Animal Breeding

8 important questions on Animal Breeding

4 balanced breedings over time

  • 80s - mainly milk production (INET) (100%)
  • 1999 DPS: INET (58%) and Durability (42%)
  • 2007 NVI: INET (40%) and Functional traits (60%)
  • 2012 NVI: INET (27%) and Functional traits (73%)

What are 3 future breeding goal traits?

Environmental impact
  • feed efficiency
  • metrage emission
  • phosphorus efficiency
  • Nitrogen efficiency

Health
  • Disease resistance
  • longevity
Product quality
  • Manufacturing
  • nutritious value

Milk Composition - traits that are being recorded routinely

  • Fat%
  • Protein%
  • Somatic Cell Count (SCC)
  • Lactose%
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Detailed milk fat composition. How many are measured? How many are identified?

  • > 100 fatty acids measured
  • 45 fatty acids identified = >95%
  • 13 fatty acids >1% w/w

What causes variation in milk fat composition?


(H^2 = het percentage dat verklaard wordt door genetic differences)
Korte zijn genetisch

Lage zijn environment

What kind of minerals are present in milk?

  • Ca
  • Se
  • K
  • Mg
  • P
  • Zn

What is the variation in minerals in milk per cow?

Afbeelding

What causes variation in mineral composition?

Groen is genetic

oranje/ rest environment

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