The QTL interval mapping analysis in the F3 population revealed eighteen significant QTL for body weight and various carcass composition traits on chromosomes 2, 5 and 11. Some QTL co-localised, suggesting pleiotropic effects for some chromosomal regions. Several QTL were found to be unique to our population, whereas others mapped to already known QTL regions suggesting that the same QTL alleles segregate also in our lines. Results in the F3 cross now direct our analyses to target identified QTL regions using F9 intercross generation.
B.03 Paper at an international scientific conference
COBISS.SI-ID: 2511496We used six microsatellite markers for eleven growth and carcass traits with the aim to confirm these QTL. Markers ROS74, ADL114 and MCW56 confirmed previously coarsely mapped QTL for feet weight in the region between 302 and 358 cM on chromosome 2. Microsatellite marker MCW223 on chromosome 5 showed significant effects for correlated carcass traits. Microsatellite markers LEI110 and ADL210 on chromosome 11 were statistically significant for carcass weight and correlated traits, body weight on day 55 and feet weight in F3 population.
E.01 National awards
COBISS.SI-ID: 1942408The average body weight of chickens at 55 days of age was decreasing from generation to generation, which can be attributed to inbreeding depression. A cumulative % of inbreeding in the last (F9) generation was from 78.0 to 94.2 %. The biggest correlation with the live body weight at slaughter in F9 generation was determined for the whole carcass weight after slaughter (0.98-0.99), and the lowest for the abdominal fat weight (0.53-0.55). Variability of body weight and carcass traits expressed with the coefficient of variation was larger in F7 than in F3 or F4 generation.
COBISS.SI-ID: 2561160