Welcome to OMIA


Online Mendelian Inheritance in Animals (OMIA) is a catalogue/compendium of inherited disorders, other (single-locus) traits, and associated genes and variants in 478 animal species (other than human and mouse and rats and zebrafish, which have their own resources) co-authored by Professor Frank Nicholas and Associate Professor Imke Tammen of the University of Sydney, Australia, with help from many people over the years. OMIA information is stored in a database that contains textual information and references, as well as links to relevant PubMed and Gene records at the NCBI, and to OMIM and Ensembl.

OMIA is manually curated by a team of specialists. If you see an error or wish to submit an entry, please contact us.

To join the OMIA Support Group, register at OMIA Support Group.

From 1st September 2011, the OMIA ID is binomial. To better conform to global standards, in March 2023 the binomial format was changed slightly by replacing a space with a colon, i.e. OMIA:xxxxxx-yyyy.., where xxxxxx is the 6-digit number for a trait/disorder, and yyyy.. is the NCBI species taxonomy id (usually four digits, but sometimes longer).

We have recently launched the Pioneers of Mendelian Inheritance in Animals project (PMIA), an exploration of the history of research into Mendelian inheritance in animals.


dog taurine cattle cat pig sheep horse chicken rabbit goat Other TOTAL
TOTAL TRAITS/DISORDERS 904 649 419 374 313 272 254 127 120 1214 4748
Mendelian trait/disorder 415 303 139 137 124 62 138 76 25 385 1873
Mendelian trait/disorder; likely causal variant(s) known 352 209 108 66 61 49 59 17 17 220 1176
Likely causal variants 523 273 185 72 92 109 72 20 30 185 1580
Potential models for human traits 583 332 269 209 136 152 88 75 57 671 2620