Effects of herd mean and standard deviation on cow indexes for milk , and adjustments of cow indexes for these effects

Lactation records of cows born since 1964 were used to compute Cow Indexes (CI) for 581,519 Holsteins and 352,758 Jerseys. CI were used to predict Modified Contemporary Deviations (MCD) of daughters at three levels each of herd mean (µ) and standard deviation (σ), and regressions were compared to ex...

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Bibliographic Details
Main Author: Lofgren, Donna Lee
Other Authors: Animal Science (Dairy Genetics)
Format: Others
Language:en_US
Published: Virginia Polytechnic Institute and State University 2017
Subjects:
Online Access:http://hdl.handle.net/10919/74698