The effect of feeding system in the expression of genes related with fat metabolism in semitendinous muscle in sheep

Dervishi, Elda; Serrano, Carmen; Joy, M.; Serrano, Malena; Rodellar, Clementina; Calvo, J.H.

doi:10.1016/j.meatsci.2011.04.003

Cited by 77 publications

(64 citation statements)

References 51 publications

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“…Zel lambs had a higher proportion of oleic acid which may indicate higher activity of stearoyl-CoA desaturase. It has been shown that changes in the gene expression and activity of this enzyme could be important factors influencing differences in fatty acid composition in lamb meat (Dervishi et al, 2011). In our study there was also a negative correlation between oleic and linoleic acids which is in agreement with Harris (1997).…”

Section: Discussionsupporting

confidence: 88%

“…In our study, fat-tailed Chall lambs, had more desirable n−6:n−3 PUFA ratios. The dietary recommendation for the n−6:n−3 PUFA ratio is 4 or less (Dervishi et al, 2011;Lee, Fukumoto, Nishida, Ikeda, & Sugano, 1989;Raes, De Smet, & Demeyer, 2004). In the current study fat-tailed Chall lambs, also had a more favorable ratio of P:S (0.19± 0.01, Table 5), which is probably correlated with their lower IMF levels.…”

Section: Discussionmentioning

confidence: 99%

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Comparison of the meat quality and fatty acid composition of traditional fat-tailed (Chall) and tailed (Zel) Iranian sheep breeds

et al. 2012

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Section: Discussionsupporting

confidence: 88%

Section: Discussionmentioning

confidence: 99%

Comparison of the meat quality and fatty acid composition of traditional fat-tailed (Chall) and tailed (Zel) Iranian sheep breeds

et al. 2012

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“…Animals fed 36 days had higher values for C18:19, C18:2C9C12, this result might be explained by less time on feed with high content of grain. Average ω6:ω-3 was 24%, ideally, this ratio should be less than 4 and should not exceed 25 (Wood et al, 2003, Dervishi et al, 2011, Aferri et al, 2012. Diets high in grains, for example corn, can increase the ω6 and polyunsaturated acids changing the flavor and smell.…”

Section: Resultsmentioning

confidence: 99%

<b>Time on feedlot and sexual effects on animal performance and characteristics of lamb’s meat

Mazon

Carvalho

Pesce

et al. 2017

Acta Sci. Anim. Sci.

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ABSTRACT. For this research 48 male lambs were divided in randomized blocks in a factorial design, having as factors sexual condition (castrated or uncastrated) and time on feed (36 or 78 days). High grain diet was monitored daily to measure the performance of the animal nutrition. The characteristics of the carcass and meat were taken for the fatty acids profile and sensorial analysis. The effect of the factors as sexual condition and time on feed, and the interaction between them, were evaluated by analysis of variance using the GLM procedure of SAS software and the treatment averages were compared by Student's T test. The uncastrated animals presented greater weight gain and dry matter intake, better feed efficiency, and larger loin area. More time on feed resulted in higher weight at slaughter. Parameters such as pH, color, meat tenderness and sensorial attributes were not affected by treatments. For the fatty acid profile there was effects and interactions between sexual condition and time on feed. It is concluded that castration should not be used when the animal is young and slaughtered and feed intensively, but neutering can be interesting to improve the fatty acid profile of the meat.Keywords: castrated, Dorper, fatty acids, meat, Santa Inês, sheep.Período de confinamento e efeito do sexo sobre o desempenho e características de qualidade da carne de cordeiros RESUMO. No experimento realizado, foram utilizados 48 cordeiros machos divididos em blocos casualizados, em esquema fatorial, sendo tais fatores: a condição sexual (castrado ou não castrado) e tempo de confinamento (36 ou 78 dias). Uma dieta rica em grãos foi ofertada e controlada diariamente para medir o desempenho da nutrição animal, as características da carcaça e da carne foram avaliadas, e foi feita análise sensorial. A condição sexual e o tempo em confinamento, bem como a interação entre eles, foram avaliados por análise de variância, utilizando o procedimento GLM do software SAS e as médias dos tratamentos foram comparadas pelo teste t de estudante (p < 0,05). Os animais não castrados apresentaram maior ganho de peso e consumo de matéria seca. Eles também tiveram uma melhor eficiência alimentar e área de lombo. Mais tempo no confinamento resultou em maior peso ao abate. Parâmetros como pH, cor, maciez da carne e atributos sensoriais não foram afetados pelos tratamentos. Para o perfil de ácidos graxos, houve efeitos e as interações entre condição sexual e tempo de confinamento. Concluiu-se que a castração não deve ser usada quando o animal é novo e criado em sistema intensivo, mas a castração pode ser interessante para melhorar o perfil de ácidos graxos da carne.

