Lipidic characterization of Santa Inês lamb shoulder

Cruz, Carlos Janssen Gomes da; Santos-Cruz, Cristiane Leal dos; Castillo, Carmen; Souza, Alexilda Oliveira de; Silva, Lílian Borges da; Brito, Priscila Nunes

doi:10.1590/s0101-20612011000200036

Cited by 8 publications

(8 citation statements)

References 21 publications

(20 reference statements)

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“…The predominant individual SFAs were palmitic (C16:0, 22.17%), stearic (C18:0, 20.29%), and myristic (C14:0, 2.21%) corresponding to about 95% of the SFA present in the Longissimus dorsi muscle. These results agreed with those reported in previous studies [ 19 , 23 – 25 ], where these SFAs were predominant in sheep. The C14:0 and C16:0 acids have been associated with increased serum level of cholesterol and LDL (low-density lipoproteins) and decreased levels of HDL (high density lipoproteins) in the blood, major factors related to obesity, atherosclerosis, hypertension, heart, and coronary diseases [ 3 – 5 ].…”

Section: Resultssupporting

confidence: 94%

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Estimates of genomic heritability and genome-wide association study for fatty acids profile in Santa Inês sheep

et al. 2018

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BackgroundDespite the health concerns and nutritional importance of fatty acids, there is a relative paucity of studies in the literature that report genetic or genomic parameters, especially in the case of sheep populations. To investigate the genetic architecture of fatty acid composition of sheep, we conducted genome-wide association studies (GWAS) and estimated genomic heritabilities for fatty acid profile in Longissimus dorsi muscle of 216 male sheep.ResultsGenomic heritability estimates for fatty acid content ranged from 0.25 to 0.46, indicating that substantial genetic variation exists for the evaluated traits. Therefore, it is possible to alter fatty acid profiles through selection. Twenty-seven genomic regions of 10 adjacent SNPs associated with fatty acids composition were identified on chromosomes 1, 2, 3, 5, 8, 12, 14, 15, 16, 17, and 18, each explaining ≥0.30% of the additive genetic variance. Twenty-three genes supporting the understanding of genetic mechanisms of fat composition in sheep were identified in these regions, such as DGAT2, TRHDE, TPH2, ME1, C6, C7, UBE3D, PARP14, and MRPS30.ConclusionsEstimates of genomic heritabilities and elucidating important genomic regions can contribute to a better understanding of the genetic control of fatty acid deposition and improve the selection strategies to enhance meat quality and health attributes.

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Section: Resultssupporting

confidence: 94%

“…The percentage of intramuscular fat (IMF) ranged between 1.62 and 4.93. These values were similar to those reported in sheep by [ 19 – 21 ], but lower than the values reported by [ 22 , 23 ].…”

Section: Resultssupporting

confidence: 90%

Estimates of genomic heritability and genome-wide association study for fatty acids profile in Santa Inês sheep

et al. 2018

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“…And that can be verified in the study by Madruga et al (2006) by evaluating the lipid profile of lambs of the Santa Inês and ½ Santa Inês x ½ Dorper breeds slaughtered late (mean weight of 90kg), where lower proportions of monounsaturated fatty acids and higher proportions of polyunsaturated fatty acids for the animals of the cross with Dorper were found. The SI animals presented higher contents of C18:2ω6t (Table 4), which comes to corroborate with the results found by Cruz et al (2011) with Santa Inês sheep, in which they report a higher concentration of this fatty acid.…”

Section: Resultssupporting

confidence: 88%

The polymorphisms of genes associated with the profile of fatty acids of sheep

Esteves

Livramento

Paiva

et al. 2019

Arq. Bras. Med. Vet. Zootec.

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The present study aimed to evaluate the occurrence of polymorphisms in Diacylglycerol acyltransferase (DGTA-1 and 2), Fatty acid synthase (FASN), Stearoyl-CoA desaturase (SCD) genes and the Thioesterase domain of FASN (TE-FASN) gene that may be related to the lipid profile. In the experiment, a total of 84 sheep from different genetic groups were used. For the evaluation of the polymorphism of the genes, PCR-Single Strand Conformation Polymorphism (SSCP) technique and subsequent sequencing were used. In DGAT-2 gene, four genotypes were identified with the presence of 6 polymorphisms, with two (c.229T> C; c.255T> C) that resulted into the exchange of phenylalanine by leucine. In FASN gene, two genotypes were identified. In TE-FASN gene, three genotypes and 17 polymorphisms were identified. DGAT-1 and SCD genes did not reveal the occurrence of polymorphism. There was difference in relation to C14: 0, C18: 0 fatty acids and Δ9-desaturase C18 for DGAT-2 gene and of C18: 2ω6t for TE-FASN. There were differences among the genetic groups for C10: 0, C12: 0, C17: 0, C18: 2ω6t, C18: 3ω3, C20: 2, total of ω3, ω3/ω6 and atherogenicity index. There is occurrence of polymorphism of DGAT-2 and TE-FASN genes and these should be further studied in sheep since they revealed influence of the genotypes on the fatty acid profile.

