- Thread starter
- #21
Pea comb is one of those genes that can be beneficial in some cases, but in others is undesirable. I wanted rose comb blue egg laying Silver Laced Wyandottes. To get that combination, I had to have the gene for straight comb on chromosome 1. The gene combination of straight comb on chromosome 1 plus the rose comb inversion on chromosome 7 is what produces rose comb phenotype.
Pea comb is a variant of the single comb gene on chromosome 1. It is approximately 80 centimorgans (not yet proven) from the oocyanin gene that produces blue eggs. At that distance, approximately 1 in 1000 chicks would get a crossover which would re-link oocyanin from pea comb to single comb.
Cream Legbars are one breed in which the pea comb linkage has been broken. There is a line of whiting blues that have straight comb. Silverudd blues have straight comb. The blue egg laying brown leghorns developed at UARK have straight combs. To the best of my knowledge, these are the only currently available blue egg layers that have straight comb.
Pea comb is a variant of the single comb gene on chromosome 1. It is approximately 80 centimorgans (not yet proven) from the oocyanin gene that produces blue eggs. At that distance, approximately 1 in 1000 chicks would get a crossover which would re-link oocyanin from pea comb to single comb.
Cream Legbars are one breed in which the pea comb linkage has been broken. There is a line of whiting blues that have straight comb. Silverudd blues have straight comb. The blue egg laying brown leghorns developed at UARK have straight combs. To the best of my knowledge, these are the only currently available blue egg layers that have straight comb.