Strain Name:
Dominant Spot
Stock Number:
Citation ID:
Other Names:
Whiteface, DSP
Major Collection:

Gene Information

Genotype Determination
ES Cell Line
Deer mice carrying this mutation typically have a white spot on the center of the forehead. The distal portion of the tail is unpigmented, and extensive areas of all-white hair occur on the ventrum. Hairs in the spotted areas lack pigment entirely. This trait is variably expressed and spotting may include the face, neck and chest. White spotting centers on the midline, but asymmetry occurs in many individuals. The dorso-ventral color discontinuity is more irregular than in the wild-type.
MeSH Terms
    Strain Development
    Source: About 1928. Two wild P.m. bairdii trapped from near Morrison IL, showed the trait. Mutant progeny were subsequently maintained at the University of Michigan.
    Primary Reference

    Feldman HW. Piebald Characters of the Deer Mouse. J Hered. 1936;27(8), 301-304.

    For more information, please see Dominant Spot on the Peromyscus Genetic Stock Center website.

    Colony and Husbandry Information

    Colony Surveillance Program and Current Health Reports

    Mice derived from requested cell lines via Microinjection services will be pathogen tested prior to delivery of mice and health reports will be provided. If you require additional health status information prior to requesting microinjection please email
    Coat Color
    Homozygous (S/S) and Heterozygous (S/+): Typically have a white spot on the center of the forehead.

    MMRRC Breeding System
    Not applicable; only cryopreserved sperm is available. The parent colony was sufficiently large to use a random breeding scheme
    Breeding Scheme(s)
    Not applicable; only cryopreserved sperm is available; mice cryorecovered (see below) can be bred Wild-type female x Wild-type male
    Overall Breeding Performance
    Peromyscus mice breed best in a 16:8 light / dark cycle.
    Average litter size
    Recommended wean age
    25 days

    Order Request Information

    Male mice were obtained from the Peromyscus Genetic Stock Center as part of a long term project to develop cropreservation techniques for Peromyscus. Sperm have been cryopreserved and are available. However, cryorecovery techniques have yet to be developed.

    Distribution of this strain requires submission of the MMRRC Conditions of Use (COU). A link to the COU web form will be provided via email after an order has been placed; the form should be completed then or the email forwarded to your institutional official for completion.

    - Products for this strain are Not Yet Available for Ordering
    - If you register interest in this strain, you will be notified when it becomes available for ordering.

    To request material from the MMRRC: Please fill out our on-line request form (accessible from the catalog search results page, or click the Request this Strain button in the fees section). If you have questions or need assistance completing this form, you may call Customer Service at (800) 910-2291 (in USA or Canada) or (530) 757-5710 (international calls). Before you call, please have with you: the MMRRC item number, quantity needed, Bill-to and Ship-to contact information.