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Registro Completo |
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Biblioteca(s): |
Embrapa Pecuária Sul. |
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Data corrente: |
16/03/2026 |
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Data da última atualização: |
16/03/2026 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
SIMÕES, M. R. S.; CAMPOS, G. S.; GULIAS GOMES, C. C.; MILANESI, M.; GARCIA, J. F.; CAMARGO, S. S.; COMIN, H. B.; ROSSATO, A. D. P.; BOLIGON, A. A.; CARDOSO, F. F. |
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Afiliação: |
M. R. S. SIMÕES, UNIVERSIDADE FEDERAL DE PELOTAS; G. S. CAMPOS; CLAUDIA CRISTINA GULIAS GOMES, CPPSUL; M. MILANESI, UNIVERSITÀ CATTOLICA DEL SACRO CUORE; J. F. GARCIA, UNIVERSIDADE DE SÃO PAULO; S. S. CAMARGO, UNIVERSIDADE FEDERAL DO PAMPA; H. B. COMIN, UNIVERSIDADE FEDERAL DO PAMPA; A. D. P. ROSSATO, UNIVERSIDADE FEDERAL DE PELOTAS; A. A. BOLIGON, UNIVERSIDADE FEDERAL DE PELOTAS; FERNANDO FLORES CARDOSO, CPPSUL. |
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Título: |
Polygenic control of Rhipicephalus microplus infestation in purebred and crossbred cattle revealed by GWAS. |
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Ano de publicação: |
2026 |
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Fonte/Imprenta: |
Molecular and Biochemical Parasitology, v. 266, 111739, June 2026. |
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ISBN: |
https://doi.org/10.1016/j.molbiopara.2026.111739 |
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ISSN: |
0166-6851 |
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Idioma: |
Inglês |
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Conteúdo: |
Selecting cattle for enhanced resistance to ticks is essential for improving herd productivity and safeguarding animal welfare. In Brazilian production systems, tick resistance is a key factor influencing competitiveness in domestic and export-oriented beef chains. This study evaluated tick resistance in taurine and indicine cattle and their crossbreds in Rio Grande do Sul, a subtropical region where Rhipicephalus (Boophilus) microplus infestation is highly prevalent and represents the only tick species parasitizing cattle. Breed-group differences in tick counts were quantified, and the potential of genomic tools to support the selection of more resistant animals was assessed. A repeated-measures mixed model was used to compare mean tick loads and to estimate direct, maternal, and heterotic effects. Nellore cattle exhibited the lowest mean tick counts (1.00 ± 0.24), followed by Angus × Nellore (3.66 ± 0.57), Nellore × Angus (4.34 ± 0.55), Caracu × Angus (8.24 ± 0.78), Angus (10.28 ± 0.94), Angus × Hereford (12.44 ± 1.37), Hereford (12.61 ± 1.38), and Hereford × Angus (12.92 ± 1.18). Heritability and repeatability for tick infestation were 0.165 ± 0.03 and 0.179 ± 0.05, respectively. A genome-wide association study identified genomic regions on chromosomes 3, 4, 5, 16, and 22 associated with variation in tick load. Candidate genes within these regions were characterized using MeSH enrichment analyses. The results reinforce the polygenic basis of tick resistance and demonstrate the relevance of genomic information for improving selection strategies in both purebred and crossbred cattle populations. MenosSelecting cattle for enhanced resistance to ticks is essential for improving herd productivity and safeguarding animal welfare. In Brazilian production systems, tick resistance is a key factor influencing competitiveness in domestic and export-oriented beef chains. This study evaluated tick resistance in taurine and indicine cattle and their crossbreds in Rio Grande do Sul, a subtropical region where Rhipicephalus (Boophilus) microplus infestation is highly prevalent and represents the only tick species parasitizing cattle. Breed-group differences in tick counts were quantified, and the potential of genomic tools to support the selection of more resistant animals was assessed. A repeated-measures mixed model was used to compare mean tick loads and to estimate direct, maternal, and heterotic effects. Nellore cattle exhibited the lowest mean tick counts (1.00 ± 0.24), followed by Angus × Nellore (3.66 ± 0.57), Nellore × Angus (4.34 ± 0.55), Caracu × Angus (8.24 ± 0.78), Angus (10.28 ± 0.94), Angus × Hereford (12.44 ± 1.37), Hereford (12.61 ± 1.38), and Hereford × Angus (12.92 ± 1.18). Heritability and repeatability for tick infestation were 0.165 ± 0.03 and 0.179 ± 0.05, respectively. A genome-wide association study identified genomic regions on chromosomes 3, 4, 5, 16, and 22 associated with variation in tick load. Candidate genes within these regions were characterized using MeSH enrichment analyses. The results reinforce the polygenic basis of tick resistance and demonstrat... Mostrar Tudo |
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Thesagro: |
Carrapato; Melhoramento; Pecuária; Vigor Hibrido. |
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Thesaurus Nal: |
Genomics; Heterosis; Tick control. |
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Categoria do assunto: |
G Melhoramento Genético |
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Marc: |
LEADER 02560naa a2200325 a 4500
001 2185447
005 2026-03-16
008 2026 bl uuuu u00u1 u #d
022 $a0166-6851
100 1 $aSIMÕES, M. R. S.
