Allele Symbol: Ay
Name: agouti yellow
Alteration at locus: Spontaneous Mutation
Gene Symbol: a
Alteration at locus: Spontaneous Mutation
ES Cell Line: R1
The agouti yellow gene is homozygous lethal. Therefore
nonagouti is also segregating. As is true of all DBA mice,
these are also mutant at the dilute (Myo5a) and brown
(Tyrp1) loci. For this reason, the homozygous nonagouti
littermates are dilute brown in phenotype and the heterozygous mice
are dilute yellow in phenotype.
The full genotype of yellow mice is
the control littermates are
Mice heterozygous for the mutant allele have a dilute yellow coat, are obese, but not as obese as C57BL/6J-Ay mice. Yellow is dominant to nonagouti and epistatic to brown. It has not been determined if the yellow mice are prone to diabetes on the DBA background, as are the C57BL/6J-Ay mice.
Strain of Origin: old mutant of the mouse fancy
Strain genetic background: DBA/2J
Strain Development: This strain was created by backcrossing the spontaneous mutation from C57BL/6J-Ay/a, that was obtained from JAX, onto DBA/2J.
Suggested Control Mice:
Donor: Dr. M. L. Lamoreux, Texas A&M University
Do not feed high fat diet due to obesity and diabetic tendencies. Pups are small and should not be weaned until at least 4-5 weeks of age (the donating investigator routinely waits to wean these mice until they are 8-10 weeks of age). Males seem to mature slowly and don't breed well until they are 3 months of age.
Coat color: Dilute yellow
MMRRC Breeding System: Backcross
Overall Breeding Performance: Poor. It is usually very much easier to obtain viable litters if yellow males are mated with nonyellow females, and if the mice are maintained in more than usually crowded conditions. Trying to mate these as pairs probably would not work. Some of the yellow females never breed. So in rederivation, it will be necessary to provide more than three animals per client.
|Viability and Fertility:||Female||Male||Comments|
|Homozygotes are viable:||No||No|
|Homozygotes are fertile:||No||No|
|Heterozygotes are fertile:||Yes||Yes|
|Age Reproductive Decline:||6 months||6 months|
Average litter size: 6
Recommended wean age: 5 weeks
Limited quantities of breeder mice (recovered litter) are available from a cryoarchive; recovered litter usually available to ship in 3 to 4 months.
Fee/unit (US $)
|Litter||Recovered litter1; additional fees for any special requests.|
1 The distribution fee covers the expense of resuscitating mice from the cryo-archive; you will receive the resulting litter. The litter will contain at minimum one mutant carrier; the actual number of animals and the gender and genotype ratios will vary. (Typically, multiple breeder pairs can be established from the recovered litter.) Prior to shipment, the MMRRC will provide information about the animals recovered. If you anticipate or find that you need to request specific genotypes, genders or quantities of mice in excess of what is likely from a resuscitated litter, you may discuss available options and pricing with the supplying MMRRC facility.
2 An aliquot is one straw or vial with sufficient sperm to recover at least one litter of mice, as per provided protocols, when performed at the MMRRC facility. The MMRRC makes no guarantee concerning the success of these procedures when performed outside the MMRRC facilities.
3 An aliquot contains a sufficient number of embryos (in one or more vials and based on the transfer success rate of the MMRRC facility) to transfer to at least two recipients. The MMRRC makes no guarantee concerning embryo transfer success experienced in the recipient investigator's laboratory. Neither gender nor genotype ratios are guaranteed.
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.