| Autor: |
Somes RG Jr; Department of Nutritional Sciences, University of Connecticut, Storrs 06269-4017. |
| Jazyk: |
angličtina |
| Zdroj: |
The Journal of heredity [J Hered] 1991 Mar-Apr; Vol. 82 (2), pp. 172-4. |
| DOI: |
10.1093/oxfordjournals.jhered.a111055 |
| Abstrakt: |
Wide high cavernous nostrils are characteristic of all chicken breeds of the V-shaped duplex comb type, whereas all other breeds have slit-type nostrils, including the Sicilian Buttercup breed that has the buttercup-type duplex comb. Crosses between the Sicilian Buttercup and La Flèche breeds and single comb breeds suggest that this trait is a pleiotropic effect of the Dv allele at the duplex locus and is inherited as a recessive when crosses are made to the wild type (d+). The buttercup allele (Dc) at this same locus does not influence nostril morphology by itself, but, when combined with the V-shape comb allele (Dv/Dc), it does allow a single Dv allele to produce mutant nostrils. In this case the inheritance appears dominant. It is proposed that cavernous nostrils are a pleiotropic effect of the comb-size-reducing ability of the Dv allele rather than its duplexing ability. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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