Back-drawer: a behavioral mutant in Japanese quail.
The behavioral mutant "back-drawer" of Japanese quail is characterized by crouching and back-drawing action with the neck bending ventrally and occasional forward rolling. The abnormal behavior appears from hatching to 8 weeks of age. Back-drawers were classified into three types: (1) those showing the abnormality at hatching and dies within 5 days; (2) those showing the abnormality after 2 weeks of age and dies shortly thereafter; and (3) long survivors suffering from abnormal behavior, and showing gradual recovery. Back-drawer males are infertile when showing the abnormality, but can produce progeny after recovery. In contrast, the females tend to have a short life span and lack reproductive ability. Genetic analyses have indicated that this mutant character is controlled by 2 pairs of autosomal recessive genes.
Tsudzuki
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M
Laboratory of Animal Genetics, School of Agriculture, Nagoya University, Japan.
Wakasugi
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N
D000818:Animals; D001522:Behavior, Animal; D003370:Coturnix / Q000235:genetics*; D005260:Female; D005808:Genes, Recessive; D005824:Genetics, Behavioral; D007246:Infertility / Q000235:genetics; D008297:Male; D009154:Mutation; D010641:Phenotype; D011784:Quail / Q000235:genetics*