Browsing by Author "Salaudeen, Ayo Tawakalt"

With growing consumer interest in the nutritional benefits of high-quality beef, livestock producers face the challenge of enhancing carcass traits, which are typically measurable post-slaughter. As a result, breeding for carcass traits often entails lengthy waiting periods for progeny testing and the need to sacrifice the bull’s progeny for carcass trait assessment. This study aims to estimate the genetic parameters of conformation traits (stature [S], withers width [WW], inner hindquarter [IHQ], hindquarter width [HQW]) and their genetic correlations with carcass traits (carcass weight [CW], carcass conformation [CC], fat class [FC]) using the records of two beef cattle breeds (Charolais: 1,620 and Limousine: 1,326) obtained from the Finnish Animal Breeding Association. A univariate model was used for heritability estimation and a bi-variate model for genetic correlations. The variance and co-variance components were estimated using the restricted maximum likelihood (REML) method in the DMU software. Heritability estimates (±standard error) varied from 0.17±0.04 (FC) to 0.33±0.04 (CC) for Charolais, and from 0.15±0.05 (CW, FC, and WW) to 0.33±0.05 (S) for Limousine. The study found CC to have the highest heritability in both Charolais (0.33±0.04) and Limousine (0.31±0.05) among the carcass traits, indicating a faster response to selection and a higher potential for improvement. Statistically significant correlations were found between conformation and carcass traits, with HQW, IHQ and WW displaying moderate to strong correlations (ranging from 0.32 to 0.79) with CC across both breeds. Additionally, S, HQW and WW exhibited genetic correlations with CW. These results suggest the potential of utilizing these conformation traits as early indicators for the respective carcass traits. These findings offer insights into the potential of using conformation traits as early indicators for selecting animals with desirable carcass traits, thereby guiding breeding decisions towards improved beef quality, as well as promoting resource efficiency.