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Asian-Australas J Anim Sci > Accepted Articles
DOI: https://doi.org/10.5713/ajas.19.0105    [Accepted] Published online October 21, 2019.
Genetic parameter estimation for reproductive traits in QingYu pigs and comparison of carcass and meat quality traits to Berkshire ×QingYu crossbred pigs
Jia Luo1,2,*  , Yiting Yang1  , Kun Liao3  , Bin Liu1  , Yin Chen4  , An’an Jiang1  , Yihui Liu4  , Qiang Li4  , Jinyong Wang5  , Xuewei Li1  , Shunhua Zhang1  , Li Zhu1,* 
1College of Animal Science and Technology, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China
2College of Animal Science and Technology, Southwest University, Chongqing, 400715, China
3Bashan animal husbandry technology co., LTD, Tongjiang, Sichuan, 636700, China
4Sichuan Province General Station of Animal Husbandry, Chengdu, Sichuang, 610066, China
5Chongqing Academy of Animal Science, Rongchang, 402460, China
Correspondence:  Jia Luo, Tel: +86-15283524028, Fax: +86-15283524028, Email: 1028400278@qq.com
Li Zhu,Email: zhuli7508@ 163. com
Received: 4 February 2019   • Revised: 29 April 2019   • Accepted: 6 September 2019
Abstract: Objectives: The QingYu pig is well known for its excellent meat quality attributes in Sichuan province, China. In order to improve its production efficiency, the determination of genetic factors contributing to quantifiable economic traits of livestock is important. Moreover, the cross-breeding of QingYu pigs with western breeds possessing strong growth attributes is an efficient way to improve the performance of this breed. Methods: Here, the genetic parameters of several important reproductive traits of QingYu pigs were estimated. Furthermore, the effects of crossing Berkshire with QingYu (BQ) pigs on carcass and meat quality traits, as well as the effects of slaughter weight on carcass and meat quality of BQ were characterized. Results: QingYu pigs exhibited superior reproductive traits. The total number born (TNB) available to QingYu pigs was more than 8 parity. The observed repeatability of the reproductive traits of the QingYu pigs was between 0.10 and 0.23. The significantly correlated genetic and phenotypic of reproduction traits were consistent. Interestingly, the BQ pigs exhibited improved carcass quality, with a significant increase in loin muscle area, lean percentage and reduction in sebum percentage. As a result, BQ had higher L45min, lower cooking scores, and lower drip loss. In addition, the loin muscle area, body length, and sebum percentage were significantly higher in 90 and 100kg animals. Cooking loss showed a significant increase at 80kg, and marbling increased significantly from 90kg. Conclusion: The results of this study suggest that QingYu pigs exhibit excellent reproductive properties and heritability of these traits. Crossing with Berkshire is an efficient strategy to improve the carcass and meat quality of QingYu pigs for commercial operations. Furthermore, it appears as though the optimal slaughter weight of BQ pigs is at approximately 90kg.
Keywords: QingYu pig; Reproductive; Genetic parameter; Carcass and meat quality; Crossbred
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