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Acta Prataculturae Sinica ›› 2021, Vol. 30 ›› Issue (2): 166-177.DOI: 10.11686/cyxb2020199

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Comparative analysis of meat production traits, meat quality, and muscle nutrient and fatty acid contents between Ziwuling black goats and Liaoning cashmere goats

Ji-qing WANG(), Ji-yuan SHEN, Xiu LIU, Shao-bin LI, Yu-zhu LUO, Meng-li ZHAO, Zhi-yun HAO, Na KE, Yi-ze SONG, Li-rong QIAO   

  1. College of Animal Science and Technology,Gansu Key Laboratory of Herbivorous Animal Biotechnology,Gansu Engineering Lab of Genetic Improvement in Ruminants,Gansu Agricultural University,Lanzhou 730070,China
  • Received:2020-05-11 Revised:2020-09-24 Online:2021-02-20 Published:2021-01-19

Abstract:

Liaoning cashmere goats have been used since 1990 for crossbreeding to improve Ziwuling black goats in Qingyang, Gansu province. However, little is known whether there are differences in fatty acid and muscle nutrient contents of the two breeds that may affect the crossbreeding outcomes for Ziwuling black goats. To provide the theoretical information for use in crossbreeding improvement for Ziwuling black goats, differences between the two goat breeds in meat production capacity, meat quality, and the contents of muscle nutrients and fatty acids were analyzed. In this study, five healthy nine-month-old Ziwuling black goats and five Liaoning cashmere goats reared under the same management conditions were slaughtered to measure the carcass traits, including meat quality, fatty acid contents and muscle nutrient composition of the longissimus dorsi muscle, foreleg and hind leg muscles. The results showed that Ziwuling black goats had lower carcass weight, dressing out percentage, net meat weight, net meat production rate, rib-eye area, GR (grith rib) value, shear force and drip loss than those of Liaoning cashmere goats (P<0.05). However, the average meat lightness, chroma value, pH1 and pH24 in Ziwuling black goats were higher than those of Liaoning cashmere goats (P<0.01). Measurement of muscle nutrient composition revealed that the contents of water and crude ash of muscle in Ziwuling black goats were higher than Liaoning cashmere goats (P<0.05), but the contents of intramuscular fat and crude protein were lower than Liaoning cashmere goats. Eleven saturated fatty acids (SFAs), ten polyunsaturated fatty acids (PUFAs) and six monounsaturated fatty acids (MUFAs) were detected in muscle of both goat breeds, which mainly comprised palmitic acid, stearic acid, linoleic acid, cis-11, 14-eicosadienoic acid and oleic acid. The contents of SFA, PUFA, n-3 PUFA, n-6 PUFA and the PUFA∶SFA ratio in Ziwuling black goats were higher than Liaoning cashmere goats (P<0.01), but the MUFA content was lower than Liaoning cashmere goats (P<0.01). The results indicate that Liaoning cashmere goats had higher meat production capacity, but muscle from Ziwuling black goats had better meat quality and muscle nutritional composition, as well as a healthier fatty acid profile.

Key words: Ziwuling black goats, Liaoning cashmere goats, muscle nutrients, fatty acids, meat production performance, meat quality