forme d un polymorphisms .

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