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Featured researches published by A. Schor.


Meat Science | 2008

Nutritional and eating quality of Argentinean beef : A review

A. Schor; M. E. Cossu; Alejandra Picallo; Jorge Martínez Ferrer; Juan José Grigera Naón; Dario Colombatto

This review deals with distinctive aspects of quality of Argentinean beef in terms of tenderness, flavour, colour, juiciness, taste, acceptability, lipid content and composition and its resultant nutraceutical characteristics. Differences are due to beef production systems based on temperate or tropical grasslands aimed at shortening the fattening phase as far as possible, with limited or null use of concentrates. However, the effect of limited supplemental feeding is also discussed as well as the responses arising from the use of beef cattle genotypes, including British, Continental, Dairy, Zebu breeds and their crosses, adapted to the various environments and systems found in the country.


Meat Science | 2010

Effect of ageing and μ-calpain markers on meat quality from Brangus steers finished on pasture

Juliana Papaleo Mazzucco; L.M. Melucci; E. L. Villarreal; C. A. Mezzadra; L. A. Soria; Pablo Corva; Mm Motter; A. Schor; María C. Miquel

Brangus steers (n=247) finished on pasture were used to evaluate the effects of post-mortem ageing and polymorphism CAPN1 316 and CAPN1 4751 markers on meat tenderness and objective colour measurements (CIEL*a*b*) of m. Longissimus dorsi. Ageing meat for 7 days decreased shear force (SF) by 13.7% and improved a* (8.4%) and b* (10%) compared to ageing for 1 day. No difference between 7 and 14 days of ageing was found for SF, a* and b*. However, L* increased markedly with ageing. Fitting both markers simultaneously, CAPN1 316 showed association with SF and L* and CAPN1 4751 with a* and b*. Fitting the markers individually, CAPN1 4751 affected all traits and CAPN1 316 showed association with SF and L*. Post-mortem ageing and the use of markers represent two independent and alternative tools that could be used for improving quality of meat from Brangus cattle.


Molecular and Cellular Probes | 2009

Association of a novel polymorphism in the bovine PPARGC1A gene with growth, slaughter and meat quality traits in Brangus steers.

L. A. Soria; Pablo Corva; A. Branda Sica; E. L. Villarreal; L.M. Melucci; C. A. Mezzadra; J. Papaleo Mazzucco; G. V. Fernández Macedo; C. Silvestro; A. Schor; María C. Miquel

The PPARGC1A gene (peroxysome proliferator-activated receptor-gamma coactivator 1alpha gene) controls muscle fiber type and brown adipocyte differentiation; therefore, it is a candidate gene for beef quality traits (tenderness and fat content). Two SNPs (Single Nucleotide Polymorphisms) were identified within exon 8 by multiple alignment of DNA sequences obtained from 24 bulls: a transition G/A (SNP 1181) and a transversion A/T (SNP 1299). The SNP 1181 is a novel SNP, corresponding to a non-conservative substitution (AGT/AAT) that could be the cause of amino acid substitution ((364)Serine/(364)Asparagine). A Mismatch PCR method was designed to determine genotypes of 73 bulls and 268 steers for SNP 1181. Growth, slaughter and meat quality information were available for the group of steers. Allele A of SNP 1181 was not found in Angus. In 243 steers, no significant differences (P > 0.05) were found for either final live body weight, gain in backfat thickness in Spring, kidney fat weight, kidney fat percentage, Warner-Bratzler shear force at 7 days postmortem, intramuscular fat percentage or meat colour between genotype GG and AG. This SNP could be included in breed composition and population admixture analyses because there are marked differences in allelic frequencies between Bos taurus and Bos indicus breeds.


Genetics and Molecular Research | 2011

Genetic markers of body composition and carcass quality in grazing Brangus steers.

Baeza Mc; Pablo Corva; L. A. Soria; Gonzalo Rincon; Juan F. Medrano; Pavan E; E. L. Villarreal; A. Schor; L.M. Melucci; C. A. Mezzadra; María C. Miquel

The somatotropic axis is a major regulatory pathway of energy metabolism during postnatal growth in mammals. Genes involved in this pathway influence many economically important traits. The association of selected SNPs in these genes with carcass traits was examined in grazing Brangus steers. These traits included final live weight, ultrasound backfat thickness (UBFT), rib-eye area, kidney fat weight, hot carcass weight, and intramuscular fat percentage (%IMF). Genomic DNA (N = 246) was genotyped for a panel of 15 tag SNPs located in the growth hormone receptor (GHR), insulin-like growth factor I, insulin-like growth factor-binding protein 6, pro-melanin-concentrating hormone, suppressor of cytokine signaling 2, and signal transducer and activator of transcription 6 (STAT6) genes. Allelic and haplotype frequencies were compared with those of a sample of European breeds (N = 177 steers). Two tag SNPs in the GHR affected %IMF; one of them (ss86273136) was also strongly associated with UBFT (P < 0.003). The frequency of the most favorable GHR haplotype for %IMF was lower in Brangus steers. Moreover, the haplotype carrying two unfavorable alleles was present at a frequency of 31% in this group. Four tag SNPs on STAT6 had a significant effect on UBFT. One of these, SNP ss115492467, was also associated with %IMF. The STAT6 haplotype, including all the alleles favoring UBFT, was the most abundant variant (34%) in the European cattle, while it had a frequency of 14% in the Brangus steers. The four less favorable variants (absent in the European cattle) were found at a frequency of 38% in the Brangus steers. These results support the association of GHR and STAT6 SNP with carcass traits in composite breeds, such as Brangus, under grazing conditions.


