Abstract

DO AMARAL, Crispim Bruno et al. Allelic discrimination in naturalized ovine from Pantanal Sul-Matogrossense by means of microsatellite markers. J. Selva Andina Res. Soc. [online]. 2012, vol.3, n.1, pp.3-13. ISSN 2072-9294.

The molecular biology techniques that are used in allelic discrimination for individual and sheep breeds characterization are important tools in breeding programs and conservation of genetic resources. The use of microsatellite markers allows allelic differentiation, which in turn allows us to infer the genetic variability of sample populations. The study aimed to test the sensitivity and efficiency of fluorescent capillary electrophoresis, using microsatellite primers, for allelic discrimination of the Crioulo breed from Pantanal sul-matogrossense, as well as verify the possibility of using the products of sequencing in genetic variability analysis. For this test, were used blood samples from Pantaneira breed sheep. The allelic discrimination of eight microsatellites was determined by capillary electrophoresis in automatic sequencer and the results analyses were performed on the programs CERVUS and Dendro-UPGMA. The results indicated the possibility of using this technique for the individual genotyping of all loci tested in electrophoretic analysis and its potential to allelic discrimination even in case of difference between two pairs of bases between the alleles. The resulting dendrogram based on the distance matrix by the UPGMA assembly method, indicated medium similarity coefficient of 0.72 in the group of animals. It was concluded that there is the viability and efficiency of the microsatellite molecular markers technique using capillary electrophoresis for allelic discrimination and the utility of results for studies of genetic variability, paternity diagnosis and characterization of the Crioulo sheep herd from Pantanal sul-matogrossense.

Keywords : Molecular markers; multiplex PCR; genetic diversity; sheep; genetic resources.

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