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Details van artikel 8 van 9 gevonden artikelen
| Titel: |
Genetic Responsiveness of Dairy Cattle to Superovulatory Treatment |
| Auteur: |
Liboriussen, Torkild Makulska, Joanna Callesen, Henrik |
| Verschenen in: |
Acta agriculturae Scandinavica. Section A, Animal science |
| Paginering: | Jaargang 45 (1995) nr. 2 pagina's 99-105 |
| Jaar: |
1995-05-01 |
| Inhoud: |
Response to superovulatory treatment was expressed as number of ova or number of transferable embryos per flush, including or excluding non-responders, and as a categorical trait with only two classes (responders/non-responders). Significant effect of breed was observed for all measures of response, with Red Danish and Danish Red & White having higher values than Danish Jersey and Danish Friesian. Variance/covariance components were estimated for effects of service sire, permanent environment (donor) and additive genotype (donor). Additive genotype did contribute significantly to the phenotypic variance of all quantitative measures of response. Heritabilities of 0.31 ± 0.06 and 0.22 ± 0.07 were found for number of ova and number of transferable embryos, respectively, when non-responders were excluded. If non-responders were included, heritabilities dropped to 0.25 ± 0.06 and 0.15 ± 0.05 for number of ova and number of transferable embryos, respectively. It is argued that systematic use of su-perovulation in cattle breeding programmes might lead to an increase in the frequency of spontaneous multiple births, owing to a genetic change in ovarian sensitivity to gonadotropins. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 8 van 9 gevonden artikelen
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