Biology:Rumpless chickens
Rumpless chickens are characterised by caudal dysplasia, the absence of the pygostyle or caudal appendage – the "parson's nose". This is the result of inheritance of an autosomal dominant trait. The mutation which causes it is unknown; two candidates have been proposed.[1]:10
History
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Rumplessness in chickens has been documented for centuries. An early description is that of the Bolognese ornithologist Ulisse Aldrovandi in his Ornithologiae Tomus Alter of 1600.[2]:127[3]:318
Rumpless breeds
Rumpless breeds of chicken include: the Araucana or Rumpless Araucana of South America, both large fowl and bantam;[4]:45 the Belgian Barbu de Boitsfort, Barbu de Grubbe and Barbu d'Uccle bantams;[4]:75 the Japanese Uzurao, a rumpless equivalent of the Tosa-Kojidori bantam,[5]:95 and Ingie (large fowl) from Kagoshima Prefecture;[5]:103 the Rumpless Game of the United Kingdom (both large fowl and bantam), sometimes called the Manx Rumpy or Persian Rumpless;[4]:272[6]:65 and the German Ruhlaer Zwerg-Kaulhühner or Rumpless Booted Bantam.[4]:92
References
- ↑ Nowlan H. Freese, Brianna A. Lam, Meg Staton, Allison Scott, Susan C. Chapman (November 2014). A Novel Gain-Of-Function Mutation of the Proneural IRX1 and IRX2 Genes Disrupts Axis Elongation in the Araucana Rumpless Chicken. PLOS ONE. 9 (11): e112364. doi:10.1371/journal.pone.0112364.
- ↑ L.C. Dunn (April 1925). The inheritance of rumplessness in the domestic fowl. Journal of Heredity. 16 (4): 127–134. doi:10.1093/oxfordjournals.jhered.a102573.
- ↑ Ulisse Aldrovandi (1600). Ornithologiae Tomus Alter (in Latin). Bononiae: Apud Io. Bapt. Bellagambam [Giovanni Battista Bellagamba].
- ↑ 4.0 4.1 4.2 4.3 J. Ian H. Allonby, Philippe B. Wilson (editors) (2018). British Poultry Standards: complete specifications and judging points of all standardized breeds and varieties of poultry as compiled by the specialist breed clubs and recognised by the Poultry Club of Great Britain, seventh edition. Chichester; Hoboken, New Jersey: Wiley Blackwell. ISBN 9781119509141.
- ↑ 5.0 5.1 Masaoki Tsudzuki (2003). Japanese native chickens. In: Hsiu-Luan Chang, Yu-chia Huang (editors) (2003). The Relationship between Indigenous Animals and Humans in APEC Region. Taipei: Chinese Society of Animal Science. Pages 91-116.
- ↑ Saleh Shahbazi, Seyed Z. Mirhosseini, Michael N. Romanov (January 2007). Genetic Diversity in Five Iranian Native Chicken Populations Estimated by Microsatellite Markers. Biochemical Genetics. 45: 63–75. doi:10.1007/s10528-006-9058-6.
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