A new way to measure milk yield persistency: a genetic point of view with application to Gyr (Bos indicus) cattle
نویسندگان
چکیده
منابع مشابه
Comparison of factor-analytic and reduced rank models for test-day milk yield in Gyr dairy cattle (Bos indicus).
We analyzed 46,161 monthly test-day records of milk production from 7453 first lactations of crossbred dairy Gyr (Bos indicus) x Holstein cows. The following seven models were compared: standard multivariate model (M10), three reduced rank models fitting the first 2, 3, or 4 genetic principal components, and three models considering a 2-, 3-, or 4-factor structure for the genetic covariance mat...
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ژورنال
عنوان ژورنال: Journal of Dairy Research
سال: 2015
ISSN: 0022-0299,1469-7629
DOI: 10.1017/s0022029915000448