Effects of nutrient restriction on the metabolic profile of Bos indicus-influenced and B. taurus suckled beef cows
نویسندگان
چکیده
Abstract Recent research from our group demonstrated that Bos indicus-influenced suckled beef cows had greater resilience to withstand nutrient restriction and establish pregnancy compared with B. taurus exposed the same conditions. To further understand these findings, differences in metabolic profile between females were explored. Suckled (n = 134) enrolled a completely randomized design 2 × factorial arrangement of treatments. On day − 21, Angus (AN; taurus) Brangus (BN; indicus-influenced) randomly assigned 1) diet met daily energy maintenance requirements (MAINT), or 2) restricted intake 70% (RESTR). Cows an estrus synchronization protocol received embryo 7 d after ovulation was pharmacologically induced on 0. Blood samples collected days − 21 19 determine circulating concentrations non-esterified fatty acids (NEFA), β-hydroxybutyrate (BHB), insulin, glucose, IGF-1. Pregnancy status transfer determined 28. As consequence proposed diets, RESTR less body condition score (BCS) (P 0.008) across breed types. Moreover, BCS change included as independent covariate into subsequent analyses, allowing for comparison types under equivalent level reserve mobilization. A interaction observed plasma insulin 0.03) IGF-1 0.04) 19, where AN–RESTR AN–MAINT cows. Diets did not impact > 0.10) BN No effects NEFA, BHB, glucose 0.10). Across nutritional treatment, there positive linear effect (P ≤ 0.04) probability fixed-time transfer. In summary, negative impacts somatotropic axis, independently tissue mobilization, heightened cohorts, which corroborate fertility subspecies.
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ژورنال
عنوان ژورنال: Animal
سال: 2021
ISSN: ['1751-732X', '1751-7311']
DOI: https://doi.org/10.1016/j.animal.2020.100166