Efecto de la transicion adenina/guanina del gen de la prolactina bovina sobre características de importancia en producción lechera
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Date
2010
Journal Title
Journal ISSN
Volume Title
Publisher
Corporación Universitaria Lasallista
Abstract
Abstract
Introduction. Among the most important characteristics of Dairy cattle, milk production and quality
are remarked. Among the important hormones for
these processes, growth hormone and prolactin are
highlighted. Prolactin has many functions; therefore
polymorphic sequences have been searched in the
gen that codifies that protein, by the use of molecular
techniques to detect polymorphisms in specific DNA
regions. This is useful to make genetic maps and
evaluate the effect on the characteristic’s expression. Objective. To determine allelic and phenotypic
frequencies of the prolactin gen and the association
between its polymorphisms and some production
characteristics. Materials and methods. The determination of genotypes was made by means of PCRRFLP, with DNA extracted from peripheral blood by
salting out. 470 lactations from 165 Holstein cows
were analyzed, and a follow–up to their milk production and composition was made during a minimum a
complete lactation. Results. The most frequent allele
for the PRL gen was PRLA (0.91); the most frequent
genotype was AA (0.83) while the less frequent was
PRLBB (0.02); Milk production, protein percentage
and protein quantity had a significant statistic difference, and the others had no significance. Conclusion. These results match those achieved by other
researchers. Therefore, individuals with favorable
phenotypes must be found through selection and
they must be used in genetic increase programs.
Description
Keywords
Producción de leche, Corporación Universitaria Lasallista, Leche - Control de calidad, Leche - Análisis, Prolactina, Genética de ganado vacuno, Ganado lechero, Ganado lechero - Mejoramiento de la especie