Association between reproductive traits and four microsatellites in Brangus-Ibagé cattle

Oliveira, João Francisco Coelho de; Neves, Jairo Pereira; Almeida, Erik Amazonas de; Steigleder, Clara Sabina; Moraes, J. C. F.; Gonçalves, Paulo Bayard Dias; Weimer, Tânia de Azevedo

doi:10.1590/s1415-47572005000100010

Cited by 9 publications

(16 citation statements)

References 17 publications

(17 reference statements)

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“…The higher variability in STR systems observed in Brangus Ibagé as compared to the other two 682 Bovine LEPR gene polymorphisms breeds probably results from its crossbreeding composition. High levels of STR genetic diversity in the BI herd has already been described (Almeida et al, 2003(Almeida et al, , 2007Duarte et al, 2005;Oliveira et al, 2005). The Charolais herd presented the highest variability concerning the T945M polymorphism.…”

Section: Discussionmentioning

confidence: 80%

Genetic polymorphisms at the leptin receptor gene in three beef cattle breeds

et al. 2008

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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 suggest that the LEPR gene polymorphisms, at least those herein described, do not influence postpartum cows production.

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Section: Discussionmentioning

confidence: 80%

Genetic polymorphisms at the leptin receptor gene in three beef cattle breeds

et al. 2008

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“…In our study, we observed an increase in minor spermatozoa defects in bulls carrying a longer AFZ1 allele (121 and 127 bp) compared to animals carrying the short allele (113 and 119 bp). Oliveira et al (2005) evaluated the AFZ1 marker in a herd of Ibagé cows and found a significant effect from the favorable genotypes for AFZ1 microsatellites compared to a lower calving interval. In addition, the presence of the AFZ1 allele showed an association with beef cow pregnancy rates when fixed-time artificial insemination was used (OLIVEIRA et al, 2005;SILVEIRA et al, 2013).…”

Section: Discussionmentioning

confidence: 99%

“…Oliveira et al (2005) evaluated the AFZ1 marker in a herd of Ibagé cows and found a significant effect from the favorable genotypes for AFZ1 microsatellites compared to a lower calving interval. In addition, the presence of the AFZ1 allele showed an association with beef cow pregnancy rates when fixed-time artificial insemination was used (OLIVEIRA et al, 2005;SILVEIRA et al, 2013). These results demonstrate a significant association between the markers associated with IGF-IR and the reproductive performance of beef cows.…”

Section: Discussionmentioning

confidence: 99%

“…HEL5 and AFZ1, located on BTA21 of the insulin growth factor I receptor (IGF-IR) gene, are markers showing an association with greater calving interval (BARENDSE et al, 1997;OLIVEIRA et al, 2005). The leptin (LEP) gene is directly related to the presence of alleles for IDVGA-51 located on the BTA4 that indicate an increasing calving interval in cows (ALMEIDA et al, 2000).…”

Section: Introductionmentioning

confidence: 99%

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Candidate genes related to reproductive traits of Hereford and Braford bulls

Menegassi

Pereira

Aguiar

et al. 2018

SCA

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This study emphasized the importance of using candidate genes in predicting semen quality in bulls that can be used in cow-calf production. The aim of this study was to evaluate some candidate genes related to reproductive traits in Braford and Hereford bulls. All bulls (n=188) were submitted to breeding soundness evaluations at 24, 28, 32, and 36 months of age. The microsatellite markers ILSTS002 and BMS3004 associated with the luteinizing hormone-β (LHβ) gene, IDVGA-51 to leptin (LEP) gene, HEL5 and AFZ1 within the IGF-IR gene, and two SNP markers (LHR and FSHR) associated with the LHR and FSHR genes, respectively, were evaluated by the amplification of DNA products. The variation in the IDVGA-51 allele 177-185 showed polymorphic information content (PIC) associated with sperm motility and vigor traits in Hereford bulls. Hereford animals showed PIC of 0.36 to 0.75% along with expected heterozygosity (H) of 0.49 to 0.78%. Braford bulls that indicated the ILSTS002 allele 137-175 and AFZ1 allele 113-119 showed PIC associated with major and minor defects, respectively. The PIC ranged from 0.28 to 0.78%, with an expected H of 0.35 to 0.81%. AFZ1 allele 121-127 had the highest minor defects and ILSTS002 allele 125-135 showed the highest major defects from ejaculated semen in Braford bulls. In addition, IDVGA-51 allele 175 showed lower motility and vigor in Hereford bulls. The markers AFZ1 (IGF-IR) and ILSTS002 (LHβ) in Braford and IDVGA-51 (LEP) in Hereford bulls were effective in verifying the reproductive traits of the bulls. Key words: Molecular markers. Single nucleotide polymorphisms. Microsatellites. Genetic variability. Braford and Hereford breeds. ResumoEste estudo enfatizou a importância do uso de genes candidatos na predição da qualidade do sêmen em touros que podem ser utilizados na produção de bezerros. O objetivo deste estudo foi avaliar alguns

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“…Oliveira et al (2005) relatam associações entre genótipos favoráveis para os marcadores HEL5 e AFZ-1 associados ao gene do receptor para o IGF-1 (IGF-1R) e desempenho reprodutivo. Weimer et al (2007) No presente trabalho, buscou-se uma associação entre a taxa de natalidade em vacas de corte Aberdeen Angus e marcadores moleculares e polimorfismos em genes relacionados à reprodução, como IGF1-R, LHβ, Leptina, FSHR e LHR.…”

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