Involvement of the FecXGr mutation in the high prolificacy of the Flemish sheep breed in Belgium - INRAE - Institut national de recherche pour l’agriculture, l’alimentation et l’environnement Access content directly
Conference Poster Year : 2017

Involvement of the FecXGr mutation in the high prolificacy of the Flemish sheep breed in Belgium

Abstract

The Flemish sheep breed is of the dairy type and currently considered as a rare breed in Flanders (Belgium). The original breeding objective of the Flemish sheep was wool production (18th century) but it was also known for its high litter size and good maternal capacity. In order to support conservation efforts, pedigree data (n=5,095) and litter size information (2,385 litters on 1,224 ewes) were analysed. In the period 2010-2015, there were on average 38 sires and 238 ewes used for breeding annually. The average inbreeding coefficient was estimated at 0.055 and the effective population size was 124 (based on increase of coancestry) and 55 (based on increase of inbreeding). Average prolificacy (2002-2015) attained 2.02±0.87 (mean ±stand. deviation) with up to five lambs born. Using a linear animal model and a Gibbs sampling algorithm, a relatively high heritability coefficient of 0.25 was obtained for prolificacy This result warranted a screening of the breed for major fecundity (Fec) genes known to affect litter size. Fifty-eight individuals of the breed (20 rams and 38 ewes) were screened at the 4 Fec gene loci for all known mutations in ovine BMP15, GDF9, BMPR1B and B4GALNT2. Four individuals (3 ewes and 1 ram) were identified as carriers of the FecXGr mutation in the BMP15 gene originally evidenced in the French Grivette breed and no other mutations were detected. This finding warrants: (1) a population wide screening of the breed for this mutation; and (2) an investigation into the effects of the mutation on prolificacy in this breed. This discovery also underlines the importance of conservation and investigation of endangered breeds because they may harbour valuable alleles for future use.
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Dates and versions

hal-02737027 , version 1 (02-06-2020)

Identifiers

  • HAL Id : hal-02737027 , version 1
  • PRODINRA : 400611

Cite

Roel Meyermans, Louise Chantepie, Stéphane Fabre, Florent Woloszyn, Julien Sarry, et al.. Involvement of the FecXGr mutation in the high prolificacy of the Flemish sheep breed in Belgium. 68. Annual Meeting of the European Association of Animal Science (EAAP), Aug 2017, Tallinn, Estonia. Wageningen Academic Publishers, Annual Meeting of the European Association for Animal Production, 23 (1ère Ed.), 513 p., 2017, Book of Abstracts of the 68th Annual Meeting of the Euorpean Federation of Animal Science. ⟨hal-02737027⟩
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