Some secondary (individual feather) patterns show only on females and henny feathered males. It is a difference in the appearance, not the genetic makeup. This is the case with penciling, which is the pattern seen in partridge variety females (and this is one of the three recognised varieties of chantecler--the other two are white and buff).
A partridge male of any breed should not have a penciled or laced breast; it happens, but does not match the standard.
Many breeders of partridge birds maintain two lines, one female and one male; breeding for the best females with a female line, and the best male colouring in the male line. Other breeders use a single line.
A pea comb carrries only the non-rosecomb gene: r+/r+. A cushion comb carries both pea and rose comb genes: P/P R/
Homozygous rose comb birds have lowered fertility, so some breeders deliberately maintain birds het for rose comb or even lacking it entirely.
A partridge male of any breed should not have a penciled or laced breast; it happens, but does not match the standard.
Many breeders of partridge birds maintain two lines, one female and one male; breeding for the best females with a female line, and the best male colouring in the male line. Other breeders use a single line.
A pea comb carrries only the non-rosecomb gene: r+/r+. A cushion comb carries both pea and rose comb genes: P/P R/
Homozygous rose comb birds have lowered fertility, so some breeders deliberately maintain birds het for rose comb or even lacking it entirely.