CORRELAÇÃO ENTRE A CARACTERIZAÇÃO ZOOTÉCNICA E TRANSAÇÕES COMERCIAIS DE TOUROS NELORE PADRÃO, NELORE MOCHO E SINDI NA REGIÃO NORDESTE GOIÁS E SUDESTE DO TOCANTINS

Abstract

Brazil stands out in cattle breeding, especially in regions such as Goiás, where approximately 10% of the national herd is concentrated. Beef cattle farming is predominant, with breeds such as Standard Nelore, Mocho Nelore and Sindi widely used as breeding stock. Reproductive management is still mostly based on natural breeding, with only 21% of females undergoing artificial insemination. The quality of bulls plays a crucial role in the future performance of calves, and evaluating them is a complex task that considers several genetic, environmental and financial factors. For this evaluation, research is underway to find effective methods, including visual analysis by EPMURAS. This study aims to correlate the quality of bulls with their zootechnical characteristics and market aspects, providing a more comprehensive understanding of this important segment of Brazilian livestock. The research was conducted through the collection of quantitative and qualitative data, obtained from the company’s production and administrative control records. These data fed the agricultural management program and the control of animals of the Standard Nelore, Mocho Nelore and Sindi breeds, in collaboration with the Brazilian Association of Zebu Breeders (ABCZ). The results indicated that only the IABCZ index was significant under the influence of animal classifications A and B. Notably, the value of the IABCZ index was higher in classification A compared to classification B (17.28±0.53 vs. 8.77±0.51). In the evaluation of the DECA, body structure, precocity, musculature, navel, E.C.C, breed, posture and sexuality indexes, it was observed that the DECA, Precocity, Musculature, E.C.C and Breed indexes were influenced by the animal classification (A and B), differing from each other. However, only the DECA index was significant (P<0.001). The value of the commercial transactions observed in the data analysis showed the highest commercial value resulting from the best performance of the animals during the evaluation period on the farms and from the best genotypic expression. Regarding the Pearson correlation coefficients, it was observed that for Epmuras x IABCZ, Epmuras x Value, as well as DECA x IABCZ were statistically significant (p<0.001). Thus, it is evident that animal classification influences several zootechnical indexes, with IABCZ and DECA standing out as important criteria for the selection and genetic improvement of the Standard Nelore herd. Therefore, it is concluded that there was a positive correlation between the zootechnical characteristics of the Nelore and Sindi bulls and commercial transactions.