A pronounced sex difference when two linked loci of the Japanese brown frog Rana japonica are recombined.
To investigate the sex differences of crossing-over in Rana japonica, the recombination frequencies between two linked loci, LDH-B and MPI, were examined in offspring obtained from 29 matings involving either females or males heterozygous at both loci. No recombinants were found among 303 offspring bred from 6 heterozygous males, whereas 160 were parental and 138 were recombinants among 298 offspring bred from 9 heterozygous females. The recombination frequency was 46.3%. These results show that the sex difference when two loci were recombined was marked and significant in Rana japonica.
Sumida
M
M
Laboratory for Amphibian Biology, Faculty of Science, Hiroshima University, Japan.
Nishioka
M
M
D000483:Alleles; D000818:Animals; D003434:Crossing Over, Genetic; D004592:Electrophoresis, Starch Gel; D005260:Female; D008040:Genetic Linkage; D006579:Heterozygote; D007527:Isoenzymes; D007770:L-Lactate Dehydrogenase / Q000235:genetics; D008297:Male; D018482:Muscle, Skeletal / Q000201:enzymology; D011898:Ranidae / Q000235:genetics* / Q000502:physiology; D011995:Recombination, Genetic; D012727:Sex Characteristics
D007527:Isoenzymes; D007770:L-Lactate Dehydrogenase