杜洛克与陆川猪正反交对后代繁殖性能和屠宰性能的影响

Effect of Reciprocal Cross with Duroc and Luchuan Pig on the Reproductive Performance and Slaughter Performance of the Offspring

研究旨在探索杜洛克猪和陆川猪正反交对后代繁殖性能和屠宰性能的影响,为杜洛克猪和陆川猪杂交系的选育工作提供依据。试验通过正交试验(杜洛克♂×陆川猪♀)和反交试验(陆川猪♂×杜洛克♀)分别获得杜陆猪(DL)和陆杜猪(LD),在杜陆猪和陆杜猪中分别进行横交试验,记录母猪的窝产仔数、窝产活仔数、产仔异常数、出生窝重、28日龄断奶数和28日龄断奶窝重等繁殖性能指标。并对杜陆猪和陆杜猪的胴体重﹑屠宰率﹑胴体长﹑背膘厚﹑眼肌面积、瘦肉率等屠宰性能指标进行测定。结果表明,正反杂交后代的繁殖性能、肉色和肉质嫩度显著优于杜洛克猪,屠宰性能指标显著高于陆川猪。在猪肉嫩度方面,陆杜猪显著优于杜陆猪。可见,杂交后代都同时遗传了陆川猪和杜洛克猪的优良性状,这为杜洛克猪与陆川猪的杂交系选育提供了依据。

The purpose of this study was to investigate the effect of reciprocal cross with Duroc and Luchuan pig on the re- productive performance and slaughter performance of the offsprings,and provides a basis for the breeding of hybrid system. By means of orthogonal （Duroc ♂×Luchuan ♀） and reciprocal cross （ Luehuan ♂×♀Duroc 9 ）,study acquired Du-Lu pig and Lu- Du pig respectively. Make athwart cross with Du-Lu pig and Lu-Du pig respectively, and record the reproductive perfor- mance indicators such as the litter size,litter number born alive, abnormal parturition number, birth litter weight, the wean- ing number of 28 days after born,and weaning weight of 28 days after born. Study measured carcass weight and length, dressing percentage, backfat thickness,eye muscle area and lean meat percentage of Du-Lu pig and Lu-Du pig according to the provisions of the Ministry of Agriculture. Results showed that the reproductive performance, flesh color and tenderness of the reciprocal cross offspring was significantly better than Duroc pigs, and the slaughter performance of the reciprocal cross offspring was significantly better than Luchuan pigs. And the tenderness of Lu-Du pigs was better than that of Du-Lu pigs. These results indicated that the crossbreds inherited the good traits of Duroc and Luchuan pigs at the same time, and the meat quality of Lu-Du pig was better than that of Du-Lu pigs.