Matsuda Y, Imai H T, Moriwaki K, Kondo K, Bonhomme F
Cytogenet Cell Genet. 1982;34(3):241-52. doi: 10.1159/000131811.
The frequencies of X and Y chromosome dissociation in primary spermatocytes of wild-caught specimens of six Mus musculus subspecies, fifteen inbred mouse strains, and their F1 hybrids were examined. Three different types (I, II, and III) of X-Y dissociation were identified. Type I was found in inter-subspecies hybrids (BALB/c X M. m. molossinus, M. m. bactrianus, M. m. castaneus, or M. m. urbanus), in which the X-Y dissociation was less than 20% in each subspecies but 60-80% in the f1 hybrids. Type II was seen in the DBA/2J and DDK strains, in which the dissociation frequency was about 30% in the homozygous condition and increased up to 50% in inter-strain hybrids (C57BL/6J X DBA/2J or DDK). Type III found in the WB/Re strain also showed high dissociation frequency (51.1%) in the homozygous condition but the value was remarkably lower (11.3%) in C57BL/6J X WB/Re)F1s. Some asian wild mice seem to have type II or III as well as type I.
研究了6个小家鼠亚种的野生捕获标本、15个近交系小鼠及其F1杂种初级精母细胞中X和Y染色体解离的频率。鉴定出三种不同类型（I、II和III）的X-Y解离。I型见于亚种间杂种（BALB/c×小家鼠日本亚种、小家鼠阿富汗亚种、小家鼠印度亚种或小家鼠城市亚种），其中每个亚种的X-Y解离率低于20%，但在F1杂种中为60-80%。II型见于DBA/2J和DDK品系，在纯合状态下解离频率约为30%，在品系间杂种（C57BL/6J×DBA/2J或DDK）中增加到50%。在WB/Re品系中发现的III型在纯合状态下也显示出高解离频率（51.1%），但在C57BL/6J×WB/Re）F1中该值显著较低（11.3%）。一些亚洲野生小鼠似乎同时具有I型以及II型或III型。
