Relationships Between Net Income, Days of Productive Life, Production, and Linear Type Traits in Grade and Registered Holsteins

Relationships between production, linear type traits, relative net income (with opportunity for calving through 60 mo of age), relative net income adjusted for opportunity cost, and days of productive life were examined in Holsteins. Records were available for 7479 grade and 64,245 registered cows....

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Bibliographic Details
Published in:Journal of dairy science 1992-12, Vol.75 (12), p.3553-3561
Main Authors: de Haan, M.H.A., Cassell, B.G., Pearson, R.E., Smith, B.B.
Format: Article
Language:English
Subjects:
APTITUD LECHERA
APTITUDE LAITIERE
Biological and medical sciences
CONFORMATION ANIMALE
COSTOS DE OPORTUNIDAD
COUT D'OPPORTUNITE
FENOTIPOS
Food industries
Fundamental and applied biological sciences. Psychology
income
longevity
Milk and cheese industries. Ice creams
MODELE MATHEMATIQUE
MODELOS MATEMATICOS
MORFOLOGIA ANIMAL
NUMERO DE LACTACION
NUMERO DE LACTATION
PHENOTYPE
POSSIBILITE DE PRODUCTION
PRODUCCION LECHERA
PRODUCCION POTENCIAL
production
PRODUCTION LAITIERE
RENTA
REVENU
type traits
VACAS LECHERAS
VACHE LAITIERE
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Summary:Relationships between production, linear type traits, relative net income (with opportunity for calving through 60 mo of age), relative net income adjusted for opportunity cost, and days of productive life were examined in Holsteins. Records were available for 7479 grade and 64,245 registered cows. Correlations between relative net income adjusted for opportunity cost and first lactation product value were .55 and .59 for grade or registered cows, .21 and .23 between relative net income adjusted for opportunity cost and dairy form, and .16 and .20 between relative net income adjusted for opportunity cost and final score. Partial correlations (adjusted for first lactation product value) were lower than simple correlations for dairy form and final score but were higher for fore udder attachment and udder depth in both grade and registered cows. Prediction of relative net income, relative net income adjusted for opportunity cost, and days of productive life with first lactation product value and an additional type trait showed very little increase in R2 over use of first lactation product value alone. The increase in R2 was greater for days of productive life than for the two net income functions. The most profitable cows were high producers. Physical characteristics of the cow did not enable prediction of lifetime profit with appreciably greater accuracy than production alone.
ISSN:0022-0302
1525-3198
DOI:10.3168/jds.S0022-0302(92)78131-4