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Selection of dairy cattle for lifetime profit

Selection of dairy cattle for lifetime profit. Objectives. Document USA Net Merit index Discuss traits to include, estimation of economic values Compare current national selection indexes Begin with table from Holstein International (February 1999, p 71). Expression of Economic Indexes.

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Selection of dairy cattle for lifetime profit

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  1. Selection of dairy cattle for lifetime profit

  2. Objectives • Document USA Net Merit index • Discuss traits to include, estimation of economic values • Compare current national selection indexes • Begin with table from Holstein International (February 1999, p 71)

  3. Expression of Economic Indexes • Report proportion of emphasis (relative value / Σ |relative values|) • Reformat into two-way table of traits by countries (Bennet Cassell’s idea) • Also display history of USA indexes (table of traits by years)

  4. Relative emphasis on traits in USDA economic indexes (PD$, MFP$, CY$, and NM$) and Holstein Association TPI across time

  5. Relative emphasis in selection indexes for other countries with many Holsteins

  6. Relative emphasis in selection indexes for other countries with many Holsteins (cont.)

  7. Questions • Do cow shows and judging contests help or harm education? • What is feed cost for protein, fat? • Does milk volume have negative value only because of quotas? • Milk volume quotas in Europe? • People quotas in Australia, NZ?

  8. Prices of Milk and Water • Cost to USA consumers ($ / liter) • American bottled water 0.16 • Canadian spring water 0.51 • Skim milk 0.66 • 2% milk 0.68 • 3.5% (whole) milk 0.72 • French Alps water 1.35 • Milk requires water, cheese does not

  9. Conclusions • Many traits in addition to yield contribute to dairy cattle profit • Longevity, fertility, and health traits have high value • Direction unclear for some traits • Indexes have improved rapidly in recent years

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