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Bonamy M, de Iraola JJ, Prando AJ, Baldo A, Giovambattista G, Rogberg-Muñoz A. Application of longitudinal data analysis allows to detect differences in pre-breeding growing curves of 24-month calving Angus heifers under two pasture-based systems with differential puberty onset. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2020; 100:714-720. [PMID: 31597200 DOI: 10.1002/jsfa.10072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2017] [Revised: 09/23/2019] [Accepted: 09/28/2019] [Indexed: 06/10/2023]
Abstract
BACKGROUND Longitudinal data analysis contributes to detect differences in the growing curve by exploiting all the information involved in repeated measurements, allowing to distinguish changes over time within individuals, from differences in the baseline levels among groups. In this research, longitudinal and cross-sectional analysis were compared to evaluate differences in growth in Angus heifers under two different grazing conditions, ad libitum (AG) and controlled (CG) to gain 0.5 kg day-1 . RESULTS Longitudinal mixed models show differences in growing curve parameters between grazing conditions, that were not detected by cross-sectional analysis. Differences (P < 0.05) in first derivative of growth curves (daily gain) until 289 days were observed between treatments, AG being higher than CG. Correspondingly, pubertal heifer proportion was also higher in AG at the end of rearing (AG, 0.94; CG, 0.67). CONCLUSION In longitudinal studies, the power to detect differences between groups increases by exploiting the whole information of repeated measures, modelling the relation between measurements performed on the same individual. Under a proper analysis, valid conclusion can be drawn with fewer animals in the trial, improving animal welfare and reducing investigation costs. © 2019 Society of Chemical Industry.
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Affiliation(s)
- Martín Bonamy
- Cátedra de Producción de Bovinos, Departamento de Producción Animal, Facultad de Ciencias Veterinarias, Universidad Nacional de La Plata, La Plata, Argentina
- Facultad de Ciencias Veterinarias UNLP, IGEVET - Instituto de Genética Veterinaria (UNLP-CONICET LA PLATA), La Plata, Argentina
| | - Julieta J de Iraola
- Cátedra de Producción de Bovinos, Departamento de Producción Animal, Facultad de Ciencias Veterinarias, Universidad Nacional de La Plata, La Plata, Argentina
- Facultad de Ciencias Veterinarias UNLP, IGEVET - Instituto de Genética Veterinaria (UNLP-CONICET LA PLATA), La Plata, Argentina
| | - Alberto J Prando
- Cátedra de Producción de Bovinos, Departamento de Producción Animal, Facultad de Ciencias Veterinarias, Universidad Nacional de La Plata, La Plata, Argentina
| | - Andrés Baldo
- Cátedra de Producción de Bovinos, Departamento de Producción Animal, Facultad de Ciencias Veterinarias, Universidad Nacional de La Plata, La Plata, Argentina
| | - Guillermo Giovambattista
- Facultad de Ciencias Veterinarias UNLP, IGEVET - Instituto de Genética Veterinaria (UNLP-CONICET LA PLATA), La Plata, Argentina
| | - Andrés Rogberg-Muñoz
- Facultad de Ciencias Veterinarias UNLP, IGEVET - Instituto de Genética Veterinaria (UNLP-CONICET LA PLATA), La Plata, Argentina
- Departamento de Producción Animal, Facultad de Agronomía, Universidad de Buenos Aires, Buenos Aires, Argentina
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Association of a Cac8I polymorphism in the IGF1 gene with growth traits in Indian goats. J Genet Eng Biotechnol 2017; 15:7-11. [PMID: 30647636 PMCID: PMC6296596 DOI: 10.1016/j.jgeb.2017.04.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2016] [Revised: 01/06/2017] [Accepted: 04/05/2017] [Indexed: 11/20/2022]
Abstract
The Insulin-like Growth Factor 1 (IGF1) gene is a member of somatotropic axis and plays a key role in proliferation of cells, mitosis, myogenesis, meiosis, differentiation in foetal development and post natal growth. The objectives of this study were to verify the single nucleotide polymorphisms (SNPs) in IGF1 gene and their association with growth traits in two indigenous native goat genetic groups of Kerala, viz., Malabari and Attappady Black. A total of 277 goats were genotyped using a polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) using the restriction enzyme Cac8I. One SNP, A224G was detected in the 5′ non-coding region of the IGF1 gene, and accordingly two genotypes were revealed, GG and AG. This SNP was significantly associated with growth traits in Attappady Black goats, which is maintained as meat breed in Kerala. Results from this study demonstrated higher performance of GG animals for growth traits. The association of IGF1 gene with these traits emphasizes the importance of caprine IGF1 as a candidate gene for growth traits in goat breeding.
