OMIA:002229-9940 : Hypotrichosis, HR-related in Ovis aries (sheep)

In other species: domestic cat , bottlenosed dolphin , beluga whale , minke whale , pig , Indo-Pacific finless porpoise , long-beaked common dolphin , Yangtze River dolphin , Omura's baleen whale

Categories: Integument (skin) phene

Possibly relevant human trait(s) and/or gene(s)s (MIM numbers): 203655 (trait) , 602302 (gene)

Links to MONDO diseases: No links.

Mendelian trait/disorder: yes

Mode of inheritance: Autosomal recessive

Considered a defect: yes

Key variant known: yes

Year key variant first reported: 2003

Cross-species summary: Also known as Hairless

Species-specific name: Absence of all or part of the wool coat

Mapping: Using FISH, Finocchiaro et al. (2008) physically mapped the HR locus in sheep to chromosome OAR2p21-22.

Molecular basis: By cloning and sequencing a very likely comparative candidate gene (based on the homologous human and mouse disorder), Finocchiaro et al. (2003) discovered the likely causal variant to be a nonsense mutation, namely "a C/T transition at position 1312" of the ovine HR gene, giving rise to p.Gln438Ter.

Genetic engineering: Unknown
Have human generated variants been created, e.g. through genetic engineering and gene editing

Breed: Valle del Belice, Italy (Sheep) (VBO_0016156).
Breeds in which the phene has been documented. For breeds in which a likely causal variant has been documented, see the variant table below

Associated gene:

Symbol Description Species Chr Location OMIA gene details page Other Links
HR hair growth associated Ovis aries 2 NC_056055.1 (43475486..43494705) HR Homologene, Ensembl , NCBI gene


By default, variants are sorted chronologically by year of publication, to provide a historical perspective. Readers can re-sort on any column by clicking on the column header. Click it again to sort in a descending order. To create a multiple-field sort, hold down Shift while clicking on the second, third etc relevant column headers.

WARNING! Inclusion of a variant in this table does not automatically mean that it should be used for DNA testing. Anyone contemplating the use of any of these variants for DNA testing should examine critically the relevant evidence (especially in breeds other than the breed in which the variant was first described). If it is decided to proceed, the location and orientation of the variant sequence should be checked very carefully.

Since October 2021, OMIA includes a semiautomated lift-over pipeline to facilitate updates of genomic positions to a recent reference genome position. These changes to genomic positions are not always reflected in the ‘acknowledgements’ or ‘verbal description’ fields in this table.

OMIA Variant ID Breed(s) Variant Phenotype Gene Allele Type of Variant Source of Genetic Variant Reference Sequence Chr. g. or m. c. or n. p. Verbal Description EVA ID Inferred EVA rsID Year Published PubMed ID(s) Acknowledgements
319 Valle del Belice, Italy (Sheep) Hypotrichosis HR nonsense (stop-gain) Naturally occurring variant Oar_rambouillet_v1.0 2 g.45703202C>T c.1312C>T p.(Q438*) Oar_v3.1 position is g.43224867C>T rs423413166 2003 12927087 Variant coordinates obtained from or confirmed by EBI's Some Effect Predictor (VEP) tool. The genomic location on Oar_rambouillet_v1.0 was determined by Katie Eager, EMAI, NSW Department of Primary Industries.

Cite this entry

Nicholas, F. W., Tammen, I., & Sydney Informatics Hub. (2024). OMIA:002229-9940: Online Mendelian Inheritance in Animals (OMIA) [dataset].


Note: the references are listed in reverse chronological order (from the most recent year to the earliest year), and alphabetically by first author within a year.

2008 Finocchiaro, R., Castiglioni, B., Budelli, E., van Kaam, J.B., Portolano, B., Caroli, A., Pagnacco, G. :
Chromosomal assignment of the ovine hairless (hr) gene by fluorescence insitu hybridization. Hereditas 145:258-61, 2008. Pubmed reference: 19076694. DOI: 10.1111/j.1601-5223.2008.02062.x.
2003 Finocchiaro, R., Portolano, B., Damiani, G., Caroli, A., Budelli, E., Bolla, P., Pagnacco, G. :
The hairless (hr) gene is involved in the congenital hypotrichosis of Valle del Belice sheep Genetics Selection Evolution 35:S147-56, 2003. Pubmed reference: 12927087. DOI: 10.1051/gse:2003023.

Edit History

  • Created by Frank Nicholas on 27 Jan 2020
  • Changed by Frank Nicholas on 27 Jan 2020
  • Changed by Imke Tammen2 on 22 Mar 2024