Strain Name:
California Blonde
Stock Number:
Citation ID:
Major Collection:

Gene Information

Genotype Determination
ES Cell Line
California blonde deer mice have diluted tan pelage, unpigmented skin and ears and reduced pigment in the retinal epithelium. The ear and tail stripe pigmentation is dilute tan in contrast to the darker color of the wild-type. The eyes, when examined with bright light, have a distinctly reddish-brown color, in contrast to the intensely dark eyes of the wild-type. Microscopic sections through the optic cup, as observed in neonates reveal a lack of pigment in the pigment layer of the retinal epithelium in the California blonde mutant. The California blonde phenotype is very similar to that of the brown, blonde and golden nugget mutations in Peromyscus. The light tan dorsal coat color of California blonde is due to brown eumelanin granules in the individual hairs replacing the darker, near-black normal pigment granules, as seen upon microscopic examination of individual hairs. This condition is shared with other other blonde and brown-like mutants. The granules in the California blonde hairs are somewhat darker than those of blonde, but lighter than those of brown and golden nugget. In California blonde and blonde the base of the hair is a pale grayish, whereas in brown and golden nugget the base is very pale tan and in platinum the hair bases are virtually unpigmented.
MeSH Terms
    Strain Development
    Source: In 1981 a tan-colored male deer mouse appeared in a breeding stock of P.m. santacruzae derived from wild ancestors collected on Santa Cruz Island CA, during 1978 and 1979. The trait was designated "California blonde" to distinguish it from the previously named blonde mutant.
    Primary Reference

    For more information, please see California Blonde 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 (cfb/cfb) coat color is a diluted tan pelage

    Heterozygous (cfb/+) are the same a wild-type.

    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.