Splashed white is a variable white spotting pattern characterized by a large blaze, extended white markings on legs, variable white spotting on belly, pink skin and often blue eyes. En otros casos, las áreas no pigmentadas son bastante pequeñas y no se pueden distinguir de los caballos con otros fenotipos de despigmentación más sutiles. Los caballos blancos salpicados a veces son sordos, sin embargo, la mayoría de los caballos blancos salpicados no son sordos. La pérdida de audición se debe a la muerte de las células ciliadas necesarias, causada por la ausencia de melanocitos en el oído interno. Aunque la mayoría de los caballos de salpicadura tienen pigmento alrededor del exterior de la oreja, el pigmento debe aparecer en el oído interno para evitar la pérdida de audición. Hay varias mutaciones diferentes identificadas que están asociadas con patrones blancos salpicados. The Coat White Spotting 1 test (P512) tests for the mutation known as SW1 in the MITF gene. Esta prueba detecta dos variantes (alelos). El alelo SW1 es dominante. Una o dos copias del alelo SW1 dan como resultado un blanco salpicado. El alelo N es recesivo y no tiene efecto en el color básico.
The Coat Colour White Spotting 1 test encloses the following results, in this scheme the results of the Coat Colour White Spotting 1 test are shown in combination with the possible results for the tests that determine the basic Coat Colour (Coat Colour Chestnut and Coat Colour Agouti test):
|
Result White Spotting 1 |
Result Chestnut + Agouti |
Coat Colour |
Descripción |
|---|---|---|---|
|
N/N |
e/e + A/A, A/a or a/a
|
Chestnut, Sorrel
|
Not Splashed White. The basic colour chestnut/sorrel is not modified unless modified by other colour modifying genes. It can only pass on allele N to its offspring. |
|
N/N |
E/E or E/e + A/A or A/a |
Bay, Brown |
Not Splashed White The basic colour bay/brown is not modified unless modified by other colour modifying genes. It can only pass on allele N to its offspring. |
|
N/N |
E/E or E/e + a/a |
Black |
Not Splashed White. The basic colour black is not modified unless modified by other colour modifying genes. It can only pass on allele N to its offspring. |
|
N/SW1 |
e/e + A/A, A/a or a/a
|
Chestnut/sorrel with Splashed White pattern |
Splashed White pattern. One copy of the SW1 allele. The horse will display some degree of white spotting but the specific pattern cannot be predicted, unless modified by other colour modifying genes. It can pass on either allele N or SW1 to its offspring. |
|
N/SW1 |
E/E or E/e + A/A or A/a |
Brown/bay with Splashed White pattern |
Splashed White pattern. One copy of the SW1 allele. The horse will display some degree of white spotting but the specific pattern cannot be predicted, unless modified by other colour modifying genes. It can pass on either allele N or SW1 to its offspring. |
|
N/SW1 |
E/E or E/e + a/a |
Black with Splashed White pattern |
Splashed White pattern. One copy of the SW1 allele. The horse will display some degree of white spotting but the specific pattern cannot be predicted, unless modified by other colour modifying genes. It can pass on either allele N or SW1 to its offspring. |
|
SW1/SW1 |
e/e + A/A, A/a or a/a |
Chestnut/sorrel with Splashed White pattern |
Splashed White pattern. Two copies of the SW1 allele. The horse will display some degree of white spotting but the specific pattern cannot be predicted, unless modified by other colour modifying genes. It can only pass on allele SW1 to its offspring. |
|
SW1/SW1 |
E/E or E/e + A/A or A/a |
Brown/bay with Splashed White pattern |
Splashed White pattern. Two copies of the SW1 allele. The horse will display some degree of white spotting but the specific pattern cannot be predicted, unless modified by other colour modifying genes. It can only pass on allele SW1 to its offspring. |
|
SW1/SW1 |
E/E or E/e + a/a |
Black with Splashed White pattern |
Splashed White pattern. Two copies of the SW1 allele. The horse will display some degree of white spotting but the specific pattern cannot be predicted, unless modified by other colour modifying genes. It can only pass on allele SW1 to its offspring. |