Anyone interested in the color Lavender: I continue to learn everyday, so this is what I have learned over the past couple of days: Blue Jersey Giants come in blacks (BB), blues (Bb), and splashes (bb). Most of you already knew that though. What no one has been able to tell me and with much research I have been unable to scientifically explain the variations of other colors such as black sport (white), silver, charcoal, lavender, dark blue, light blue, laced blue, etc.
Finally, I found, with Jen's help, a research paper explaining the lavender gene (for simplicity sake, I will not use quotes, but let it be known that most of what I have written to follow is from the article, not my own works. The article, found at:
http://www.biomedcentral.com/1471-2156/9/7 on the lavender gene will not explain all the various colors outside the traditional black, blue and splash, but it will at least help and assist me in correcting my claim of having lavenders.
According to the article: A single point-mutation within the melanophilin gene causes the lavender plumage colour dilution phenotype in the chicken by Mohsen Vaez, Sarah A. Follett, Bertrand Bedhom, David Gourichon, Michèle Tixier-Boichard, and Terry Burke, January 2008, there are defects of three genes involved in intracellular melanosomal transport, creating diluted pigmentation phenotypes. Comparative sequence analysis of candidate genes in the chicken identified a strong association between a mutation in the MLPH gene and the diluted pigmentation phenotype. Lavender (LAV*L) is an autosomal recessive mutation of the chicken (Gallus gallus) affecting the neural crest derived melanocytes [1]. It causes the dilution of both eumelanin and phaeomelanin to a light grey or buff, respectively. Light and electron microscope studies have revealed that, although lavender melanocytes possess relatively normal dendrite morphology, there is defective peripheral accumulation of melanosomes to the dendrites. This results in the patchy transfer of melanosomes into the keratinocytes of the growing feather. The dilution effect is essentially the result of a mixture of pigmented and unpigmented regions within the feather barbs. Although lavender melanocytes are defective in melanosomal translocation, they show no apparent ultrastructural defect in the microfilament system.
The lavender phenotype. Chickens expressing (a) wild type (LAV*N/LAV*N) is a black looking chicken, and (b) lavender (LAV*L/LAV*L), is a lavender looking chicken. Chickens expressing (a) wild type (LAV*N/LAV*N) and (b) lavender (LAV*L/LAV*L) phenotypes on an extended black (E*E) background looks very much like many of my chickens that I describe as lavender, but are probably not lavenders. I have not had any of my birds tested, but from other avid breeders, my so called lavenders may be overly diluted splashes from breeders breeding too much of splash x splash.
I apologize if in my ignorance, I have mislead anyone.