Browsing by Author "Parra-Bracamonte GM"

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    Bivariate analysis to improve genetic evaluations with incomplete databases in Charolais cattle
    (Universidad de Cordoba, 2021-03-17) Herrera-Ojeda J; Parra-Bracamonte GM; Lopez-Villalobos N; Herrera-Camacho J; Orozco-Durán KE
    Objective: Estimate (co)variance components and genetic parameters of live weight traits and examine the effect of selection culling when using bivariate analysis in registered Charolais beef cattle. Materials and methods: The effect of incomplete data over accuracies was compared, expected progeny differences (EPD) and standard errors of prediction (SEP) were obtained and evaluated by comparing univariate and bivariate models for birth (BW), weaning (WW) and yearling (YW) weights. Results: Bivariate models for WW and YW, improved accuracies of EPDs and reduced the SEPs. Joint analysis for BW and WW increased in a 38% the accuracies and reduced SEP estimators for YW (p̌0.001). Accuracies of EPD for BW obtained from univariate models were improved when BW was included in bivariate models. Conclusions: The results support the use of bivariate genetic analysis in limited or incomplete live weight indicators databases that were registered after birth, such as weaning and yearling weight.
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    PERSPECTIVES OF MEXICAN CONSUMER ON BEEF QUALITY
    (Universidad Autónoma de Yucatán, 2021-09-01) Parra-Bracamonte GM; Lopez-Villalobos N; Vázquez-Armijo JF; Magaña-Monforte JG; Martinez-González JC; Moreno-Medina VR
    Background. Eighty percent of beef produced in Mexico is consumed domestically. However, in recent years per capita domestic consumption has gradually decreased. Identifying consumer preferences and their perspectives on beef quality could provide information for the design of programs focused on the improvement of beef production chain and encourage meat consumption. Objective. In this study the definition of quality is provided and discussed and the published evidence on the main attributes considered by the Mexican consumer at the time of beef purchase are revised, providing a critical perspective on beef quality appreciation and to identify some implications and limitations. Methodology. Was performed a bibliographic search of available literature including the Mexican consumer perspective on beef quality attributes published in peer reviewed papers from international and national indexed journals. Main findings. Evidences on the main criterions that Mexican consumer considers as indicators for beef quality during de beef purchase are presented, and some implications and perspectives for the future adoption of more complex systems to guarantee beef quality and add value to the entire production chain are discussed. Implications. This study provide some directions on the establishment of proposals to adequately define the Mexican beef consumer preferences focused on quality and consistency of product, favorable for the whole beef industry. Conclusions: The price of beef was identified as the main criterion considered for Mexican consumer for purchasing of beef, and secondarily, his perspective include intrinsic attributes generically describing the beef quality. More studies are necessary for the identification of factors affecting the beef consistency and to adequately define the most important attributes that satisfy the Mexican consumer perspective on beef quality.