Kappa-casein genotyping in tropical milking Criollo and its association to milk production and composition.
Trop Anim Health Prod
; 52(6): 3885-3888, 2020 Nov.
Article
en En
| MEDLINE
| ID: mdl-32588361
ABSTRACT
Caseins are abundant proteins in milk and found in four types (αS1, αS2, ß, and κ). There is substantial variation in the allelic and genotypic frequencies of the κ-casein gene in different cattle breeds, although the tropical milking Criollo (TMC) has not yet been investigated. The aim was to determine the allelic and genotypic frequencies in the κ-casein gene for two alleles (A and B) in TMC and further investigate its association to milk production and composition. A total of 180 TMC females were genotyped from blood samples. κ-Casein genotyping was performed using restriction fragment length polymorphism (RFLP) after polymerase chain reaction (PCR)-based amplification of genomic DNA. Allele frequencies were 0.39 for A-allele and 0.61 for B-allele (P < 0.05). Genotype frequencies were 0.09 (AA), 0.60 (AB), and 0.31 (BB) (P < 0.05). The κ-casein genotype in TMC cows did not affect milk yield or composition. In sum, the TMC has high frequencies of the B-allele and AB/BB genotypes, although there are no association of such genotypes and milk traits.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Bovinos
/
Caseínas
/
Leche
/
Genotipo
Tipo de estudio:
Risk_factors_studies
Límite:
Animals
País/Región como asunto:
America do sul
/
Brasil
Idioma:
En
Revista:
Trop Anim Health Prod
Año:
2020
Tipo del documento:
Article
País de afiliación:
México