Blue Egg (Oocyan – O) Genetic Test

Identify carriers and confirm, the genetic source of blue or green eggshell pigmentation.

$14.00

This PCR-based DNA test detects the Oocyan (O) allele, which causes the natural deposition of biliverdin and zinc chelates in the eggshell, resulting in blue or blue-green pigmentation. This test distinguishes between non-carriers, carriers, and chickens that will pass the blue egg gene to offspring.

The blue egg trail is caused by the autosomal dominant O allele. Only one copy is needed to produce blue pigmentation inside the shell. Chickens carrying O will lay blue or green eggs, depending on the presence of brown overlay genes. This test determines whether a chicken is:

O/O – Homozygous Blue
O/o – Heterozygous Carrier of Blue
o/o – Non-blue layer

This test does confirm:

Presence or absence of the Oocyan (O) allele
Zygosity (O/O vs O/o vs o/o)
Genetic basis of blue or green eggshell color

This test does NOT confirm:

Brown shell genes
Specific shades of blue, green, or olive
Bloom, speckling, or cuticle thickness traits

Sample Type: Blood on the tip of a coffee filter or printer paper cut into a triangle. Please see our SAMPLING PAGE for instructions and desired amount of blood needed.
Turnaround Time: Results are typically back the same day samples are received at the lab. Please allow 48 hours before reaching out about your results. You will receive an email once your samples have been logged into our computer system here at the lab. Please purchase a tracking number for your convenience of knowing when your sample will arrive. Thank you for understanding.