| Journal: | Scientia Agricola |
| Database: | PERIÓDICA |
| System number: | 000455436 |
| ISSN: | 0103-9016 |
| Authors: | Fernandes, Tiago Albandes1 Vaz, Ricardo Zambarda2 Restle, João3 Cerdótes, Liliane4 Nuñez, Amoracyr José Costa3 Costa, Pablo Tavares1 Ferreira, Otoniel Geter Lauz1 |
| Institutions: | 1Universidade Federal de Pelotas, Departamento de Zootecnia, Pelotas, Rio Grande do Sul. Brasil 2Universidade Federal de Santa Maria, Departamento de Zootecnia e Ciencias Biologicas, Palmeira das Missoes, Rio Grande do Sul. Brasil 3Universidade Federal de Goias, Departamento de Zootecnia, Goiania, Goias. Brasil 4Instituto Federal de Educacao, Ciencia e Tecnologia Catarinense, Departamento de Ensino, Pesquisa e Extensao, Santa Rosa do Sul, Santa Catarina. Brasil |
| Year: | 2022 |
| Volumen: | 79 |
| Number: | 5 |
| Country: | Brasil |
| Language: | Inglés |
| Document type: | Artículo |
| Approach: | Analítico, descriptivo |
| English abstract | Heterosis plays an important role on yield and profitability of beef production systems. This study evaluates the morphometrics of purebred Nellore (N) and Charolais (C) animals and of the second (G2) and third (G3) generations of their alternating crosses, regarding the effects of genetic group and heterosis from birth to 365 days of age. The experiment comprised 159 calves (C = 29, N = 22, G2 - 3/4C 1/4N = 21, 3/4N 1/4C = 9, G3-5/8C 3/8N = 44 and 5/8N 3/8C = 34). The foreshank girth (FG), thoracic girth (TG), body length (BL), and hip height (HH) were measured after birth, and at 63, 210, and 365 days of age, and the total increases were calculated. The Charolais animals had greater FG, TG, and BL values than Nellore, while the latter had greater HH. For the offspring generations, the predominance of Charolais genes in the genotypes resulted in greater measurements for FG and TG in G2, whereas the predominance of Nellore genes resulted in higher HH values in both generations. The crossbred animals had greater values for all measurements than the purebreds, with more significant differences in FG, TG, and BL compared to Nellore purebreds and in HH compared to Charolais. Charolais animals show higher values for muscularity; while, Nellore animals are taller. Crossbred animals show greater development compared to purebreds, indicating a significant effect of heterosis |
| Disciplines: | Medicina veterinaria y zootecnia |
| Keyword: | Bovinos, Reproducción y genética animal, Biometría, Variación genética, Apareamiento |
| Keyword: | Bovines, Animal reproduction and genetics, Biometry, Genetic variation, Mating |
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