Institute of Cytology and Genetics of the USSR Academy of Sciences, Novosibirsk, USSR.
Theor Appl Genet. 1978 Nov;53(6):261-4. doi: 10.1007/BF00280989.
Hybrids between wild and domestic pigs with two types of translocations in the karyotype were studied. The translocations of type I were first detected in a population of the Middle Asian wild boars. Type II was identified in a populations of the Central European subspecies. A large number of Middle Asian and Central European hybrids and their F1-F3 hybrids from crosses with domestic pigs were viable. By means of differential chromosome staining, the mechanism of the formation of 'synthetic' karyotypes, as well as some features of translocation inheritance, were established.The introduction of two translocations into a single genome and the same chromosome set of these hybrids not only modified chromosome number, but also the composition of the linkage groups. The hybrids heterozygous for two translocations and their hybrid progeny are characterized by an obligatory heterozygozity for a large number of genes, gene complexes and linked genes. It is suggested that this heterozygozity may be associated with heterotic events. The use of such hybrids in pig breeding may provide heterosis for viability and productivity.
我们研究了在染色体中具有两种易位类型的野猪和家猪的杂种。I 型易位首先在中亚野猪种群中被检测到，而 II 型易位则在中欧亚种的种群中被鉴定出来。大量的中亚和中欧杂种及其与家猪杂交的 F1-F3 杂种是有活力的。通过差异染色体染色，我们确定了“合成”核型的形成机制，以及易位遗传的一些特征。将两种易位引入单个基因组和这些杂种的相同染色体组不仅改变了染色体数量，还改变了连锁群的组成。两种易位杂合子及其杂种后代的特征是许多基因、基因复合物和连锁基因的强制性杂合性。有人认为这种杂合性可能与杂种优势有关。在猪的育种中使用这种杂种可能会为生存能力和生产力提供杂种优势。
