Multiple-trait restricted maximum likelihood for simulted measures of ovulation rate with underlying multivariate normal distributions
Article Abstract:
A simulation model for the number of ovulations of puberal heifers was constructed from a set of data on the analysis of ovulation rates for eight succesive reproductive cycles of 410 heifers. The simulation model was used to evaluate the heritability and the phenotype and genotype interrelation of the ovulation rate. Both the heritability and genetic correlation of the ovulation rate increase when the underlying normal distribution is multivariate. Selection for a correlated trait will be more effective if the means were estimated from a binomial scale.
Publication Name: Journal of Animal Science
Subject: Zoology and wildlife conservation
ISSN: 0021-8812
Year: 1992
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Estimated breeding values for meat characteristics of crossbred cattle with an animal model
Article Abstract:
Crossbreeds were obtained from five Bos taurus and Bos indicus steers to evaluate breeding values by longissimus muscle area, force measure, sensory panel scores for flavor, juiciness, tenderness and marbling score. A joint estimation of variance components and breeding values for single traits showed the importance of breed effects in ranking breeding value. The need for breeding values across breeds was eliminated since separate evaluations by breed accompanied by selection within breed is already efffective.
Publication Name: Journal of Animal Science
Subject: Zoology and wildlife conservation
ISSN: 0021-8812
Year: 1992
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Relationship between milk expected progeny differences of polled Hereford sires and actual milk production of their crossbred daughters
Article Abstract:
A prediction of milk expected progeny differences (EPD) of Polled Hereford sires was matched against actual milk production of their crossbreed daughters. A correlation value of 0.26 was obtained based on the accuracy of the prediction, heritability of the trait and relationship between sire and daughter. These findings show that actual milk production can be predicted by EPD and can be used in genetic manipulations to improve production.
Publication Name: Journal of Animal Science
Subject: Zoology and wildlife conservation
ISSN: 0021-8812
Year: 1992
User Contributions:
Comment about this article or add new information about this topic:
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