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Cardona SJC, Cadavid HC, Corrales JD, Munilla S, Cantet RJC, Rogberg-Muñoz A. Longitudinal data analysis of polymorphisms in the κ-casein and β-lactoglobulin genes shows differential effects along the trajectory of the lactation curve in tropical dairy goats. J Dairy Sci 2016; 99:7299-7307. [PMID: 27423955 DOI: 10.3168/jds.2016-10954] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2016] [Accepted: 06/07/2016] [Indexed: 01/19/2023]
Abstract
The κ-casein (CSN-3) and β-lactoglobulin (BLG) genes are extensively polymorphic in ruminants. Several association studies have estimated the effects of polymorphisms in these genes on milk yield, milk composition, and cheese-manufacturing properties. Usually, these results are based on production integrated over the lactation curve or on cross-sectional studies at specific days in milk (DIM). However, as differential expression of milk protein genes occurs over lactation, the effect of the polymorphisms may change over time. In this study, we fitted a mixed-effects regression model to test-day records of milk yield and milk quality traits (fat, protein, and total solids yields) from Colombian tropical dairy goats. We used the well-characterized A/B polymorphisms in the CSN-3 and BLG genes. We argued that this approach provided more efficient estimators than cross-sectional designs, given the same number and pattern of observations, and allowed exclusion of between-subject variation from model error. The BLG genotype AA showed a greater performance than the BB genotype for all traits along the whole lactation curve, whereas the heterozygote showed an intermediate performance. We observed no such constant pattern for the CSN-3 gene between the AA homozygote and the heterozygote (the BB genotype was absent from the sample). The differences among the genotypic effects of the BLG and the CSN-3 polymorphisms were statistically significant during peak and mid lactation (around 40-160 DIM) for the BLG gene and only for mid lactation (80-145 DIM) for the CSN-3 gene. We also estimated the additive and dominant effects of the BLG locus. The locus showed a statistically significant additive behavior along the whole lactation trajectory for all quality traits, whereas for milk yield the effect was not significant at later stages. In turn, we detected a statistically significant dominance effect only for fat yield in the early and peak stages of lactation (at about 1-45 DIM). The longitudinal analysis of test-day records allowed us to estimate the differential effects of polymorphisms along the lactation curve, pointing toward stages that could be affected by the gene.
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Affiliation(s)
- Samir Julián Calvo Cardona
- Grupo de Investigación en Genética, Mejoramiento y Modelación Animal (GaMMA), Facultad Ciencias Agrarias, Universidad de Antioquia, Calle 67, no 53-108, AA 1226, Medellín, Colombia 005043
| | - Henry Cardona Cadavid
- Grupo de Investigación en Genética, Mejoramiento y Modelación Animal (GaMMA), Facultad Ciencias Agrarias, Universidad de Antioquia, Calle 67, no 53-108, AA 1226, Medellín, Colombia 005043
| | - Juan David Corrales
- Facultad Ciencias Agropecuarias, Universidad de La Salle, Bogotá, Colombia 110231; Departamento de Producción, Facultad de Agronomía, Universidad de Buenos Aires, San Martín 4453 (1417), Ciudad Autónoma de Buenos Aires, Argentina
| | - Sebastián Munilla
- Departamento de Producción, Facultad de Agronomía, Universidad de Buenos Aires, San Martín 4453 (1417), Ciudad Autónoma de Buenos Aires, Argentina
| | - Rodolfo J C Cantet
- Departamento de Producción, Facultad de Agronomía, Universidad de Buenos Aires, San Martín 4453 (1417), Ciudad Autónoma de Buenos Aires, Argentina; Unidad Ejecutora de Investigaciones en Producción Animal (INPA), Universidad de Buenos Aires - Consejo Nacional de Investigaciones Científicas y Técnicas, Cdad. Atma. Buenos Aires (1417), Argentina
| | - Andrés Rogberg-Muñoz
- Departamento de Producción, Facultad de Agronomía, Universidad de Buenos Aires, San Martín 4453 (1417), Ciudad Autónoma de Buenos Aires, Argentina; IGEVET-Instituto de Genética Veterinaria "Ing. Fernando Noel Dulout" (UNLP - CONICET La Plata), Facultad de Ciencias Veterinarias, Universidad Nacional de La Plata, Calle 60 y 118 S/N, La Plata, Argentina 1900.
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