Mutation in bone morphogenetic protein receptor-IB is associated with increased ovulation rate in Booroola Mérino ewes | Zendy

Philippe Mulsant | Zendy; Frédéric Lecerf | Zendy; Stéphane Fabre | Zendy; Laurent Schibler | Zendy; Philippe Monget | Zendy; Isabelle Lanneluc | Zendy; Claudine Pisselet | Zendy; Juliette Riquet | Zendy; Danielle Monniaux | Zendy; Isabelle Callebaut | Zendy; Edmond Cribiu | Zendy; Jacques Thimonier | Zendy; Jacques Teyssier | Zendy; Loýs Bodin | Zendy; Yves Cognié | Zendy; Nour Chitour | Zendy; Jean-Michel Elsen | Zendy

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Mutation in bone morphogenetic protein receptor-IB is associated with increased ovulation rate in Booroola Mérino ewes

Author(s) -

Philippe Mulsant,

Frédéric Lecerf,

Stéphane Fabre,

Laurent Schibler,

Philippe Monget,

Isabelle Lanneluc,

Claudine Pisselet,

Juliette Riquet,

Danielle Monniaux,

Isabelle Callebaut,

Edmond Cribiu,

Jacques Thimonier,

Jacques Teyssier,

Loýs Bodin,

Yves Cognié,

Nour Chitour,

Jean-Michel Elsen

Publication year - 2001

Publication title -

proceedings of the national academy of sciences

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 5.011

H-Index - 771

eISSN - 1091-6490

pISSN - 0027-8424

DOI - 10.1073/pnas.091577598

Subject(s) - biology , endocrinology , ovulation , bone morphogenetic protein 15 , medicine , locus (genetics) , receptor , gene , genetics , bone morphogenetic protein , hormone , bone morphogenetic protein 7

Ewes from the Booroola strain of Australian Mérino sheep are characterized by high ovulation rate and litter size. This phenotype is due to the action of the FecB(B) allele of a major gene named FecB, as determined by statistical analysis of phenotypic data. By genetic analysis of 31 informative half-sib families from heterozygous sires, we showed that the FecB locus is situated in the region of ovine chromosome 6 corresponding to the human chromosome 4q22-23 that contains the bone morphogenetic protein receptor IB (BMPR-IB) gene encoding a member of the transforming growth factor-beta (TGF-beta) receptor family. A nonconservative substitution (Q249R) in the BMPR-IB coding sequence was found to be associated fully with the hyperprolificacy phenotype of Booroola ewes. In vitro, ovarian granulosa cells from FecB(B)/FecB(B) ewes were less responsive than granulosa cells from FecB(+)/FecB(+) ewes to the inhibitory effect on steroidogenesis of GDF-5 and BMP-4, natural ligands of BMPR-IB. It is suggested that in FecB(B)/FecB(B) ewes, BMPR-IB would be inactivated partially, leading to an advanced differentiation of granulosa cells and an advanced maturation of ovulatory follicles.

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