Sunday, January 01, 2012
Inheritance of Color in the Australian Shepherd
"Murphy" A Red Merle Male that upon whelping was thought to have been a Blue Merle but his color changed at 4 Weeks Old
A Field Guide To Coloration of Australian Shepherds
The Australian Shepherd breed shows a unique kaleidoscope of color variety in the coats and eyes. This field guide presents both the common standard colors listed in the ASCA breed standard as well as the common nonstandard colors we see and gives the genetics of each, when known. The Technical section includes a color breeding FAQ, a list of of known loci and their actions, a chart of color nomenclature, and a glossary of genetic terms. The Markings section shows the many interesting markings, modifying genes, patterns of iris pigmentation of the eyes, and some fascinating series of 2 puppies changing colors as they mature, as well as two adults changing color. There is a section on the birth of a pair of identical twin blue merle puppies. There is also a section on visible eye defects. A true self merle is pictured on the red merle page, and some phantom (cryptic) merles have been added. There is also a page showing several dogs that are two colors at once - a somatic mutation. Genetics is a rapidly developing field, and updates will be made as new information and photos become available.