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Published byAarno Väänänen Modified over 6 years ago
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Across-country test-day model evaluations for Holstein, Nordic Red Cattle, and Jersey
Martin H. Lidauer, Jukka Pösö, Jørn Pedersen, Jan Lassen, Per Madsen, Esa A. Mäntysaari, Ulrik S. Nielsen, Jan-Åke Eriksson, Kjell Johansson, Timo Pitkänen, Ismo Strandén, Gert P. Aamand Journal of Dairy Science Volume 98, Issue 2, Pages (February 2015) DOI: /jds Copyright © 2015 American Dairy Science Association Terms and Conditions
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Figure 1 Calving age effect by breed on second lactation test-day milk yield in synthetic Danish Red Cattle. Synthetic Danish Red=a cow with a breed composition of 65% Nordic Red Cattle, 14% Brown Swiss, and 21% Holstein. Journal of Dairy Science , DOI: ( /jds ) Copyright © 2015 American Dairy Science Association Terms and Conditions
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Figure 2 Average protein yield index for Holstein cows by year of birth. One index point equals 7.9% of the genetic standard deviation. Journal of Dairy Science , DOI: ( /jds ) Copyright © 2015 American Dairy Science Association Terms and Conditions
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Figure 3 Average protein yield index for Nordic Red Cattle cows by year of birth. One index point equals 7.9% of the genetic standard deviation. Journal of Dairy Science , DOI: ( /jds ) Copyright © 2015 American Dairy Science Association Terms and Conditions
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Figure 4 Average protein yield index for Jersey cows by year of birth. One index point equals 6.8% of the genetic standard deviation. Journal of Dairy Science , DOI: ( /jds ) Copyright © 2015 American Dairy Science Association Terms and Conditions
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