Linked Life Data

3667461

Source:http://linkedlifedata.com/resource/pubmed/id/3667461

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
4
pubmed:dateCreated
1987-12-8
pubmed:abstractText
As part of a divergent selection experiment (high vs low feed conversion) designed to obtain realized genetic parameter estimates for postweaning feed conversion, 35 Angus bull calves were selected each year from 1979 through 1983 to be fed in a 140-d postweaning performance test. From these 35 individually-fed bulls, the three most efficient and three least efficient (in terms of kilograms of total digestible nutrients required per kilogram of gain) were selected each year to each be mated to approximately 20 purebred Angus cows in a test herd. In the last 2 yr of the experiment, feed:gain ratios were adjusted for differences in maintenance requirements before selection. An alternative to selection based on feed/gain or adjusted feed/gain would have been to select on an index of feed intake and gain (Index3 = -1.0 feed intake + 3.87 gain) where feed intake was either unadjusted or adjusted (AdjIndex3) for differences in maintenance requirements. Residual correlations (year effects removed) among the four selection critera were large ([r[ greater than or equal to .76; P less than .01) as were correlations among ranks of the bulls based on the four selection criteria ([r[ greater than or equal to .75). Predicted genetic change for fee:gain ratio in both the high and low directions was greatest when selection was based on feed:gain ratio or Index3. Genetic changes expected to result from selection for feed:gain ratio or Index3 were similar, as were genetic changes expected due to selection for adjusted feed:gain ratio or AdjIndex3.(ABSTRACT TRUNCATED AT 250 WORDS)
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:status
MEDLINE
pubmed:month
Oct
pubmed:issn
0021-8812
pubmed:author
pubmed:issnType
Print
pubmed:volume
65
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
886-95
pubmed:dateRevised
2009-11-19
pubmed:meshHeading
pubmed:year
1987
pubmed:articleTitle
Divergent selection for postweaning feed conversion in beef cattle: predicted response based on an index of feed intake and gain vs fee: gain ratio.
pubmed:affiliation
Anim. Sci. Dept., Ohio State Univ., Columbus 43210.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, Non-P.H.S., Research Support, Non-U.S. Gov't