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	Provedor de dados Genet. Mol. Biol. (2) Autor Moraes,José C.F. (2) Almeida,Sabrina E.M. (1) Corbellini,Ângela O. (1) Edelweiss,Maria I.A. (1) Gonçalves,Paulo B.D. (1) Horn,Marilise M. (1) Jaume,Carlos M. (1) Kirst,Cláudia (1) Lopes,Beatriz M.T. (1) Neves,Jairo P. (1) Passos,Daniel T. (1) Rosado,Adriano (1) Santos,Luciana B.S. (1) Terra,Gustavo (1) Weimer,Tania de Azevedo (1) Mais... Palavra-chave Bulls (1) Cattle production (1) Genetic diversity (1) LEPR gene polymorphisms (1) Molecular markers (1) Semen quality (1) Synthetic breeds of cattle (1) Y chromosome (1) Mais... Tipo do documento Info:eu-repo/semantics/article (2) Ano 2008 (1) 2005 (1) País Brazil (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Genetic polymorphisms at the leptin receptor gene in three beef cattle breeds Genet. Mol. Biol. Almeida,Sabrina E.M.; Santos,Luciana B.S.; Passos,Daniel T.; Corbellini,Ângela O.; Lopes,Beatriz M.T.; Kirst,Cláudia; Terra,Gustavo; Neves,Jairo P.; Gonçalves,Paulo B.D.; Moraes,José C.F.; Weimer,Tania de Azevedo. The genetic diversity of a single nucleotide polymorphism (SNP) at the exon 20 (T945M) of the leptin receptor gene (LEPR) and of three short tandem repeats (STRs BM7225, BMS694, and BMS2145) linked to LEPR was investigated in three beef cattle herds (Brangus Ibagé, Charolais, and Aberdeen Angus). A cheap and effective new method to analyze the T945M polymorphism in cattle populations was developed and the possible role of these polymorphisms in reproduction and weight gain of postpartum cows was evaluated. High levels of genetic diversity were observed with the average heterozygosity of STRs ranging from 0.71 to 0.81. No significant association was detected between LEPR markers and reproductive parameters or daily weight gain. These negative results... Tipo: Info:eu-repo/semantics/article Palavras-chave: Molecular markers; Genetic diversity; Cattle production; LEPR gene polymorphisms. Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572008000400013 Reproductive deficiency in bulls from synthetic breeds according to the type of crossbreed and the morphology of the Y chromosome Genet. Mol. Biol. Horn,Marilise M.; Moraes,José C.F.; Jaume,Carlos M.; Edelweiss,Maria I.A.; Rosado,Adriano. We used 550 Braford and 214 Brangus-Ibagé bulls to study the association between Y chromosome morphology and the evaluation of breeding-soundness, karyotyping and breeding records were used to assess Y chromosome morphology. In general, no direct association was detected between the individual type of Y chromosome and reproductive fitness as previously estimated through breeding soundness examination. The type of breeding strategy used to form the synthetic breeds was also analyzed. The Braford breed is about 3/8 Zebu (Bos taurus indicus) and 5/8 Hereford (Bos taurus taurus) but when the breeding strategy used 1/4 Zebu animals to produce Braford bulls which were 3/8 Zebu a greater percentage of the bulls had to be culled due to reproductive problems. Our... Tipo: Info:eu-repo/semantics/article Palavras-chave: Bulls; Semen quality; Y chromosome; Synthetic breeds of cattle. Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572005000200008 Registros recuperados: 2 Primeira ... 1 ... Última

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