Chickens of a commercial pure White Leghorn line were typed for B-F an
d B-G by serological, biochemical and molecular biological methods. Am
ongst 287 typed animals of one particular line, three animals with rec
ombinant haplotypes were identified. Compared to earlier reports this
revealed a statistically significant (P < 0.05), tenfold higher recomb
ination frequency in this chicken line.