The Old Folks Home

happy-fathers-day-dancing-b.gif
 
lethal gene?

araucana have one related to tufts.

Abstract
The lethal effects of the ear-tuft trait of the Araucana chicken are reported and the genetic basis of its inheritance is verified. The ear-tuft (Et) gene acts as an autosomal dominant with reduced penetrance in heterozygotes. This study gave two estimates of reduced penetrance, 4 and 14 percent. Homozygotes die during 17–19 days of incubation, although a few may hatch. Most of these die within a week, but occasionally an “escaper” will live to maturity; one such Et/Et individual was verified. Heterozygotes also experience increased embryonic mortality at about 20 or 21 days of incubation. In this study the average embryonic mortality among heterozygotes was 41.6 percent. Posthatch mortality also was significantly greater among tufted chicks than among nontufted chicks.
 
lethal gene?

I think the one being referred to is the creeper gene, which causes extremely short legs in several breeds of chicken, including the Japanese Bantam. Since the Japanese Bantam is an ancestral breed of the Serama, the creeper gene is potentially present in Seramas. Though short legs are considered desirable in the Japanese Bantam, they are considered undesirable in the American Serama, so anyone breeding for type would be weeding out any birds carrying the creeper gene. (One fairly good way to judge is to compare with the wing. Because of the upright posture of the Serama, the wing hangs essentially vertical. When viewed from the side, a Serama with good length of leg will have the feet visible below the wing tips, because the legs are long enough to keep the wings from brushing the ground)
 

New posts New threads Active threads

Back
Top Bottom