dc.creator | Valera Córdoba, María Mercedes | es |
dc.creator | Blesa, F. | es |
dc.creator | Santos, R. Dos | es |
dc.creator | Molina, Antonio | es |
dc.date.accessioned | 2018-03-22T12:40:11Z | |
dc.date.available | 2018-03-22T12:40:11Z | |
dc.date.issued | 2006 | |
dc.identifier.citation | Valera Córdoba, M.M., Blesa, F., Santos, R.D. y Molina, A. (2006). Genetic study of gestation length in andalusian and arabian mares. Animal Reproduction Science, 2006 (95), 75-96. | |
dc.identifier.issn | 1873-2232 | es |
dc.identifier.uri | https://hdl.handle.net/11441/71247 | |
dc.description.abstract | The length of gestation in Andalusian, or Spanish Purebred (SPB) and Arabian (AB) mares reared in Spain
was analysed, based on 766 spontaneous full-term deliveries appertaining to 141 mares of SPB breed and 72
mares of AB breed in 31 breeding seasons. The data were obtained from the Yeguada Militar de Jerez de la
Frontera stud farm in Cadiz, Spain. The mean length of gestation was of 336.8 ´ ± 0.48 days in the SPB mares
and 340.3 ± 0.63 days in AB mares. To assess the accurate prediction of time of birth the potential effect of
a number of factors was investigated. The influences of the breed, mare, month and year of mating, age of
the mother, number of births and sex of the foal were statistically significant. The factor have the greatest
influence over the gestation length was the mare itself, with a correlation among consecutive births of around
0.4. The effect of inbreeding, both of the mare and foal, was negligible. Gestation length shortened as the
breeding season progressed: in both breeds, a delay of 1 month in mating corresponded to a decrease of 3
days in the gestation length. According to our results, gestation length decrease as the mare gets older, with
the shortest gestation periods when the mare is 10–12 years old, and from this point on, it slowly increases.
The gestation period shortens as the 4th or 5th birth approaches, and then gets progressively longer. The
range of variation in gestation length due to the number of births to the mare is of 2.9 days for the AB mares,
and 2.2 days for SPB mares. The heritability for the gestation length for AB and the SPB breeds was 0.2, with
a repeatability of 0.36 and 0.37, for SPB and AB breeds, respectively. With the data from both breeds, and
using a classical approach, the response to selection was estimated if mares with extreme gestation lengths
were culled, i.e. lengths which are under 310 days, or over 360 days. According to our results, in the case of SPB, a decrease of 14–45% would occur in the number of extreme gestation lengths, while in the AB breed,
this value would decrease from 2 to 39%. | es |
dc.format | application/pdf | es |
dc.language.iso | eng | es |
dc.publisher | Elsevier | es |
dc.relation.ispartof | Animal Reproduction Science, 2006 (95), 75-96. | |
dc.rights | Attribution-NonCommercial-NoDerivatives 4.0 Internacional | * |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/4.0/ | * |
dc.subject | Equine | es |
dc.subject | Heritability | es |
dc.subject | Foaling | es |
dc.subject | Repeatability | es |
dc.title | Genetic study of gestation length in andalusian and arabian mares | es |
dc.type | info:eu-repo/semantics/article | es |
dcterms.identifier | https://ror.org/03yxnpp24 | |
dc.type.version | info:eu-repo/semantics/publishedVersion | es |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | es |
dc.contributor.affiliation | Universidad de Sevilla. Departamento de Ciencias Agroforestales | es |
dc.relation.publisherversion | https://www.sciencedirect.com/science/article/pii/S0378432005002708 | es |
dc.identifier.doi | 10.1016/j.anireprosci.2005.09.008 | es |
dc.contributor.group | Universidad de Sevilla. AGR-233 Tecnología de la Producción Animal | es |
idus.format.extent | 20 p. | es |
idus.validador.nota | en abierto http://www.uco.es/genetica/MERAGEM/archivos/ocio/equinosocio3.pdf | es |
dc.journaltitle | Animal Reproduction Science | es |
dc.publication.volumen | 2006 | es |
dc.publication.issue | 95 | es |
dc.publication.initialPage | 75 | es |
dc.publication.endPage | 96 | es |
dc.identifier.sisius | 9054 | es |