245 $aPolygenic control of Rhipicephalus microplus infestation in purebred and crossbred cattle revealed by GWAS.$h[electronic resource]
260 $c2026
520 $aSelecting cattle for enhanced resistance to ticks is essential for improving herd productivity and safeguarding animal welfare. In Brazilian production systems, tick resistance is a key factor influencing competitiveness in domestic and export-oriented beef chains. This study evaluated tick resistance in taurine and indicine cattle and their crossbreds in Rio Grande do Sul, a subtropical region where Rhipicephalus (Boophilus) microplus infestation is highly prevalent and represents the only tick species parasitizing cattle. Breed-group differences in tick counts were quantified, and the potential of genomic tools to support the selection of more resistant animals was assessed. A repeated-measures mixed model was used to compare mean tick loads and to estimate direct, maternal, and heterotic effects. Nellore cattle exhibited the lowest mean tick counts (1.00 ± 0.24), followed by Angus × Nellore (3.66 ± 0.57), Nellore × Angus (4.34 ± 0.55), Caracu × Angus (8.24 ± 0.78), Angus (10.28 ± 0.94), Angus × Hereford (12.44 ± 1.37), Hereford (12.61 ± 1.38), and Hereford × Angus (12.92 ± 1.18). Heritability and repeatability for tick infestation were 0.165 ± 0.03 and 0.179 ± 0.05, respectively. A genome-wide association study identified genomic regions on chromosomes 3, 4, 5, 16, and 22 associated with variation in tick load. Candidate genes within these regions were characterized using MeSH enrichment analyses. The results reinforce the polygenic basis of tick resistance and demonstrate the relevance of genomic information for improving selection strategies in both purebred and crossbred cattle populations.
650 $aGenomics
650 $aHeterosis
650 $aTick control
650 $aCarrapato
650 $aMelhoramento
650 $aPecuária
650 $aVigor Hibrido
700 1 $aCAMPOS, G. S.
700 1 $aGULIAS GOMES, C. C.
700 1 $aMILANESI, M.
700 1 $aGARCIA, J. F.
700 1 $aCAMARGO, S. S.
700 1 $aCOMIN, H. B.
700 1 $aROSSATO, A. D. P.
700 1 $aBOLIGON, A. A.
700 1 $aCARDOSO, F. F.
773 $tMolecular and Biochemical Parasitology$gv. 266, 111739, June 2026.
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Embrapa Pecuária Sul (CPPSUL) |
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| 1. |  | FERREIRA, V. L.; TERRA, J. de S.; PIATTI, L.; DELATORRE, M.; STRÜSSMANN, C.; BÉDA, A. F.; KAWASHITA-RIBEIRO, R. A.; LANDGREF-FILHO, P.; AOKI, C.; CAMPOS, Z.; SOUZA, F. L.; ÁVILA, R. W.; DULEBA, S.; MARTINS, K. S.; SANTA-RITA P. H.; ALBUQUERQUE, N. R. Répteis do Mato Grosso do Sul, Brasil. Iheringia, Série Zoologia, v. 107, supl., p. 1-13, 2017.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: B - 1 |
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