Growth and feed efficiency traits in broilers were analysed to detect QTLs. Data was from 10 families of a cross between two broiler lines in a three generation design. The first two generations consisted of full sib animals, which were genotyped. The third generation consisted of half sibs, which were used to obtain observations. These observations were used to calculate trait values for animals in the second generation. Difference in variance of observations on both sexes was taken into account by standardising. A whole genome scan was performed using a linkage map consisting of 368 microsatellite markers on 24 autosomal linkage groups. QTL detection was done with an across family weighted regression interval mapping approach. The most likely position for a QTL affecting feed consumption and body weight at 48 days was found on chromosome I at 234-240 cM. A permutation test indicated a genomewise significance level of this QTL for feed consumption of 4%.
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., , 310–313, 1998
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