title: Calcium and potassium content in beef: influences on tenderness and associations with molecular markers in Nellore cattle.
abstract: Calcium (Ca) and potassium (K) are essential nutrients in animal nutrition. Furthermore, the Ca content can influence meat tenderness because it is needed by the proteolytic system of calpains and calpastatins, major factors in postmortem tenderization of skeletal muscles. K content, which is needed for muscle contraction, can also affect meat tenderness. This study showed that K positively affects the Warner-Bratzler shear force (WBSF), measured at 14days of meat aging, which means that higher levels of K are related to lower meat tenderness. Additionally, a significant effect (P≤0.015) of a SNP in the calcium-activated neutral protease 1 (CAPN1) gene on Ca content was observed. Metal content in beef can affect not only nutritional values but also meat quality traits. Part of this effect may be related to variation in specific genes.
authors.affiliation: Department of Genetic and Evolution, Federal University of Sao Carlos, São Carlos, SP, Brazil.
authors.forename: Polyana Cristine
authors.initials: PC
authors.lastname: Tizioto
authors.forename: Caio Fernando
authors.initials: CF
authors.lastname: Gromboni
authors.forename: Ana Rita de Araujo
authors.initials: AR
authors.lastname: Nogueira
authors.forename: Marcela Maria
authors.initials: MM
authors.lastname: de Souza
authors.forename: Maurício de Alvarenga
authors.initials: Mde A
authors.lastname: Mudadu
authors.forename: Patricia
authors.initials: P
authors.lastname: Tholon
authors.forename: Antônio do Nascimento
authors.initials: Ado N
authors.lastname: Rosa
authors.forename: Rymer Ramiz
authors.initials: RR
authors.lastname: Tullio
authors.forename: Sérgio Raposo
authors.initials: SR
authors.lastname: Medeiros
authors.forename: Renata Tieko
authors.initials: RT
authors.lastname: Nassu
authors.forename: Luciana Correia de Almeida
authors.initials: LC
authors.lastname: Regitano
mesh_terms: D000824:Animal Nutritional Physiological Phenomena; D000818:Animals; D015415:Biomarkers; D002118:Calcium / Q000032:analysis*; D002135:Calcium-Binding Proteins / Q000235:genetics / Q000378:metabolism; D002154:Calpain / Q000235:genetics / Q000378:metabolism; D002417:Cattle; D005511:Food Handling; D014644:Genetic Variation; D005838:Genotype; D008460:Meat / Q000032:analysis*; D009124:Muscle Proteins / Q000235:genetics / Q000378:metabolism; D018482:Muscle, Skeletal / Q000737:chemistry; D010641:Phenotype; D020641:Polymorphism, Single Nucleotide; D011188:Potassium / Q000032:analysis*
chemical_list: D015415:Biomarkers; D002135:Calcium-Binding Proteins; D009124:Muscle Proteins; C033668:calpastatin; D002154:Calpain; C484807:CAPN1 protein, Bos taurus; D011188:Potassium; D002118:Calcium
keywords: Calpain; Calpastatin; Ionone; KCNJ11; Metal; Shear force