Carcass traits

Transcriptional analysis of the porcine TTID gene and association of different TTID genotypes with carcass traits

J. Wang, Feng, Y. - P., Zuo, B., Xiong, Y. - Z., and Deng, C. - Y., “Transcriptional analysis of the porcine TTID gene and association of different TTID genotypes with carcass traits”, vol. 13, pp. 1195-1202, 2014.

The titin immunoglobulin domain (TTID) protein localizes to the Z line in muscle and binds to alpha-actinin and gamma-filamin. It plays an indispensable role in stabilizing and anchoring of thin filaments. In this study, the 5'-regulatory region of the porcine TTID gene was analyzed with bioinformatic methods. Another objective of this study was to further investigate the polymorphism in the intron 6 of the porcine TTID gene. We determined allele frequency among six Chinese porcine purebreds.

Carcass and meat quality traits of four commercial pig crossbreeds in China

Y. Z. Jiang, Zhu, L., Tang, G. Q., Li, M. Z., Jiang, A. A., Cen, W. M., Xing, S. H., Chen, J. N., Wen, A. X., He, T., Wang, Q., Zhu, G. X., Xie, M., and Li, X. W., “Carcass and meat quality traits of four commercial pig crossbreeds in China”, vol. 11, pp. 4447-4455, 2012.

We evaluated carcass and meat quality traits of two Chinese native crossbreeds Landrace x Meishan (LM) and Duroc x (Landrace x Meishan) (DLM) and two foreign crossbreeds Duroc x (Landrace x Yorkshire) (DLY) and PIC (an imported five-way crossbreed). One hundred and twenty weaned pigs (half castrated males and half females) were reared and slaughtered at a predestinated slaughter age. The general carcass and meat quality traits were measured and analyzed. The DLY and PIC crosses had significantly heavier live weights (93.39 and 96.33 kg, P 2, P 2, P 1 (5.82, P 2 (5.63, P

Joint analysis of beef growth and carcass quality traits through calculation of co-variance components and correlations

H. R. Mirzaei, Verbyla, A. P., and Pitchford, W. S., “Joint analysis of beef growth and carcass quality traits through calculation of co-variance components and correlations”, vol. 10, pp. 433-447, 2011.

A joint growth-carcass model using random regression was used to estimate the (co)variance components of beef cattle body weights and carcass quality traits and correlations between them. During a four-year period (1994-1997) of the Australian “southern crossbreeding project”, mature Hereford cows (N = 581) were mated to 97 sires of Jersey, Wagyu, Angus, Hereford, South Devon, Limousin, and Belgian Blue breeds, resulting in 1141 calves.

Candidate gene region for control of rib eye area in Canchim beef cattle

S. L. Meirelles, Gouveia, G. V., Gasparin, G., Alencar, M. M., Gouveia, J. J. S., and Regitano, L. C. A., “Candidate gene region for control of rib eye area in Canchim beef cattle”, vol. 10, pp. 1220-1226, 2011.

Investigation of molecular marker effects on production traits is essential to define marker assisted selection strategies in beef cattle. We looked for a possible association of molecular markers and backfat thickness (BFT) and rib eye area (REA) in Canchim (5/8 Charolais + 3/8 Zebu) and MA (offspring of Charolais bulls and 1/2 Canchim + 1/2 Zebu cows) animals raised exclusively on pasture. Traits were measured on 987 individuals from seven herds from two Brazilian States (São Paulo and Goiás), in March and April from 2005 to 2007, when animals were, on average, 19 months of age.

Association between a single nucleotide polymorphism in the bovine chemerin gene and carcass traits in Qinchuan cattle

W. Q. Tian, Wang, H. C., Song, F. B., Zan, L. S., Wang, H., Wang, H. B., Xin, Y. P., and Ujan, J. A., “Association between a single nucleotide polymorphism in the bovine chemerin gene and carcass traits in Qinchuan cattle”, vol. 10, pp. 2833-2840, 2011.

Qinchuan is a red or yellow draft and beef breed in China. In order to identify a predictor of carcass traits on the basis of associations between carcass traits and gene polymorphism, variation in the bovine chemerin gene was investigated using PCR-single-strand conformational polymorphism and DNA sequencing. An SNP of A868G located in exon 2 of the Bos taurus chemerin gene was detected in 716 samples of six breeds (Jiaxian red, Luxi, Nan yang, Qinchuan, Simmental and Luxi crossbred steers, and Xia’nan), all in China, and three genotypes (AA, AG and GG) were found.

Detection of novel SNPs and mapping of the fatness QTL on pig chromosome 7q1.1-1.4 region

W. H. Huang, Ma, Z. X., Xu, Z. Y., Xiong, Y. Z., and Zuo, B., “Detection of novel SNPs and mapping of the fatness QTL on pig chromosome 7q1.1-1.4 region”, vol. 10, pp. 3090-3097, 2011.

Many QTLs for fatness traits have been mapped on pig chromosome 7q1.1-1.4 in various pig resource populations. Eight novel markers, including seven SNPs and one insertion or deletion within BTNL1, COL21A1, PPARD, GLP1R, MDFI, GNMT, ABCC10, and PLA2G7 genes, as well as two previously reported SNPs in SLC39A7 and HMGA1 genes, were genotyped in Large White and Meishan pig breeds.

Phenotypic and genetic parameters compared during repeated measures of longissimus muscle area and subcutaneous fat thickness in Nelore cattle

T. R. Pinheiro, Mercadante, M. E. Z., Albuquerque, L. G., Cyrillo, J. N. S. G., and Branco, R. H., “Phenotypic and genetic parameters compared during repeated measures of longissimus muscle area and subcutaneous fat thickness in Nelore cattle”, vol. 10, pp. 2944-2952, 2011.

Real-time ultrasound is currently used for in vivo carcass evaluation of beef cattle. We estimated heritability and repeatability coefficients for ultrasound-measured carcass traits in Nelore cattle. We measured longissimus muscle area, backfat thickness, and rump fat thickness in male and female animals ranging in age from 10 to 26 months. The variance components were estimated by single-trait analysis using the derivative-free restricted maximum likelihood method, under an animal model.

Single nucleotide polymorphisms in Brahman steers and their association with carcass and tenderness traits

T. Smith, Thomas, M. G., Bidner, T. D., Paschal, J. C., and Franke, D. E., “Single nucleotide polymorphisms in Brahman steers and their association with carcass and tenderness traits”, vol. 8, pp. 39-46, 2009.

Data from purebred Brahman steers (N = 467) were used to study the association of single nucleotide polymorphisms (SNP) with carcass traits and measures of tenderness. Fall weaned calves were grazed and fed in a subtropical environment and then harvested for processing in a commercial facility. Carcass data were recorded 24 h postmortem. Muscle samples and primal ribs were obtained to measure calpastatin activity and shear force. DNA was used to determine genotypes of thyroglobulin (TG5), calpastatin (CAST) and μ-calpain (CAPN 316 and CAPN 4751) SNP.

Heritability estimates for carcass traits of cattle: a review

A. Ríos Utrera and Van Vleck, L. Dale, “Heritability estimates for carcass traits of cattle: a review”, vol. 3. pp. 380-394, 2004.

We present estimates of heritability for carcass traits of cattle published in the scientific literature. Seventy-two papers published from 1962 to 2004, which reported estimates of heritability for carcass traits, were reviewed. The unweighted means of estimates of heritability for 14 carcass traits by slaughter end point (age, weight, and fat depth) were calculated.

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