2020
DOI: 10.37496/rbz4920190115
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Abstract: The objective was to evaluate factors that influence calving probability in the first and second reproductive years of beef heifers that reached the minimum recommended body weight (BW) in the first breeding season. Two hundred twentyseven 24-month-old Charolais × Nellore heifers that mated between 2003 and 2012 were analyzed. The parameters evaluated were: year effect; individual and maternal heterozygosis; percentage of Charolais genotype; average daily gain (ADG) from weaning to the end of the first breedin… Show more

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Cited by 4 publications
(4 citation statements)
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“…On the contrary, with the use of postpartum supplementation (Farias et al, 2018a,b) or calcium salt supplementation in the pre-and postpartum periods in adult cows (Vara et al, 2020), pregnancy rates are influenced by cow body size. The probability of pregnancy is directly related to the nutritional status of the cow as well as to its current energy balance, and its prolongation is harmful to the subsequent reproductive performance (Pacheco et al, 2020a;Torres, Tineo, & Raidan, 2015). In the present study, the supplementation provided in the postpartum period may have influenced the results, as the cows were not subjected to a drastic negative energy balance, which led to satisfactory reproductive performances regardless of BMI class.…”
Section: Resultsmentioning
confidence: 67%
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“…On the contrary, with the use of postpartum supplementation (Farias et al, 2018a,b) or calcium salt supplementation in the pre-and postpartum periods in adult cows (Vara et al, 2020), pregnancy rates are influenced by cow body size. The probability of pregnancy is directly related to the nutritional status of the cow as well as to its current energy balance, and its prolongation is harmful to the subsequent reproductive performance (Pacheco et al, 2020a;Torres, Tineo, & Raidan, 2015). In the present study, the supplementation provided in the postpartum period may have influenced the results, as the cows were not subjected to a drastic negative energy balance, which led to satisfactory reproductive performances regardless of BMI class.…”
Section: Resultsmentioning
confidence: 67%
“…Cows that gain weight between mating and calving are more likely to repeat pregnancy, especially during the growing phase (Pacheco et al, 2020a). However, in pasture-based production systems, fluctuations in the quantity and quality of forage can compromise the nutritional status of dams at some times of the year (Gutiérrez et al, 2014).…”
Section: Resultsmentioning
confidence: 99%
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