家猪染色体13/17易位的发现及表型效应的研究——Ⅱ.家猪染色体13/17易位的表型效应

The Discovery of 13/17 Chromsome Translocation in Domestic Pig and Research on Its Phenotypic Effects Ⅱ. The Phenotypic Effects of 13/17 Chromsome Translocation in Domestic Pig

对13/17易位杂合子猪与同场同期同品种非易位猪的繁殖力、生长发育进行了统计分析.13/17易位杂合子公猪的窝产仔数、初生窝重、20日龄窝重、断奶窝重、窝断奶头数,无论纯繁还是杂交,与非易位猪均无显著性差异(P>0.05).13/17易位杂合子母猪作为杂交母本,其繁殖力与同场同期同品种非易位母猪无显著性差异(P>0.05).在13/17易位杂合子公猪的后裔中,13/17易位杂合子猪的20日龄重、断奶重都与非易位猪差异不显著(P>0.05).13/17易位杂合子公猪6月龄的体高显著高于非易位公猪的体高(P<0.05),但体重、体长和胸围均无显著性差异(P>0.05).13/17易位公猪的女儿与非易位公猪的女儿6月龄的体重与体尺也无显著性差异.本文还提出了对家畜染色体易位的育种措施.

The statistical analyses on fertility, growth and development between the heterozygous Landrace of 13/17 translocation and the non - translocation Landrace on the same farm were made by means of computer. As compared with the non - translocation boars and sows, there were no significant differences in the litter size, litter weight at 1 day and 20 days of age, litter weight and llitter size at weaning (P>0.05), which bred by either purebreeding or crossbreeding. Among the progenies of the boars carrying 13/17 translocation, the weights of the translocation carrier piglet at 20 days of age(5. 92±0. 85 kg) and at weaning (15. 70±3. 55) were all heavier than those of the non-translocation piglet (5. 88±1. 14 and 14. 89±3. 20 kg respectively), but it has no significant difference statistically. In addition, the withers height of boars carrying the translocation at 6 monthes of age was significantly higher than that of non -translocation boars at the same age (66. 75±0. 35 cm v. 57. 5±2. 12 cm; P<0. 05). It seems that there are, at least (if not at all) in such a case, no adverse effects but some advantages of translocation to the growth and development of the piglets with this chromsomal abnormality. The paper has also proposed some breeding measures of domestic animals with chromsome translocation.