SciELO - Scientific Electronic Library Online

vol.30 issue2Epipodium Morphology of Prisogaster niger (Mollusca: Vetigastropoda): Revealing Potential Autapomorphies of Diagnostic Value for the PrisogasterinaeRegression Equation from Dual Energy X Ray Absorptiometry (DEXA) for Estimating Muscle Mass Segment author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand




Related links


International Journal of Morphology

On-line version ISSN 0717-9502


QUINONES, J; BRAVO, S; PAZ, E  and  SEPULVEDA, N. Detection of MT1 Melatonin Receptor Gene Polymorphism (MT1) in the Araucana Creole Sheep. Int. J. Morphol. [online]. 2012, vol.30, n.2, pp.546-549. ISSN 0717-9502.

Melatonin is a hormone that regulates circadian rhythms and many of the reproductive aspects of mammals and is secreted by the pineal gland during the hours of absence of light. This hormone has high affinity receptors coupled to G-like proteins, termed MT1. A polymorphism of the sequence coding for these receptors was involved in the control of seasonal reproduction in sheep. The purpose of this study was to determine the presence of MT1 receptor polymorphism in Araucana creole sheep, a local breed with a short reproductive anestrus. To carry out this work, we used a technique called polymerase chain reaction-restriction fragment lengh polymorphism PCR-RFLP, for which samples were obtained from genomic DNA of 50 Araucana sheep, which were digested with Mnl1 restriction endonuclease. It was possible to identify the presence of MT1 receptor polymorphism in Araucana sheep. The genotypes were found in a genotype frequency of 68% for genotype + / +, 28% for genotype + / - y4% for genotype - / -. This high percentage of animals with genotype + / + could explain the short reproductive anestrus featuring this breed.

Keywords : Sheep reproduction; Seasonal reproduction; Molecular markers.

        · abstract in Spanish     · text in Spanish     · Spanish ( pdf )


Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License