[Genomic incompatibility in Drosophila virilis Sturt. X Drosophila lummei Hackman hybrids].
Genetic analysis of male sterility in Drosophila virilis x D. lummei hybrids was performed. It was shown that hybrid male sterility was caused mainly by incompatibility of sex chromosomes X and Y and homozygous chromosome 2 of D. virilis with other autosomes of D. lummei. Genes of chromosomes 3 and 5 enhanced sterility whereas genes of chromosome 4 suppressed its development. Factors controlling hybrid male sterility were demonstrated to have a recessive type of inheritance. At 17 degrees C, chromosome 6 of D. lummei was eliminated in F1 hybrids of the cross female D. virilis x male D. lummei. At 17 degrees C and 25 degrees C, sterility of the F1 hybrid males was 96% and 9%, respectively. Thus, two isolation mechanisms-elimination of chromosome 6 and male sterility-can simultaneously operate in F1. In addition to the region of the species-specific inversion In 1(a+b), factors controlling male sterility were mapped to the vermillion region of the X chromosome.
Falileeva
L I
LI
Mitrofanov
V G
VG
D000818:Animals; D002874:Chromosome Mapping; D003433:Crosses, Genetic; D004330:Drosophila / Q000235:genetics*; D005260:Female; D017344:Genes, Insect; D008040:Genetic Linkage; D016678:Genome; D006824:Hybridization, Genetic; D007248:Infertility, Male / Q000235:genetics*; D008297:Male; D014960:X Chromosome