title: The Breed and Sex Effect on the Carcass Size Performance and Meat Quality of Yak in Different Muscles.
abstract: The carcass size performances and the meat quality of Gannan and Sibu yak were determined using M. supraspinatus (SU), M. longissimus thoracis (LT) and M.quadriceps femoris (QF). It is found that Sibu yak had significantly higher carcass weight (CW) than Gannan yak with difference of nearly 40 kg, as well as significantly higher eye muscle area (EMA), carcass thorax depth (CTD), round perimeter (RP), etc. The carcass performances of steer yak were significantly higher than heifer yak except meat thickness at round (MTR) (p<0.05). The results show that both yak breed and gender had significant effects on carcass performances. It could be seen that the variation of carcass size performances from breeds is as large as from gender (50.22% and 46.25% of total variation, respectively) through principal component analysis (PCA). Sibu yak had significantly higher L*, b*, WBSF, cooking loss and Fat content, while Gannan yak had significantly higher a*, press loss, protein content and moisture (p<0.05). Yak gender and muscle had insignificant effects on meat colour and water holding capacity (p>0.05). The variation of meat quality of yak from breed is up to 59.46% of total variation according to PCA. It is shown that the difference between breeds, for Gannan yak and Sibu yak, plays an important role in carcass size performance and meat quality.
authors.affiliation: College of Food Science and Engineering, Gansu Agriculture University, Lanzhou 730070, China.
authors.forename: Li
authors.initials: L
authors.lastname: Zhang
authors.affiliation: Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, China.
authors.forename: Baozhong
authors.initials: B
authors.lastname: Sun
authors.affiliation: College of Food Science and Engineering, Gansu Agriculture University, Lanzhou 730070, China.
authors.forename: Qunli
authors.initials: Q
authors.lastname: Yu
authors.affiliation: Tibet Institute of Animal Husbandry, Lhasa 850000, China.
authors.forename: Qiumei
authors.initials: Q
authors.lastname: Ji
authors.affiliation: Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, China.
authors.forename: Peng
authors.initials: P
authors.lastname: Xie
authors.affiliation: Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, China.
authors.forename: Haipeng
authors.initials: H
authors.lastname: Li
authors.affiliation: College of Food Science and Engineering, Gansu Agriculture University, Lanzhou 730070, China.
authors.forename: Li
authors.initials: L
authors.lastname: Wang
authors.affiliation: College of Food Science and Engineering, Gansu Agriculture University, Lanzhou 730070, China.
authors.forename: Yuchun
authors.initials: Y
authors.lastname: Zhou
authors.affiliation: College of Food Science and Engineering, Gansu Agriculture University, Lanzhou 730070, China.
authors.forename: Yongpeng
authors.initials: Y
authors.lastname: Li
authors.affiliation: Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, China.
authors.forename: Caixia
authors.initials: C
authors.lastname: Huang
authors.affiliation: Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, China.
authors.forename: Xuan
authors.initials: X
authors.lastname: Liu
keywords: Gannan; Sibu; carcass size performance; meat quality; yak