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“…Stearic acid, unlike other saturated fatty acids, reduces serum cholesterol in humans. In contrast, palmitic acid (C16:0) increases cholesterol synthesis, which is a risk factor for cardiovascular disease (Cruz et al, 2011). The mean value for C18:0 observed in the present study (51.63%) was higher than the 14% reported by Andrés et al (2014), who worked with younger lambs.…”

Section: Genetics Pregnancy and Age On Sheep Meatcontrasting

confidence: 74%

Effects of genetic group, pregnancy and age on carcass traits, meat quality and fatty acid profile in female sheep

Esteves

Peripolli

Costa

et al. 2019

Rev Colom Cienc Pecua

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Background: Little information is available on carcass quality in nulliparous and primiparous ewes of different breeds and genetic groups. Objective: To evaluate the effect of genetic group, pregnancy, age and their interactions on carcass traits, meat quality and fatty acid profile in sheep. Methods: Eighty-five Santa Ines ewes and their crosses with Texel, Dorper and Ile de France, aged 12 month were bred with White Dorper rams to assess the influence of pregnancy on carcass composition and meat quality. After weaning, all ewes (nulliparous and primiparous) were fattened for slaughter at 21 months of age. A further 24 six to twenty one-month-old female lambs from the same genetic groups were included in the analysis to determine the fatty acid profile. Results: Genetic group affected muscle and fat weight as well as the eye muscle length. Fat weight, muscle and fat ratios, subcutaneous fat thickness and cooking loss were affected by pregnancy with nulliparous females being fatter. Meat purpose breeds such as Dorper, Texel and Ile de France showed better meat quality compared to the Santa Ines hair breed. Of the 19 identified fatty acids, saturated were present in greater quantities, especially stearic and palmitic. Omega-6 content was influenced by age and pregnancy. Conclusions: Younger and nulliparous females have better carcass quality in terms of fatty acid composition.Keywords: commercial cuts, fat content, meat breeds, ovines, Santa Ines, slaughter age. Resumen Antecedentes: Existe poca información sobre la calidad de la canal en ovejasjóvenes nulíparas y primíparas de diferentes razas y grupos genéticos. Objetivo: Evaluar la influencia del grupo genético, de la preñez, de la edad y sus interacciones sobre la composición de la canal, calidad de la carne y perfil de ácidos grasos en la carne de ovejas. Métodos: Ochenta y cinco ovejas de 12 meses de edad de raza Santa Inés y sus cruces con Texel, Dorper y Ile de France fueron cruzadas con carneros White Dorper para evaluar la influencia de la gestación sobre la composición de la canal y la calidad de la carne. Después del destete, todas las ovejas (nulíparas y primíparas) fueron engordadas y sacrificadas a los 21 meses de edad. Otras 24 ovejas de seis a veintiún meses de edad del mismo grupo genético fueron incluidas en el análisis para determinar el perfil de ácidos grasos. Resultados: El grupo genético afectó el peso del músculo y de la grasa, como también la longitud del ojo del músculo. El peso de la grasa, porcentajes de músculo y grasa, el grosor de la grasa subcutánea y las perdidas por cocción fueron afectadas por la preñez, siendo más gordas las hembras nulíparas. Los grupos genéticos especializados en producir carne como Dorper, Texel e Ile de France mostraron mejor calidad de carne comparado con la raza Santa Inés. De los 19 ácidos grasos identificados, los saturados estaban presentes en mayores cantidades, especialmente esteárico y palmítico. Los contenidos de Omega-6 fueron influenciados por la edad y la preñez. Conclusiones: Las ovejas más jóvenes y nulíparas tienen mejor calidad de carcasa en términos de composición de ácidos grasos.Palabras clave: contenido de grasa, cortes comerciales, edad de sacrificio, ovinos, razas de carne, Santa Inés. Resumo Antecedentes: Existe pouca informação sobre a qualidade da carcaça em ovelhas jovens nulíparas e primíparas de diferentes raças e grupos genéticos. Objetivo: Avaliar a influência do grupo genético, da prenhes, da idade e suas interações sobre as características da carcaça, qualidade da carne e perfil de ácidos graxos na carne de ovelhas. Métodos: Oitenta e cinco ovelhas Santa Inês e suas cruzas com Texel, Dorper e Ile de France com 12 meses de idade foram cruzadas com carneiros White Dorper para avaliar a influência da prenhes sobre a composição da carcaça e a qualidade da carne. Após o desmame, todas as ovelhas (nulíparas e primíparas) foram engordadas para serem abatidas aos 21 meses de idade. Mais 24 ovelhas com idade variando entre seis a vinte e um meses do mesmo grupo genético foram incluídas na análise para determinar o perfil de ácidos graxos. Resultados: O grupo genético influenciou os pesos do musculo e da gordura bem como o comprimento da área de olho de lombo. O peso da gordura, a relação músculo e gordura, a espessura de gordura subcutânea e as perdas por cocção foram influenciadas pela prenhes,sendo asfêmeas nulíparas as mais gordas. Os grupos genéticos especializados em produção de carne como o Dorper, o Texel e o Ile de France apresentaram melhor qualidade de carne comparado a raça Santa Inês. Dos 19 ácidos graxos identificados, os presentes em maiores quantidades foram os saturados, principalmente o esteárico e o palmítico. O Conteúdo de ômega 6 foi influenciado pela idade e pela prenhes. Conclusões: As fêmeas jovens e nulíparas apresentam melhor qualidade de carcaça em termos de composição de ácidos graxos.Palavras-chave: conteúdo de gordura, cortes comerciais, idade de abate, ovinos, raças de corte, Santa Inês.

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Lipidic characterization of Santa Inês lamb shoulder

Cited by 8 publications

References 21 publications

Estimates of genomic heritability and genome-wide association study for fatty acids profile in Santa Inês sheep

Estimates of genomic heritability and genome-wide association study for fatty acids profile in Santa Inês sheep

The polymorphisms of genes associated with the profile of fatty acids of sheep

Effects of genetic group, pregnancy and age on carcass traits, meat quality and fatty acid profile in female sheep

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