| Qualifier | mating_type |
| Definition | mating type of the organism from which the sequence was obtained; mating type is used for prokaryotes, and for eukaryotes that undergo meiosis without sexually dimorphic gametes |
| Value Format | "text" |
| Example | /mating_type="MAT-1" /mating_type="plus" /mating_type="-" /mating_type="odd" /mating_type="even" |
| Comment | /mating_type="male" and /mating_type="female" are valid in the prokaryotes, but not in the eukaryotes; for more information, see the entry for /sex. |