| Primary Identifier | MGI:3654131 | Allele Type | QTL |
| Gene | Smtw1 | Inheritance Mode | Other (see notes) |
| Strain of Origin | Smt | Is Recombinase | false |
| Is Wild Type | false |
| description | Smtw1 is consistent with a recessive or additive mode of inheritance. |
| molecularNote | This allele confers reduced testis weight compared to M. m. molossinus. |