Gangba sheep in the Tibetan plateau: Validating their unique meat quality and grazing factor analysis

Zhang, Qiangying; Que, Ming; Li, Wei; Gao, Shuang; Tan, Xin; Bu, Duo

doi:10.1016/j.jes.2020.06.024

Cited by 17 publications

(12 citation statements)

References 31 publications

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“…With the increase of temperature, the DTG curve showed two peaks, and the inflection points of the peaks were 85.8 °C and 311.8 °C respectively. In addition, with the increase of temperature, the DTA curve of amomum had a wide exothermic peak, the peak values were 103. trace elements (Jafari et al, 2021;Zhang et al, 2021), including Al, Ba, Co, Cr, Cu, Fe, K, Li, Mg, Mn, Na, Ni, Sc, Se, Sr and Zn, were obtained, as shown in Table 9. According to Table 9, the cumulative contribution rates of the first 4 main factors reached 100.00%, and the eigenvalues of the first 4 main correlation coefficient factors (λ > 0.6) were larger; The first 4 main factors contributed the most to the explanatory variables.…”

Section: ) Thermo Gravimetric Analysis Of Amomummentioning

confidence: 99%

Entropy analysis and grey correlation coefficient cluster analysis of multiple indexes of 5 kinds of condiments

et al. 2022

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Five condiments, including cinnamon, tangerine peel, clove, licorice, amomum, were selected as the research objects in Guangxi, China. The combustion heat, differential thermal gravimetric analysis, fat, crude fiber, trace element, calcium and ash content data for 5 condiments were determined. According to the combustion heat, differential thermal gravimetric analysis, fat, crude fiber, trace element, calcium and ash content data of condiments, we constructed a systematic multi-index comprehensive evaluation system using entropy analysis, gray pattern recognition and grey correlation coefficient cluster analysis. The multi-index comprehensive evaluation system established by the research provides a new idea for the nutritional evaluation of condiments. This research provides a strong scientific basis for the large-scale development of condiment resources and condiment classification research, basic support for the selection of condiment raw materials.

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Section: ) Thermo Gravimetric Analysis Of Amomummentioning

confidence: 99%

Entropy analysis and grey correlation coefficient cluster analysis of multiple indexes of 5 kinds of condiments

et al. 2022

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“…Due to these health benefits, the worldwide demand for high-quality mutton has dramatically increased in recent years. The Gangba sheep is an important local sheep breed in Tibet, whose meat is famous for flavor and high nutritional value due to the geographical isolation and unpolluted environment in the Tibetan Plateau (Zhang et al, 2021 ). As natural grazing is still the primary feeding process of Gangba sheep (Zhang et al, 2021 ), the total number and individual productivity of sheep cannot be fully developed due to the fragility of the Tibetan alpine grassland ecosystem and harsh environmental conditions.…”

Section: Introductionmentioning

confidence: 99%

“…The Gangba sheep is an important local sheep breed in Tibet, whose meat is famous for flavor and high nutritional value due to the geographical isolation and unpolluted environment in the Tibetan Plateau (Zhang et al, 2021 ). As natural grazing is still the primary feeding process of Gangba sheep (Zhang et al, 2021 ), the total number and individual productivity of sheep cannot be fully developed due to the fragility of the Tibetan alpine grassland ecosystem and harsh environmental conditions. Thus, there is an urgent need to improve high-quality mutton production while developing sustainable grassland ecosystems.…”

Section: Introductionmentioning

confidence: 99%

Different feeding strategies can affect growth performance and rumen functions in Gangba sheep as revealed by integrated transcriptome and microbiome analyses

et al. 2022

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Due to the harsh environment in the Tibetan Plateau, traditional grazing greatly limits the growth potential of local animals and causes severe ecosystem degradation. This is an urgent issue to be solved, which requires alternative strategies for grazing animals in the Tibetan alpine pastoral livestock systems. This study aimed to investigate the effects of different feeding strategies on growth performance and ruminal microbiota-host interactions in the local breed of sheep (Gangba sheep). Thirty 9-month old Gangba sheep (n = 10 per group) were assigned to natural grazing (G), semi-grazing with supplementation (T), and barn feeding (F) groups (supplementation of concentrate and oat hay) based on body weight. At the end of the experiment (75 d), all sheep were weighed, rumen fluid was obtained from six sheep per group, and ruminal epithelium was obtained from 3 sheep per group. The results showed that: (1) Compared with the G and T groups, the F group significantly increased dry matter intake, average daily gain, and feed conversion ratio of animals. Additionally, Gangba sheep in the F group had higher concentrations of ruminal short-chain volatile fatty acids (VFAs), especially propionate and butyrate (P <0.05) than sheep in the G and T groups. (2) The principal coordinates analysis indicated a significant difference in bacterial composition among different feed strategies. More specifically, the relative abundance of propionate (unidentified F082 and Succiniclasticum) and butyrate-producing (Eubacterium_coprostanoligenes_group) genera were also observed to be increased in the F group, in which unidentified F082 was identified as a differential biomarker among the three groups according to linear discriminant analysis effect size analysis. (3) The dynamics of the rumen epithelial transcriptome revealed that ECM-receptor interactions, focal adhesion, and PI3K-Akt signaling pathways, which are critical in mediating many aspects of cellular functions such as cell proliferation and motility, were upregulated in the F group. In conclusion, under harsh conditions in the Tibetan alpine meadow, barn feeding increased ruminal VFAs concentrations (especially propionate and butyrate), which stimulated gene expression related to cell proliferation in rumen epithelium, appearing to be superior to natural grazing and semi-grazing in gaining body weight of the local Gangba sheep.

