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Article: Comparison of genetic parameter estimates of total sperm cells of boars between random regression and multiple trait animal models.(Report)
- Article from:
- Asian - Australasian Journal of Animal Sciences
- Article date:
- July 1, 2008
- Author:
CopyrightCOPYRIGHT 2008 Asian - Australasian Association of Animal Production Societies. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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ABSTRACT : The objective of this study was to compare random regression model and multiple trait animal model estimates of the (co) variance of total sperm cells over the active lifetime of AI boars. Data were provided by Smithfield Premium Genetics (Rose Hill, NC). Total number of records and animals for the random regression model were 19,629 and 1,736, respectively. Data for multiple trait animal model analyses were edited to include only records produced at 9, 12, 15, 18, 21, 24, and 27 months of age. For the multiple trait method estimates of genetic and residual variance for total sperm cells were heterogeneous among age classifications. When comparing multiple trait ...