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Association between reproductive traits and four microsatellites in Brangus-Ibagé cattle Genet. Mol. Biol.
Oliveira,João F.C. de; Neves,Jairo P.; Almeida,Eric A.; Steigleder,Clara Sabina; Moraes,José Carlos F.; Gonçalves,Paulo Bayard D.; Weimer,Tania A..
The aim of the present study was to verify associations between reproductive efficiency and four microsatellite markers located in synteny with genes involved in the regulation of reproductive mechanisms. A sample of 107 females from a Brangus Ibagé population (5/8 Aberdeen Angus x 3/8 Nelore) was characterized for ETH225 (D9S1) and MM12E6 (D9S20) microsatellites, mapped on chromosome 9, and HEL5 (D21S15) and AFZ1 (D21S37) on chromosome 21. Associations between the genetic markers and reproductive efficiency were determined by one-way analysis of variance using calving interval (CI), live weight at calving (LWC), live weight at first calving (LW1C) and live weight at second calving (LW2C) as dependent variables. The genotypes were classified according to...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bovine; IGF-I receptor; Estrogen receptor; Reproductive efficiency.
Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572005000100010
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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
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