A putative autosomal gene increasing ovulation rate in Romney sheep

Ovulation rates were measured in 547 progeny of 24 rams in a Romney flock with a long history of high prolificacy. These sheep were from the same family line and the distribution of ovulation rates suggests the presence of a segregating major gene ( FecW) that increases prolificacy. The phenotype di...

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Bibliographic Details
Published in:	Animal reproduction science Vol. 92; no. 1; pp. 65 - 73
Main Authors:	Davis, G.H., Farquhar, P.A., O’Connell, A.R., Everett-Hincks, J.M., Wishart, P.J., Galloway, S.M., Dodds, K.G.
Format:	Journal Article
Language:	English
Published:	Netherlands Elsevier B.V 01-03-2006
Subjects:	animal genetics Animals autosomes ewes Female female fertility gene expression homozygosity inheritance (genetics) Litter Size - genetics Litter Size - physiology Major gene major genes Male Ovulation Ovulation - genetics Ovulation - physiology Pedigree phenotype Pregnancy Reproduction reproductive efficiency Romney Sheep Sheep - genetics Sheep - physiology Sheep Reproduction Ovulation Major gene
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Summary:	Ovulation rates were measured in 547 progeny of 24 rams in a Romney flock with a long history of high prolificacy. These sheep were from the same family line and the distribution of ovulation rates suggests the presence of a segregating major gene ( FecW) that increases prolificacy. The phenotype differs from those previously described for major genes affecting prolificacy in sheep. The putative gene shows autosomal inheritance and one copy increases ovulation rate by 0.8–1.0 eggs per ewe ovulating. To date, we have found no evidence of infertility among putative homozygous ewes, as described in some autosomal major genes for prolificacy.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	0378-4320 1873-2232
DOI:	10.1016/j.anireprosci.2005.05.015