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“…Co., Harbin, China) [7]. After chilling of the carcasses for 24 h, longissimus lumborum muscles were isolated to evaluate the drip loss using the method described previously [8] with some modifications: muscle samples standardized for surface area (5 Â 3 Â 2.5 cm 3 ) were suspended in an inflated plastic bag for 24 h at 48C [9]. IMF content was evaluated using the Soxhlet petroleum-ether extraction method.…”

mentioning

confidence: 99%

Differential expression of meat quality and intramuscular fat deposition related genes in Hanjiang black pigs

Wu¹,

Shi²,

Zhou³

et al. 2014

ABBS

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Hanjiang black pig is an ancient local porcine breed of Shaanxi Province. They are categorized into two types, small-eared Hanjiang black pig and big-eared Hanjiang black pig, according to the size of their ears ( Supplementary Fig. S1). Big-eared Hanjiang black pig is regarded as the fat type, whereas small-eared Hanjiang black pig is the lean type [1]. There was no study on the meat quality of these two types of Hanjiang black pig. In the pig industry, intramuscular fat (IMF) content affects multiple meat quality characteristics, such as tenderness, juiciness, and flavor level [2]. The underlying mechanisms of IMF deposition could be elucidated by comparing pig models that were significantly different in IMF content. Lipid metabolism could theoretically contribute to the variation in fat deposition content [3,4]. The extent of fat deposition in muscle depends on the balance of synthesis and degradation of triglyceride (TAG), including TAG synthesis, fat mobilization, and fatty acid oxidation [5]. Previous studies confirmed that not only lipogenesis, but also lipolysis and fatty acid oxidation are involved in IMF deposition. Thus, we hypothesized that higher IMF deposition may be resulted from diminished fat catabolism and/or increased endogenous fatty acid synthesis. Therefore, the aim of this study was to investigate the expression of genes involved in lipogenesis, lipolysis, and fatty acid transport in the muscle, to compare the expression pattern of lipid metabolism-related genes in pigs which varies in fat deposition capacity, and then to elucidate the underlying mechanisms of IMF deposition in two types of Hanjiang black pigs.A total of 32 pigs were used in the study, and 4 sires of each type were used. When the piglets weighed around 20 kg, they were individually fed and given free access to water from nipple drinkers and fed ad libitum with the same diet (Supplementary Table SI) suited to the nutritive needs. The numbers of pigs for each type of sire were 16 (female). Pigs were sacrificed at the age of 10 months (live weight 83 kg) according to European Community Requirement, electrical stunning using 1.25-1.30 A maintained for at least 3 s, and the voltage applied to achieve this current must be at least 240 V [6]. Then, pigs were exsanguinated and placed in a dehairer at 658C for 5 min. After being slaughtered, pH 45min was measured using a pH meter, and meat color was assessed with pork quality standards (American NPPC Shade Guide, 1994 edition) at 45 min post-slaughter; Warner-Bratzler shear force (WBSF) was measured using a C-LM3 digital display tenderness instrument equipped with a shearing device (XIELI Sci. Co., Harbin, China) [7]. After chilling of the carcasses for 24 h, longissimus lumborum muscles were isolated to evaluate the drip loss using the method described previously [8] with some modifications: muscle samples standardized for surface area (5 Â 3 Â 2.5 cm 3 ) were suspended in an inflated plastic bag for 24 h at 48C [9]. IMF content was evaluated using the Soxhlet petroleum-ether ext...

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The effect of feeding system in the expression of genes related with fat metabolism in semitendinous muscle in sheep

Cited by 77 publications

References 51 publications

Comparison of the meat quality and fatty acid composition of traditional fat-tailed (Chall) and tailed (Zel) Iranian sheep breeds

Comparison of the meat quality and fatty acid composition of traditional fat-tailed (Chall) and tailed (Zel) Iranian sheep breeds

<b>Time on feedlot and sexual effects on animal performance and characteristics of lamb’s meat

Differential expression of meat quality and intramuscular fat deposition related genes in Hanjiang black pigs

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