OMIA:000240-8839 : Crest in Anas platyrhynchos (Mallard)

In other species: domestic goose , rock pigeon , chicken , budgerigar , ringneck dove

Categories: Integument (skin) phene

Mendelian trait/disorder: yes

Considered a defect: yes

Key variant known: yes

Year key variant first reported: 2023

Cross-species summary: Also called feather-crested head.

Molecular basis: Chang et al. (2023) identified a likely causal variant for the crested cushion in Chinese crested ducks in the 5′UTR of TAS2R40 (123272114_c. G78A of TAS2R40).

Associated gene:

Symbol Description Species Chr Location OMIA gene details page Other Links
TAS2R40 Taste Receptor, type 2, member 40 Anas platyrhynchos - no genomic information (-..-) TAS2R40 Ensembl


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 Year Published PubMed ID(s) Acknowledgements
1620 Crest cushion TAS2R40 regulatory Naturally occurring variant 1 published as variant in the 5′UTR of TAS2R40 (123272114_c. G78A) 2023 37652165

Cite this entry

Nicholas, F. W., Tammen, I., & Sydney Informatics Hub. (2023). OMIA:000240-8839: 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.

2023 Chang, G., Yuan, X., Guo, Q., Bai, H., Cao, X., Liu, M., Wang, Z., Li, B., Wang, S., Jiang, Y., Wang, Z., Zhang, Y., Xu, Q., Song, Q., Pan, R., Qiu, L., Gu, T., Wu, X., Bi, Y., Cao, Z., Zhang, Y., Chen, Y., Li, H., Liu, J., Dai, W., Chen, G. :
The first crested duck genome reveals clues to genetic compensation and crest cushion formation. Genomics Proteomics Bioinformatics , 2023. Pubmed reference: 37652165. DOI: 10.1016/j.gpb.2023.08.002.
2001 Bartels, T., Brinkmeier, J., Portmann, S., Baulain, U., Zinke, A., Krautwald-Junghanns, M.E., Boos, A., Wolf, P., Kummerfeld, N. :
Magnetic resonance imaging of intracranial tissue accumulations in domestic ducks (Anas platyrhynchos f. dom.) with feather crests. Vet Radiol Ultrasound 42:254-8, 2001. Pubmed reference: 11405270. DOI: 10.1111/j.1740-8261.2001.tb00936.x.
Bartels, T., Brinkmeier, J., Portmann, S., Krautwald-Junghanns, M.E., Kummerfeld, N., Boos, A. :
Osteological investigations of the incidence of cranial alterations in domestic ducks (Anas platyrhynchos f. dom.) with feather crests. Ann Anat 183:73-80, 2001. Pubmed reference: 11206986. DOI: 10.1016/S0940-9602(01)80017-0.
2000 Bartels, T., Krautwald-Junghanns, M.E., Portmann, S., Brinkmeier, J., Kummerfeld, N., Sohn, H.G., Dorsch, B. :
The use of conventional radiography and computer-assisted tomography as instruments for demonstration of gross pathological lesions in the cranium and cerebrum in the crested breed of the domestic duck (Anas platyrhynchos f.dom.). Avian Pathol 29:101-8, 2000. Pubmed reference: 19184795. DOI: 10.1080/03079450094126.

Edit History

  • Created by Imke Tammen2 on 04 Sep 2023