Genes da calpastatina e calpaína associados à qualidade da carne de ovinos pantaneiros

Abstract

The objective was to verify the presence of genetic polymorphisms calpastatin gene (CAST) and Calpain gene (CAPN) and analyze associations between carcass characteristics and quality of sheep meat. 47 Pantanal sheep and 40 sheep race without properly set were used. Blood samples were collected from 87 sheep and genomic DNA was extracted using organic solvents. Reactions were performed by polymerase chain reaction (PCR) for both markers. For CAST marker was used to PCR- RFLP technique with the MspI restriction enzyme, and the CAPN marker was used PCR-SSCP technique. The most frequent genotypes for the MM were cast (74%) and MN (25%) and the CAPN were AA (51.5%) and AB (17.5%). For sheep group undefined breed the AA genotype was significantly associated the following characteristics: hot carcass yield; Cold carcass yield; Brightness of the Longissimus dorsi; Semimembranosus shear strength and shear strength of the Longissimus dorsi, AB genotype was significantly associated to the characteristics of: hot carcass yield; Cold carcass yield; Brightness of the Longissimus dorsi; Water retention capacity of Semimembranosus and Semimembranosus shear force. Finally the AA genotype was significantly associated to yield hot carcass characteristics and capacity of the Longissimus dorsi water retention. For the Pantanal sheep Group AA genotype was significantly associated to water retention capacity of the Longissimus dorsi. The AB genotype was significantly associated to the characteristics of: color; Yellow pigments (b) of the Longissimus dorsi and ribeye area. For the Pantanal sheep MN genotype was significantly associated to the characteristics of: hot carcass weight and cold carcass weight. These associations indicate the productive potential of these animals. In this respect there is little information available serve new studies to understand the association of CAST and CAPN gene with carcass characteristics and meat quality, making the use of these markers an indispensable tool for selection and conservation of animals presented genes.