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Registros recuperados: 4
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Accuracy of genomic selection predictions for hip height in Brahman cattle using different relationship matrices PAB
Farah,Michel Marques; Fortes,Marina Rufino Salinas; Kelly,Matthew; Porto-Neto,Laercio Ribeiro; Meira,Camila Tangari; Carreño,Luis Orlando Duitama; Fonseca,Ricardo da; Moore,Stephen Stewart.
Abstract: The objective of this work was to evaluate the effects of genomic information on the genetic evaluation of hip height in Brahman cattle using different matrices built from genomic and pedigree data. Hip height measurements from 1,695 animals, genotyped with high-density SNP chip or imputed from 50 K high-density SNP chip, were used. The numerator relationship matrix (NRM) was compared with the H matrix, which incorporated the NRM and genomic relationship (G) matrix simultaneously. The genotypes were used to estimate three versions of G: observed allele frequency (HGOF), average minor allele frequency (HGMF), and frequency of 0.5 for all markers (HG50). For matrix comparisons, animal data were either used in full or divided into calibration (80%...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bos indicus; Beef cattle; Genomics; Rare alleles.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2018000600717
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Candidate mutations used to aid the prediction of genetic merit for female reproductive traits in tropical beef cattle R. Bras. Zootec.
Fortes,Marina Rufino Salinas; Enculescu,Charmaine; Porto Neto,Laercio R.; Lehnert,Sigrid A.; McCulloch,Russell; Hayes,Ben.
ABSTRACT In this study, we aimed to provide a wet laboratory validation for a set of single nucleotide polymorphisms (SNP), which had been identified as candidate functional variants in silico. Genotyping for candidate SNP was performed in Brahman and Tropical Composite cattle. After quality control, 29 SNP were first investigated individually for their association with female reproductive traits and then used as a panel for genomic predictions. The reproductive traits studied were age at first corpus luteum (AGECL; days), post-partum anoestrus interval (PPAI; days), and a binary trait that described if the cow had ovulated before weaning the first calf or not (PW, 0-1). Single nucleotide polymorphisms in six genes (FOXA2, TRAF4, IRF2, IRF1, BPTF, and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Anoestrus; BayesR; Candidate genes; Genomic prediction; Heifer puberty.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982018000100412
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Candidate SNPs for carcass and meat traits in Nelore animals and in their crosses with Bos taurus PAB
Curi,Rogério Abdallah; Krauskopf,Monique Marcondes; Hadlich,Janaína Conte; Fortes,Marina Rufino Salinas; Vankan,Dianne Margaret; Silva,Josineudson Augusto II Vasconcelos; Oliveira,Henrique Nunes de; Mota,Marcílio Dias Silveira da.
The objective of this work was to evaluate the effects of single-nucleotide polymorphisms (SNPs) in the genes IGF1 (AF_017143.1:g.198C>T), MSTN (AF_320998.1:g.433C>A), MYOD1 (NC_007313:g.1274A>G) and MYF5 (NC_007303:g.1911A>G) on carcass and meat traits in Nelore (Bos indicus) and Nelore x B. taurus. A total of 300 animals were genotyped and phenotyped for rib eye area (REA), backfat thickness (BT), intramuscular fat (IF), shear force (SF) and myofibrillar fragmentation index (MFI). The effects of allele substitution for each SNP were estimated by regression of the evaluated phenotypes on the number of copies of a particular allele using the general linear model. The polymorphism at IGF1 was non-informative in Nelore animals. In crossbred...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bos indicus; Candidate gene; Fat deposition; Meat tenderness; Polymorphism.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2012000200019
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Genetic polymorphisms related to meat traits in purebred and crossbred Nelore cattle PAB
Curi,Rogério Abdallah; Fortes,Marina Rufino Salinas; Chardulo,Luis Artur Loyola; Silveira,Antonio Carlos; Arrigoni,Mário De Beni; Martins,Cyntia Ludovico; Assumpção,Mayra Elena Ortiz D' Avila; Oliveira,Henrique Nunes de.
The objective of this work was to estimate the allelic and genotypic frequencies of CAST/XmnI, a calpastatin gene polymorphism, and CAPN530, a calpain 1 large subunit gene polymorphism, in different beef genetic groups (Nelore and Nelore x Bos taurus), and to investigate associations between these polymorphisms and carcass and meat traits. Three hundred animals - comprising 114 Nelore, 67 Angus x Nelore, 44 Rubia Gallega x Nelore, 41 Canchim, 19 Brangus three-way cross and 15 Braunvieh three-way cross- were genotyped by PCR-RFLP and phenotyped for rib-eye area (REA), back-fat thickness (BT), intramuscular fat (IF), shear force (SF) and myofibrillar fragmentation index (MFI). The occurrence of the two alleles of the CAST/XmnI and CAPN530 single nucleotide...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bos indicus; Calpain gene; Calpastatin gene; Meat tenderness; Single nucleotide polymorphisms.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2009001200015
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