Chiasma repatterning across a chromosomal hybrid zone between chromosomal races of Mus musculus domesticus.
Chiasma number and distribution were analysed in male house mice from a karyotypic hybrid zone between the CD race (2n = 22) and the standard race (2n = 40) located in central Italy. Chiasma repatterning occurs across the transect. The overall trend produces a diminution of chiasmata in the mice with CD chromosomal background. The progressive reduction of chiasmata indicates that genes could pass from one race to another in an asymmetrical way: from metacentric races to the standard population.
Castiglia
Riccardo
R
Dipartimento di Biologia Animale e dell' Uomo, Università di Roma La Sapienza, Italy.
Capanna
Ernesto
E
D000818:Animals; D001854:Bone Marrow Cells / Q000166:cytology; D002478:Cells, Cultured; D002678:Chimera / Q000235:genetics; D002869:Chromosome Aberrations; D002871:Chromosome Banding; D002875:Chromosomes / Q000235:genetics*; D003434:Crossing Over, Genetic; D004171:Diploidy; D007558:Italy; D007621:Karyotyping; D008297:Male; D008540:Meiosis; D051379:Mice / Q000235:genetics*; D012730:Sex Chromosomes / Q000235:genetics; D014178:Translocation, Genetic