scholarly journals Response to selection for decreased backfat thickness at restrained intramuscular fat content in Duroc pigs1

2013 ◽  
Vol 91 (8) ◽  
pp. 3514-3521 ◽  
Author(s):  
R. Ros-Freixedes ◽  
J. Reixach ◽  
L. Bosch ◽  
M. Tor ◽  
J. Estany
Keyword(s):  
Intramuscular Fat ◽  
Fat Content ◽  
Backfat Thickness ◽  
Response To Selection ◽  
Selection For ◽  
Intramuscular Fat Content

scholarly journals Association of Twelve Candidate Gene Polymorphisms with the Intramuscular Fat Content and Average Backfat Thickness of Chinese Suhuai Pigs

Animals ◽  
2019 ◽  
Vol 9 (11) ◽  
pp. 858 ◽  
Author(s):  
Wang ◽  
Li ◽  
Zhou ◽  
Gao ◽  
Liu ◽  
...  
Keyword(s):  
Molecular Markers ◽  
Gene Polymorphisms ◽  
Genetic Correlations ◽  
Intramuscular Fat ◽  
Fat Content ◽  
Backfat Thickness ◽  
Nucleotide Polymorphisms ◽  
Single Nucleotide ◽  
Coefficients Of Variation ◽  
Intramuscular Fat Content

The present study aimed to identify the molecular markers for genes that influence intramuscular fat content (IFC), but not average backfat thickness (ABT). A total of 330 Suhuai pigs were slaughtered, and measurements of IFC and ABT were obtained. Phenotypic and genetic correlations between IFC and ABT were calculated. Thirteen single nucleotide polymorphisms (SNPs) among 12 candidate genes for IFC were analyzed, including FABP3, LIPE, IGF1, IGF2, LEP, LEPR, MC4R, PHKG1, RETN, RYR1, SCD, and UBE3C. Associations of the evaluated SNPs with IFCIFC and ABT were performed. Our results showed that the means of IFC and ABT were 1.99 ± 0.03 % and 26.68 ± 0.28 mm, respectively. The coefficients of variation (CVs) of IFC and ABT were 31.21% and 19.36%, respectively. The phenotypic and genetic correlations between IFC and ABT were moderate. Only the FABP3 (rs1110770079) was associated with IFC (p < 0.05) but not with ABT. Besides, there was a tendency for associations of RYR1 (rs344435545) and SCD (rs80912566) with IFC (p < 0.1). Our results indicated that the FABP3 (rs1110770079) SNP could be used as a marker to improve IFC without changing ABT in the Suhuai pig breeding system.

The X Chromosome harbors quantitative trait loci for backfat thickness and intramuscular fat content in pigs

2000 ◽  
Vol 11 (9) ◽  
pp. 800-802 ◽  
Author(s):  
Barbara Harlizius ◽  
Annemieke P. Rattink ◽  
Dirk J. de Koning ◽  
Marilyne Faivre ◽  
Ruth G. Joosten ◽  
...  
Keyword(s):  
Quantitative Trait Loci ◽  
X Chromosome ◽  
Quantitative Trait ◽  
Intramuscular Fat ◽  
Fat Content ◽  
Backfat Thickness ◽  
Trait Loci ◽  
Intramuscular Fat Content

scholarly journals Body fat content, composition and distribution in Landrace and Iberian finishing pigs given ad libitum maize- and acorn-sorghum-maize-based diets

2003 ◽  
Vol 77 (2) ◽  
pp. 215-224 ◽  
Author(s):  
J. Morales ◽  
M.D. Baucells ◽  
J.F. Pérez ◽  
J. Mourot ◽  
J. Gasa
Keyword(s):  
Food Intake ◽  
Body Fat ◽  
Live Weight ◽  
Intramuscular Fat ◽  
Fat Content ◽  
Backfat Thickness ◽  
Lipogenic Enzyme ◽  
Body Fat Content ◽  
Fat Composition ◽  
Intramuscular Fat Content

