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Genetic structure of red-handed howler monkey populations in the fragmented landscape of Eastern Brazilian Amazonia Genet. Mol. Biol.
Bastos,Heitor B.; Gonçalves,Evonnildo C.; Ferrari,Stephen F.; Silva,Artur; Schneider,Maria Paula C..
We genotyped 15 microsatellite loci in order to evaluate the effects of habitat fragmentation, caused by flooding of the Tucuruí reservoir, on the genetic structure of Alouatta belzebul in eastern Amazonia. The analysis included two populations sampled in 1984, representing both margins of the Tocantins river, and three populations sampled 18 years later. Minimal differences in the diversity levels between present-day (Ho = 0.62-0.69 and A R = 6.07-7.21) and pre-flooding (Ho = 0.60-0.62 and A R = 6.27-6.77) populations indicated there was no significant loss of genetic variability, possibly because of successful management strategies applied during the flooding. The changes observed were limited to shifts in the composition of alleles, which presumably...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Alouatta belzebul; Amazonia; Conservation; Genetic structure; Habitat fragmentation.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572010000400027
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Genetic variability and efficiency of DNA microsatellite markers for paternity testing in horse breeds from the Brazilian Marajó archipelago Genet. Mol. Biol.
Reis,Sávio P.; Gonçalves,Evonnildo C.; Silva,Artur; Schneider,Maria P.C..
In this study, 15 microsatellite DNA loci used in comparative tests by the International Society for Animal Genetics were applied to the evaluation of genetic diversity and management, and the efficiency of paternity testing in Marajoara horses and Puruca ponies from the Marajó Archipelago. Based on the genotyping of 93 animals, mean allelic diversity was estimated as 9.14 and 7.00 for the Marajoara and Puruca breeds, respectively. While these values are similar to those recorded in most European breeds, mean levels of heterozygosity were much lower (Marajoara 49%, Puruca 40%), probably as a result of high levels of inbreeding in the Marajó populations. The mean informative polymorphic content of this 15-marker system was over 50% in both breeds, and was...
Tipo: Info:eu-repo/semantics/other Palavras-chave: Marajoara horses; Puruca ponies; Microsatellite markers; Genetic diversity; Geneaological control.
Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572008000100014
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