Open AccessRecombination in the region between the marker forked and the centromere in inbred Drosophila melanogaster XX and XXY females
Author(s) -
PALMGREN BJÖRN
Publication year - 1990
Publication title -
hereditas
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.819
H-Index - 50
eISSN - 1601-5223
pISSN - 0018-0661
DOI - 10.1111/j.1601-5223.1990.tb00067.x
Subject(s) - centromere , recombination , biology , drosophila melanogaster , chromosome , genetics , hybrid , inbred strain , botany , gene
Recombination in the proximal X chromosome interval (forked‐centromere) has been studied in hybrids from two inbred lines of Drosophilu melanogaster . Attached Y S y + arms or the proximal region of the Dp (1:1) sc vl y + were used as markers of the centromere. A derived Y chromosome (B S Y K ) induced a reduction of the recombination frequency in only one of five comparative experiments of XXB S Y K and XX females. In two of the tests there was a higher frequency of recombination in the presence of the B S Y K . This is not consistent with a competitive preexchange XX and XY association, which according to a generally accepted idea should result in an inevitable decrease in recombination. This is considered as further evidence for non‐random Y distribution at regular X disjunction being determined after exchange.