Influence of the FecXR Allele in Heterozygous Ewes on Follicular Population and Outcomes of IVP and ET using LOPU-Derived Oocytes

Contents Ewes heterozygous for the FecXR allele (R+) in the bone morphogenetic protein 15 (BMP15) gene display increased ovulation rate and prolificacy. Besides this phenotypic advantage, the influence of the FecXR allele on follicle number and size, oocyte competence and in vitro production (IVP) r...

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Bibliographic Details
Published in:Reproduction in domestic animals 2013-10, Vol.48 (5), p.717-723
Main Authors: Lahoz, B, Alabart, JL, Folch, J, Sánchez, P, Echegoyen, E, Cocero, MJ
Format: Article
Language:English
Subjects:
Animal reproduction
Embryos
Proteins
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Summary:Contents Ewes heterozygous for the FecXR allele (R+) in the bone morphogenetic protein 15 (BMP15) gene display increased ovulation rate and prolificacy. Besides this phenotypic advantage, the influence of the FecXR allele on follicle number and size, oocyte competence and in vitro production (IVP) remains undefined. With these aims, 8 R+ and 8 wild‐type (++) ewes were subjected to 2 laparoscopic ovum pick‐up (LOPU) trials (four sessions per trial; two with and two without FSH) and subsequent IVP and fresh embryo transfer. All follicles >3 mm were punctured (n = 1673). Genotype did not significantly affect the number of punctured follicles per ewe and session (10.4 and 10.2 in R+ and ++ untreated ewes, 17.4 and 14.3 in R+ and ++ FSH‐treated ewes, respectively), but follicular diameter of R+ ewes was significantly reduced compared with ++ ewes (−0.2 mm in untreated and −0.8 mm in FSH‐treated ewes; p 
ISSN:0936-6768
1439-0531
DOI:10.1111/rda.12150