Fig. 1.

QTL confidence interval for meta QTL analysis on chicken chromosome GGA9, GGA14 and GGA18. LPS - indicates QTL associated with lipopolysaccharide natural antibodies; LTA – indicates lipoteichoic acid antibodies; KLH – indicates primary antibody response toward keyhole lymphet heamocyanin. Solid bar presents the length of each chromosome. Dotted line shows confidence interval of the original QTL located on this chromosome in one of the three reference populations (Green-legged Partridgelike and White Leghorn cross; feather pecking cross; population selected for primary antibody response towards SRBC). Arrow indicates new confidence interval defined in meta QTL analysis