AbstractWe aimed to determine whether the dietary carbohydrate source altered body fat composition and distribution in finishing lean (Landrace) and obese (Iberian) swine. To this end, twenty-four finishing castrated male pigs (12 Iberian and 12 Landrace; 108 kg live weight) were offered two diets differing in the main carbohydrates source, maize (diet M) or acorn-sorghum-maize (diet A). Diets were formulated to have the same nutrient content, except for carbohydrate fractions: diet M contained higher amount of starch (537 v. 389 g/kg) but less non-starch polysaccharides (118 v. 148 g/ kg) than diet A. At an average weight of 133 kg live weight pigs were slaughtered and their carcasses were sampled to study lipogenesis, backfat and intramuscular fat composition. Iberian pigs showed a higher voluntary food intake than Landrace pigs (3·6 v. 2·4 kg/day; P < 0·001) but no significant differences in the daily weight gain. Diet M tended to promote the highest food intake (P = 0·09). Iberian pigs showed higher (P < 0·01) lipogenic enzyme activities, backfat thickness (71·7 v. 31·9 mm) and intramuscular fat content (40 to 95 g/kg fresh muscle) than Landrace pigs, which was associated with their higher food intake. Furthermore, fat depots from Iberian pigs had higher (P < 0·001) monounsaturated fatty acids (MUFA) and lower (P < 0·05) polyunsaturated (PUFA) proportions than those from Landrace pigs. The backfat thickness of pigs given diet M tended to be higher (P = 0·07) than that of pigs given diet A, without differences in the intramuscular fat content. The higher backfat thickness found for diet M was correlated with a lower PUFA proportion in diet than for diet A (P < 0·001). We conclude that body fat content, composition and lipogenic enzyme activities are markedly influenced by the animal breed and to a lesser extent by dietary characteristics.

The effect of arginine on the Wnt/β-catenin signaling pathway during porcine intramuscular preadipocyte differentiation

2017 ◽  
Vol 8 (1) ◽  
pp. 381-386 ◽  
Author(s):  
Xiaoling Chen ◽  
Yanliu Luo ◽  
Gang Jia ◽  
Guangmang Liu ◽  
Hua Zhao ◽  
...  
Keyword(s):  
Signaling Pathway ◽  
Intramuscular Fat ◽  
Fat Content ◽  
Backfat Thickness ◽  
Finishing Pigs ◽  
Preadipocyte Differentiation ◽  
Underlying Mechanisms ◽  
Intramuscular Fat Content ◽  
Arginine Supplementation

Dietaryl-arginine supplementation decreases backfat thickness and increases intramuscular fat content in growing-finishing pigs, but the underlying mechanisms are unknown.

scholarly journals Detection of Quantitative Trait Loci for Backfat Thickness and Intramuscular Fat Content in Pigs (Sus scrofa)

Genetics ◽  
1999 ◽  
Vol 152 (4) ◽  
pp. 1679-1690 ◽  
Author(s):  
Dirk J de Koning ◽  
Luc L G Janss ◽  
Annemieke P Rattink ◽  
Pieter A M van Oers ◽  
Beja J de Vries ◽  
...  
Keyword(s):  
Intramuscular Fat ◽  
Interval Mapping ◽  
Fat Content ◽  
Backfat Thickness ◽  
Chromosome 2 ◽  
Large White ◽  
Cross Model ◽  
Suggestive Evidence ◽  
Line Cross ◽  
Intramuscular Fat Content

Abstract In an experimental cross between Meishan and Dutch Large White and Landrace lines, 619 F2 animals and their parents were typed for molecular markers covering the entire porcine genome. Associations were studied between these markers and two fatness traits: intramuscular fat content and backfat thickness. Association analyses were performed using interval mapping by regression under two genetic models: (1) an outbred line-cross model where the founder lines were assumed to be fixed for different QTL alleles; and (2) a half-sib model where a unique allele substitution effect was fitted within each of the 19 half-sib families. Both approaches revealed for backfat thickness a highly significant QTL on chromosome 7 and suggestive evidence for a QTL at chromosome 2. Furthermore, suggestive QTL affecting backfat thickness were detected on chromosomes 1 and 6 under the line-cross model. For intramuscular fat content the line-cross approach showed suggestive evidence for QTL on chromosomes 2, 4, and 6, whereas the half-sib analysis showed suggestive linkage for chromosomes 4 and 7. The nature of the QTL effects and assumptions underlying both models could explain discrepancies between the findings under the two models. It is concluded that both approaches can complement each other in the analysis of data from outbred line crosses.

Effects of genomic selection for intramuscular fat content in breast muscle in Chinese local chickens

2018 ◽  
Vol 50 (1) ◽  
pp. 87-91 ◽  
Author(s):  
R. Liu ◽  
M. Zheng ◽  
J. Wang ◽  
H. Cui ◽  
Q. Li ◽  
...  
Keyword(s):  
Genomic Selection ◽  
Intramuscular Fat ◽  
Fat Content ◽  
Breast Muscle ◽  
Selection For ◽  
Intramuscular Fat Content ◽  
Local Chickens
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