Disorders of Sexual Development in PoultryLambeth L.S. · Smith C.A.
aMurdoch Childrens Research Institute, Royal Children's Hospital, and bDepartment of Zoology, University of Melbourne, Melbourne, Vic., and cPoultry Cooperative Research Centre, Armidale, N.S.W., Australia
Sex in birds is determined genetically, as in mammals. However, in birds, female is the heterogametic sex (ZW), while the male is homogametic (ZZ). Although the exact mechanism of avian sex determination is still unclear, genes on one or both of the sex chromosomes must control sexual differentiation of the embryonic gonads into testes or ovaries, and eventually all other sexually dimorphic features. In this review of disorders of sexual development in poultry, we focus upon the gonads and external dimorphisms. Abnormalities of sexual development in poultry can be broadly divided into 2 types: those due to disturbances in sex hormone production by the gonads, and those due to abnormal inheritance of sex chromosomes. Recent studies on gynandromorphic chickens (half male, half female) point to the importance of genetic over hormonal factors in controlling sexual development in fowl.
Craig A. Smith
Murdoch Childrens Research Institute
Royal Children's Hospital, 50 Flemington Road
Melbourne, Parkville, VIC 3052 (Australia)
Tel. +613 8341 6426, E-Mail Craig.Smith@mcri.edu.au
Published online: November 16, 2011
Number of Print Pages : 8
Number of Figures : 4, Number of Tables : 0, Number of References : 40
Sexual Development (Genetics, Molecular Biology, Evolut on, Endocrinology, Embryology, and Pathology of Sex Determination and Differentiation)
Vol. 6, No. 1-3, Year 2012 (Cover Date: February 2012)
Journal Editor: Schmid M. (Würzburg), Scherer G. (Freiburg), Schartl M. (Würzburg)
ISSN: 1661-5425 (Print), eISSN: 1661-5433 (Online)
For additional information: http://www.karger.com/SXD