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| Titel: |
Genotype by environment interaction for length of productive life in Swedish Red and White dairy cattle |
| Auteur: |
Petersson, Karl-Johan Kolmodin, Rebecka Strandberg, Erling |
| Verschenen in: |
Acta agriculturae Scandinavica. Section A, Animal science |
| Paginering: | Jaargang 55 (2005) nr. 1 pagina's 9-15 |
| Jaar: |
2005-05 |
| Inhoud: |
In this study the amount of genotype by environment interaction (G×E) for length of productive life of Swedish Red and White dairy cattle was studied. The environmental variables used were the herd-year averages of number of first parity cows, peak yield, protein yield, and productive life. Data were analysed using multi-trait models (using low and high quartile herds) and reaction norm models (using the whole continuous scale). Considerable G×E was found for the trait productive life between environments (herds) with short or long average productive life, and a genetic correlation of 0.74 was found. For productive life in relation to herd size, G×E was negligible, and the genetic correlation was 0.95. For productive life in relation to herd-year average of peak yield or protein yield some G×E was indicated by the reaction norm model, especially between extreme environments. The G×E between herds with short or long average productive life should be studied further and might need to be considered in breeding programmes for dairy cattle. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 3 van 6 gevonden artikelen
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