Tiger eye
a color of horses' eyes seen in the Puerto Rican Paso Fino
Tiger eye or goat eye is a gene causing diluted eye color in horses. There are two variants, Tiger-eye 1 (TE1) and Tiger-eye 2 (TE2), which are both recessive. Horses displaying tiger eye typically have a yellow, orange, or amber iris. Tiger eye has only been found in Puerto Rican Paso Fino horses. Horses of related breeds were tested (90 Colombian Pasos, 20 Mangalargas, 44 Lusitanos, and 42 Andalusian horses), and none were found to have either tiger eye allele. No obvious link between eye shade and coat color was seen, making this the first studied gene in horses to affect eye color but not coat color. Tiger eye does not appear to affect vision, and there were no signs of reduced pigment on the retina or retinal pigment epithelium.
Genotypes
TE1/TE1 or TE1/TE2: Yellow, amber, or bright orange eyes.
TE2/TE2: Blue eyes when in combination with cream. It is not known what this looks like without cream.
“Tiger eye” enters the record as a color of horses' eyes seen in the Puerto Rican Paso Fino. Crown Archives preserves that source wording while asking what Tiger, color and horses' can confirm, complicate or overturn.
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This entry incorporates text from “Tiger eye” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.