Brown
Brown, allele symbol eb, is the least dominant of the e-locus alleles, except maybe for a rare mutation called recessive wheaten.
Contents
Revertant of extended black
The Brown mutation has an additional point mutation (amino acid change) compared to the Extended Black mutation, that counteracts a few of it's effects.
Degree of dominance
eb is mostly recessive.
Phenotypic effect
Brown is a black enhanced chicken color.
chick down
Helmet, but other head patterns are possible.
rooster
A black enhanced form of the black breasted (wildtype) phenotype, with only little difference: typically more black markings in hackle and saddle, and mostly dark underfluff.
hen
Resembles the wildtype hen but for the absent salmon breast area, that is stippled instead.
Heterozygosity
Epistatics
Patterns
Brown is suitable for creating some nice chicken patterns, because black pigment is present on the female's breast:
- Double Laced as in Barnevelder
- Single Laced as in Wyandotte
- Concentric Pencilled as in partridge Plymouth Rock
- Spangled ?
Also a good base for columbian with nice contrasting hackle markings. Also less smutty on the body than e+.
- Columbian Wyandotte
- Lakenvelder
Solid black
Needs a few more melanizers than Extended Black or Birchen but would be an excellent base for a yellow legged solid black chicken.
