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Differences in sire evaluations from first and later lactations by breed



Differences in sire evaluations from first and later lactations by breed



Journal of Dairy Science 67(Suppl. 1): 179-180



For 767 Ayrshire, 3175 Guernsey, 29 498 Holstein-Friesian (HF), 3530 Jersey and 984 American Brown Swiss sires with Jan. 1984 evaluations, av. differences between evaluations based on 1st and on later lactations of daughters were 36, 0, -6, 35 and 35 kg with s.d. 114, 94, 142, 91 and 134 kg resp.

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Accession: 001336057

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