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MacNeil,Michael D.. |
ABSTRACT The objective of this research was to discern the contribution of genomic information to multiple-trait breeding objectives and thus understand the economic value of that information. True genetic values were simulated for each of n, possibly correlated, traits. These true genetic values, combined with uncorrelated random noise, resulted in both genomic and phenotypic estimated breeding values, EBVg and EBVp, respectively. The separate EBV were then merged (blended) as a function of their respective accuracies to produce a unified EBV for each of the n traits. Finally, for each simulated animal (N = 10000), the sum of products of economic weights and EBV was calculated to predict the economic value (net merit) of the individual. Accuracies of the... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Animal breeding; Assisted selection; Genetic gain; Production system. |
Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982016001200794 |
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Cardoso,Leandro Lunardini; Tarouco,Jaime Urdapilleta; MacNeil,Michael D.; Lobato,José Fernando Piva; Dambrós,Mara Célia; Freitas,Aline Kellermann de; Devincenzi,Thais; Feijó,Fernanda Dorneles; Cardoso,Fernando Flores. |
ABSTRACT Two hundred seventeen grass-finished Braford steers were assessed by ultrasonic scanning and subsequently harvested with their pistol hindquarters fabricated into boneless wholesale cuts. The Longissimus thoracis muscle area and subcutaneous fat depths were measured. The objectives of this study were: 1) to develop prediction equations for weights of the pistol hindquarter and high-value commercial cuts, and 2) to estimate sample size needed for experiments comparing pistol hindquarter retail product weight using either physically or ultrasonically measured carcass traits. Carcass measurements explained 44 % to 94 % of the variation in weights of individual cuts, whereas, measurements that were made using ultrasound explained 42 % to 90 % of the... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cattle; Carcass; Models; Ultrasound. |
Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162020000400401 |
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