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“…Public health policies indicate that the intake of SFAs should be decreased and the consumption of PUFAs should be increased in humans [ 3 ]. Mutton, an excellent source of essential micronutrients, contributes to physiological and biochemical functions in humans [ 4 ]. Mutton from sheep on the Qinghai-Tibet Plateau is a highly consumed meat product due to its meat flavor, high nutritional value, low levels of contaminants, and high UFA and protein contents.…”

Section: Introductionmentioning

confidence: 99%

Comparative Analysis of the Composition of Fatty Acids and Metabolites between Black Tibetan and Chaka Sheep on the Qinghai—Tibet Plateau

Guo

Wang

Zhang

et al. 2022

Animals

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The objective of this study was to investigate and compare fatty acids and metabolites in the longissimus dorsi muscle between Black Tibetan and Chaka sheep grazing in a highly saline environment. A total of eight castrated sheep (14 months old) with similar body weights (25 ± 2.2 kg) were selected. The experimental treatments included Black Tibetan (BT) and Chaka sheep (CK) groups, and each group had four replications. The experiment lasted for 20 months. All sheep grazed in a highly saline environment for the whole experimental period and had free access to water. The results showed that the diameter (42.23 vs. 51.46 μm), perimeter (131.78 vs. 166.14 μm), and area of muscle fibers (1328.74 vs. 1998.64 μm2) were smaller in Chaka sheep than in Black Tibetan sheep. The ash content in the longissimus dorsi was lower in Chaka sheep than in Black Tibetan sheep (p = 0.010), and the contents of dry matter (DM), ether extract (EE), and crude protein (CP) in the longissimus dorsi showed no differences (p > 0.05). For fatty acids, the proportions of C10:0, C15:0, and tC18:1 in the longissimus dorsi were higher in Chaka sheep than in Black Tibetan sheep (p < 0.05). However, all other individual fatty acids were similar among treatments, including saturated fatty acids (SFAs), unsaturated fatty acids (UFAs), monounsaturated fatty acids (MUFAs), polyunsaturated fatty acids (PUFAs), and the ratios of n-6 PUFAs to n-3 PUFAs and PUFAs to SFAs (p > 0.05). A total of 65 biomarkers were identified between the two breeds of sheep. Among these metabolites, 40 metabolic biomarkers were upregulated in the CK group compared to the BT group, and 25 metabolites were downregulated. The main metabolites include 30 organic acids, 9 amino acids, 5 peptides, 4 amides, 3 adenosines, 2 amines, and other compounds. Based on KEGG analysis, eight pathways, namely, fatty acid biosynthesis, purine metabolism, the biosynthesis of unsaturated fatty acids, renin secretion, the regulation of lipolysis in adipocytes, neuroactive ligand–receptor interaction, the cGMP-PKG signaling pathway, and the cAMP signaling pathway, were identified as significantly different pathways. According to the results on fatty acids and metabolites, upregulated organic acid and fatty acid biosynthesis increased the meat quality of Chaka sheep.

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Gangba sheep in the Tibetan plateau: Validating their unique meat quality and grazing factor analysis

Cited by 17 publications

References 31 publications

Entropy analysis and grey correlation coefficient cluster analysis of multiple indexes of 5 kinds of condiments

Entropy analysis and grey correlation coefficient cluster analysis of multiple indexes of 5 kinds of condiments

Different feeding strategies can affect growth performance and rumen functions in Gangba sheep as revealed by integrated transcriptome and microbiome analyses

Comparative Analysis of the Composition of Fatty Acids and Metabolites between Black Tibetan and Chaka Sheep on the Qinghai—Tibet Plateau

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