An experimental population comprising 30 sires families of 40 halfsibs / sire were used for a QTL detection experiment in a composite sheep line of 50percent Romanov (prolific breed) and 50percent Berrichon du Cher (meat breed). Genetic variability of wool traits was evaluated using an animal model. A first set of 7 out of a total of 64 marker genes was tested on wool traits. Marker gene within sire effect were tested. Heritability and genetic correlations between wool traits (WFD: wool fibre diameter; CVFD: wool coefficient of variation of fibre diameter; SL: stapple length) were high: 0.51 to 0.75. Fleece pigmentation score (FPS) had a high heritability (0.72) but was not genetically correlated to other wool traits. A marker located on chromosome 3 had a significant effect on CVFD, SL and FPS within 3, 5 and 4 families respectively, and another located on chromosome 4 had a significant effect on CVFD in 2 families indicating their potential linkage to QTL’s.

Daniel Allain, I. Lantier, Jean-Michel Elsen, D. Francois, J. C Brunel, J. L Weisbecker, L. Schibler, D. Vaiman, E. P Cribiu, A. Gautier, P. Berthon, F. Lantier

Proceedings of the World Congress on Genetics Applied to Livestock Production, Volume 24: Sheep and goats (fibre); sheep and goats (meat and milk); poultry; horses; buffaloes., , 51–54, 1998
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