Genetics and Molecular Biology | 2009

The association of CAPN1 316 marker genotypes with growth and meat quality traits of steers finished on pasture

María C. Miquel; E. L. Villarreal; C. A. Mezzadra; L.M. Melucci; L. A. Soria; Pablo Corva; A. Schor

The objective of this paper was to determine the association of a SNP in the μ-calpain gene at position 316 with growth and quality of meat traits of steers grown on pasture. Fifty-nine Brangus and 20 Angus steers were genotyped for CAPN1 316. Warner Bratzler shear force was measured in l. lumborum samples after a 7-day aging period. A multivariate analysis of variance was performed, including shear force (WBSF), final weight (FW), average daily gain (ADG), backfat thickness (BFT), average monthly fat thickness gain (AMFTG), rib-eye area (REA), and beef rib-eye depth (RED) as dependent variables. The CAPN1 316 genotype was statistically significant. Univariate analyses were done with these variables. The marker genotype was statistically significant (p < 0.05) for WBSF (kg: CC: 4.41 ± 0.57; CG: 5.58 ± 0.20; GG: 6.29 ± 0.18), FW (kg: CC: 360.23 ± 14.71; CG: 381.34 ± 5.26; GG: 399.23 ± 4.68), and ADG (kg/d: CC: 0.675 ± 0.046; CG: 0.705 ± 0.016; GG: 0.765 ± 0.014) Shear force, final weight and average daily gain were significantly different according to the CAPN1 316 marker genotypes. The marker genotype was statistically significant in the multivariate analysis (p = 0.001). The first characteristic root explained 89% of the differences among genotypes. WBSF, FW and ADG were the most important traits in the first vector, indicating that animals with the marker genotype for lowest WBSF also have the lowest FW and ADG.


Archivos De Zootecnia | 2011

Variantes en dos genes candidatos para características de calidad de carne bovina en Argentina

A. Branda Sica; L. A. Soria; Pablo Corva; E. L. Villarreal; L.M. Melucci; C. A. Mezzadra; A. Schor; María C. Miquel

Resumen es: La calidad de la carne bovina esta definida por muchos atributos. Esta determinada por factores geneticos y ambientales (edad al sacrificio, alimentacion...


Genetics and Molecular Biology | 2007

Association of CAPN1 and CAST gene polymorphisms with meat tenderness in Bos taurus beef cattle from Argentina

Pablo Corva; L. A. Soria; A. Schor; E. L. Villarreal; Macarena Pérez Cenci; Mm Motter; C. A. Mezzadra; L.M. Melucci; Cristina Miquel; E. Pavan; Gustavo Depetris; Francisco Santini; Juan José Grigera Naón


Revista Argentina de Producción Animal | 2015

Efecto de la fecha de destete sobre la performance de vientres y terneros

A. Schor; G. Guibelalde; J.J. Grigera Naón


Revista Argentina de Producción Animal | 2014

Características productivas, composición de carcasa y calidad de carne de novillos de diferente tamaño estructural alimentados en feedlot con dietas de concentraciones energéticas distintas

Francisco Santini; E. L. Villarreal; C. Faverin; G. Depetris; E. Pavan; J. J. Grigera Naón; J. M. Grigera; M. E. Cossu; A. Schor


Archivos Latinoamericanos de Producción Animal | 2014

Patagonia (Argentina) beef quality.

Alejandra Picallo; M. E. Cossu; J. J. Grigera Naón; A. M. Pereyra; M. L. Lamanna; A. Schor; P. C. Gambetti; Dario Colombatto; H. von Bernard; B. Coste; F. Rozen; S. Moisá

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L. A. Soria

University of Buenos Aires

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María C. Miquel

University of Buenos Aires

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M. E. Cossu

University of Buenos Aires

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Mm Motter

University of Buenos Aires

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Alejandra Picallo

University of Buenos Aires

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Dario Colombatto

University of Buenos Aires

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A. Branda Sica

University of Buenos Aires

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C. Silvestro

University of Buenos Aires

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Cristina Miquel

University of Buenos Aires

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