rumpless

Rumpless is a term used for the mutation which causes the tail of an animal to be absent. Usage and examples can be found in Manx cats, Manx Rumpy, Belgian d'Everberg and Araucana chickens.

The Rumpless Ones
Rumplessness of chicken embryos produced by the injection of insulin and other chemicals
The embryogeny of a recessive rumpless condition of chickens
Detection and Genetic Study of Rumpless Trait in Piao Chicken
The genetics of the rumpless fowl with evidence of a case of changing dominance
LINKAGE TESTS IN POULTRY: II.—Linkage of the Rumpless Gene
Research Progress on Molecular Mechanisms of Rumpless Trait in Chicken
Secret of Lower Viability in Rumpless Chicken –Lack of Burse of Fabricius, Observed in a Chinese Rumpless Chicken (Piao Chicken)
Genome-Wide Association Mapping and Identification of Candidate Genes for the Rumpless and Ear-tufted Traits of the Araucana Chicken
A Novel Gain-Of-Function Mutation of the Proneural IRX1 and IRX2 Genes Disrupts Axis Elongation in the Araucana Rumpless Chicken