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Hereditary persistent right oviduct in the chicken PNP/DO line
M Wakamatsu1, T Yamagata, T Namikawa
1Laboratory of Animal Genetics, Graduate School of Bioagricultural Sciences, Nagoya University, Chikusa, Japan.
Poultry Science
|August 18, 2000
Summary
A genetic mutation in Fayoumi chickens causes a persistent right oviduct in females. This hereditary trait results from slow embryonic regression of the Müllerian duct, influenced by multiple genes.
Area of Science:
- Poultry Genetics
- Developmental Biology
- Reproductive Anatomy
Background:
- A specific inbred line of Fayoumi chickens (PNP/DO line) exhibits a hereditary trait of a persistent right oviduct.
- This condition involves varying lengths of elongated right oviducts in females, alongside the normal left reproductive system.
Purpose of the Study:
- To investigate the form of expression and mode of inheritance of the persistent right oviduct trait in the PNP/DO chicken line.
- To understand the developmental basis of left-right asymmetry in the female genital system within this line.
Main Methods:
- Embryonic observations to determine the developmental origin of the persistent right oviduct.
- Intracrosses and reciprocal crosses between the PNP/DO line and control strains to analyze inheritance patterns.
Main Results:
- Embryonic development shows slow regression of the right Müllerian duct as the cause.
- Intracrosses yielded 93% of female embryos with persistent right Müllerian ducts.
- Reciprocal crosses resulted in 5% (F1) and 30% (N2) of female embryos exhibiting the trait.
Conclusions:
- The persistent right oviduct trait in PNP/DO chickens is intrinsic left-right asymmetry.
- Inheritance is suggested to be controlled by two pairs of autosomal recessive genes with major effects, interacting with background genotype and minor effect loci.