Red factor

Red factor is a genetic trait related to red coat colour in cattle. The main gene that regulates the switch between synthesis of black (eumelanin) or red-brown pigment (pheomelanin) is MC1R (melanocyte-stimulating hormone receptor). Red factor is inherited as an autosomal recessive trait therefore only homozygous animals (ee) express red coat colour.

In our laboratory we currently offer the red factor test that detects 4 different mutations in MC1R gene. The test detects alleles ED, E+, e, ev1 and ev2. ED allele is dominant over other alleles. All animals with ED are black. When there are no mutations on alleles ED, e, ev1 and ev2 animal’s genotype is E+ and can be black or red. Animals with red coat colour are homozygous for alleles e, ev1 and ev2. The test does not detect further possible mutations, which can also cause red coat colour in some animals.

Mutation: MC1R gene

DNA test sample: EDTA whole blood (1.0 ml), buccal swabs, hair, semen.


29.00 €

  • You can order free sampling kit.
  • Only one sample is required for each animal, even if you order several tests.
  • Samples are stored for the option to order additional tests.
  • We offer expert assistance in interpreting the results.
Suitable for breeds
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