The heritability of milk yield and fat percentage in the Friesian cattle in the province of Friesland
The heritability of milk yield and fat percentage was calculated of herd-registered cattle in Friesland. The estimates were based on daughter-dam comparisons. Comparisons covered the first three lactations. The average heritability estimates of milk yield within sires, and according to the different kinds of soil, were 35.50 and 37.38 %, with daughter-dam regression and dam-daughter correlation, respectively. Under the same conditions the figures for fat percentage were 76.52 and 81.58 %, respectively.When the effect of different soils was ignored, average heritability estimates for milk were... Mehr ...
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| Dokumenttyp: | doctoralThesis |
| Erscheinungsdatum: | 1956 |
| Verlag/Hrsg.: |
Excelsior
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| Schlagwörter: | animal husbandry / animal products / cattle / chemical composition / dairy breeds / friesland / genetic variation / genetics / heritability / ingredients / netherlands / productivity / profitability / raw milk / chemische samenstelling / dierhouderij / dierlijke producten / genetica / genetische variatie / ingrediënten / melkveerassen / nederland / productiviteit / rauwe melk / rentabiliteit / rundvee |
| Sprache: | Englisch |
| Permalink: | https://search.fid-benelux.de/Record/base-29143729 |
| Datenquelle: | BASE; Originalkatalog |
| Powered By: | BASE |
| Link(s) : | https://research.wur.nl/en/publications/the-heritability-of-milk-yield-and-fat-percentage-in-the-friesian |
The heritability of milk yield and fat percentage was calculated of herd-registered cattle in Friesland. The estimates were based on daughter-dam comparisons. Comparisons covered the first three lactations. The average heritability estimates of milk yield within sires, and according to the different kinds of soil, were 35.50 and 37.38 %, with daughter-dam regression and dam-daughter correlation, respectively. Under the same conditions the figures for fat percentage were 76.52 and 81.58 %, respectively.When the effect of different soils was ignored, average heritability estimates for milk were 36.58 and 38.60 %, respectively. The corresponding figures for fat percentage were 76.40 and 81.60 %, respectively.If the figures were not calculated on within-sire basis, the average heritability for milk yield was 39.60 and 40.60 %; whereas for fat percentage the estimates were 84.44 and 83.52 %, as calculated from daughter-dam regression, and damdaughter correlation, respectively.The most reliable estimates of heritability were by the within-sire daughterdam regression calculated for each of the different soil types.