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[Case report--polydactyly in a German holstein calf].

C Bähr1, K Wittenberg, O Distl

  • 1Institut für Tierzucht und Vererbungsforschung, Tierärztlichen Hochschule Hannover. ottmar.distl@tiho-hannover.de

DTW. Deutsche Tierarztliche Wochenschrift
|October 11, 2003
PubMed
Summary

Polydactyly, a limb malformation, was observed in a German Holstein calf. Genetic factors, possibly inherited, are suspected due to common ancestors and inbreeding.

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Area of Science:

  • Veterinary Genetics
  • Animal Science
  • Congenital Malformations

Background:

  • Polydactyly is a congenital anomaly characterized by supernumerary digits.
  • Genetic inheritance patterns are often investigated for congenital limb malformations in livestock.

Observation:

  • A female German Holstein twin calf presented with polydactyly affecting both forelimbs and one hindlimb.
  • The malformation involved an extra medial toe in three affected limbs.
  • No limb abnormalities were noted in the male twin or four maternal half-siblings.

Findings:

  • Pedigree analysis indicated common ancestry among affected individuals.
  • The inbreeding coefficient of the affected calf was calculated at 1.312%.
  • The observed polydactyly is likely attributable to a genetic background, potentially monogenic or digenic inheritance.

Implications:

  • This case highlights the potential for inherited polydactyly in German Holstein cattle.
  • Further genetic studies are warranted to elucidate the specific mode of inheritance.
  • Understanding the genetic basis can aid in breeding programs to reduce the incidence of limb malformations.

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