HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Shook, G. E. Articles by Bodoh, G. W. Search for Related Content PubMed Articles by Shook, G. E. Articles by Bodoh, G. W.

Within-Sire Relationships of Breeding Fees and Months in Service to Mates' Milk Yield¹

Department of Dairy Science, University of Wisconsin, Madison 53706

ABSTRACT

Three analyses determined whether changes in breeding fee and time were associated with differences in milk yield among cows selected as mates of artificial insemination sires on a within-sire basis. Analysis I, involving 21 bulls mated predominantly at $5 and $6, showed no effect of price when averaged over all bulls, but the price x sire interaction was significant (P<.05). Two of the bulls were mated to significantly higher producing cows at $6 than at $5 whereas the reverse was true for two additional bulls. Analysis II included 23 bulls mated at prices ranging from $5 to $15 and showed that regression of mates' production on breeding fee was significant for six bulls. Regression coefficients varied markedly among the bulls, but, on the average, higher producing mates were chosen with breeding fees of $10 to $13 than at higher or lower prices. The regression of mates' production on months in artificial insemination service (Analysis III) was significant (P < .05) for four of the 37 bulls. On the average, bulls' early mates were higher producers than later mates.

¹ Research supported by the College of Agricultural and Life Sciences, University of Wisconsin, Madison.