Journal
CZECH JOURNAL OF ANIMAL SCIENCE
Volume 58, Issue 10, Pages 479-487Publisher
CZECH ACADEMY AGRICULTURAL SCIENCES
DOI: 10.17221/6997-CJAS
Keywords
association studies; Bos taurus; calpain; calpastatin; meat tenderness; molecular markers; shear force; SNP
Categories
Funding
- COVAP
- CTA
- IDEA
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Frequencies of two SNPs in the mu-calpain (CAPN1) and calpastatin (CAST) genes in local and foreign commercial cross-breeds used in south-western Spain (Charolais, Limousin, and Retinta) were evaluated and the association of these markers with texture analysis in animals fattened under different feedlot conditions was assessed. Marker frequencies were estimated in a 286 bull crossbred population and the longisimus dorsi muscles from subsequently selected 161 animals were used to measure Warner-Bratzler shear force in raw and cooked samples at three different ageing days (1, 7, and 21). Significant differences (P <= 0.05) were found for shear force in raw and cooked meat samples for the three ageing days for the three crossbreeds analyzed. Significant associations were observed for raw meat for the Charolais between shear force and the CAPN1 marker (P = 0.019), as well as between the CAST polymorphism and shear force (P = 0.027) in the Limousin. No associations were found between the markers and shear force in the Retinta (P> 0.05). In contrast, although these markers might be useful in particular selected populations due to their effect on objective texture parameters, no significant association (P > 0.05) was found for cooked meat in the sample of Spanish commercial crossbreeds used in this study. Further studies with a higher number of animals will be necessary to confirm these results.
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