Overo refers to several genetically unrelated pinto coloration patterns of white-over-dark body markings in horses, and is a term used by the American Paint Horse Association to classify a set of pinto patterns that are not tobiano. Overo is a Spanish word, originally meaning "like an egg".[1] The most common usage refers to frame overo, but splashed white and sabino are also considered "overo".[2][3] A horse with both tobiano and overo patterns is called tovero.
Frame overo, splashed white, and sabino are three separate pinto patterns, genetically unrelated, that are grouped together under the name "overo".
The frame overo pattern tends to have white spots on the flanks and face, surrounded by a dark "frame" of color. If two horses with the frame overo gene are bred together, there is a 25% chance the foal will have lethal white syndrome.[4]
Splashed white or splash overo is a group of patterns that tend to have white on the underside, as if a horse ran through white paint with its head lowered. So far 6 alleles on two genes have been discovered to cause splashed white patterns. There is a correlation between the splashed white pattern and deafness.[5]
Sabino or sabino overo is a group of patterns that typically have white on the legs, face, and sometimes also belly, often with white ticking or roaning. Several alleles on the KIT gene are known to cause sabino or sabino-like patterns.[6][7]
^American Paint Horse Association's Guide to Coat Color Genetics American Paint Horse Association, 2007. Archived 2008-10-11 at the Wayback Machine Accessed August 19, 2008
^"Genetic Equation: The overo patterns" American Paint Horse Association. Archived 2008-09-07 at the Wayback Machine Web page accessed August 19, 2008
^"Horse coat color tests" Archived 2009-06-15 at the Wayback Machine from the University of California, Davis Veterinary Genetics Lab
^"Lethal White Overo (LWO)". Retrieved Dec 20, 2021.
^"Splashed White Mutations – SW1, SW2, SW3, SW4, SW5, and SW6". Retrieved Dec 20, 2021.
^"Sabino 1". Retrieved Dec 20, 2021.
^"More about Dominant White". Retrieved Dec 20, 2021.
Overo refers to several genetically unrelated pinto coloration patterns of white-over-dark body markings in horses, and is a term used by the American...
Lethal white syndrome (LWS), also called overo lethal white syndrome (OLWS), lethal white overo (LWO), and overo lethal white foal syndrome (OLWFS), is...
lower legs are normally dark. The APHA recognizes three overo patterns: Frame: The most familiar overo pattern, the gene for frame has been genetically mapped...
specifying the exact pinto pattern. These include: Overo: A collective term used primarily by the APHA, overo essentially means "pinto, but not tobiano". It...
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attractions was the hot springs, with sulfur waters running down from del Overo Volcano, maintaining the pond hot and filled. After 1953, the luxurious...
Splashed white or splash is a horse coat color pattern in the "overo" group of spotting patterns that produces pink-skinned, white markings. Many splashed...
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dark. Three less common spotting genes are the sabino, frame, and splash overo genes, which create various patterns that are mostly dark, with jagged spotting...
Cerro Overo is a volcanic crater in Chile. It lies at the foot of Chiliques volcano and close to Laguna Lejía, over ignimbrites of Pliocene age erupted...
dito piccolo, et resterà in modo de bindelle, overo stringhe. Et mitteli accocere in brodo grasso, overo in acqua secundo il tempo. Et vole bollire quando...
tobiano gene. Other spotting patterns seen in pinto horses include frame overo, splashed white and sabino. In the United Kingdom, tobianos are frequently...
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subdivided into several subunits (members). From oldest to youngest: Bayo Overo (Correlates with both the Puesto La Paloma and the Cerro Castaño members)...
mostly dark. Three less common spotting genes are the frame and splash overo genes, which create a mostly dark, jagged spotting with a horizontal orientation...
Chloroleucon chacoense, the palo barroso or palo overo, is a species of flowering plant in the family Fabaceae. It is found in Argentina, Bolivia, and...
variations based on the observable shape of the white patterns include: Overo: Describes a group of spotting patterns genetically distinct from one another...
L'Aldimiro overo Favor per favore dramma per musica 3 acts Giuseppe Domenico de Totis 6 November 1683 Naples, Palazzo Reale La Psiche overo Amore innamorato...
typically exhibit the "frame overo" spotting pattern. In cases of "solid" horses with frame overo ancestry, uncertain "overo" (non-tobiano) phenotype, or...
mostly dark. Three less common spotting genes are the frame and splash overo genes, which create a mostly dark, jagged spotting with a horizontal orientation...
first appeared in 1603 in Giovanni Artusi's book Seconda Parte dell'Artusi, overo Delle imperfettioni della moderna musica (The Second Part of The Artusi...
TurnTable. Retrieved 5 March 2023. "MOHBAD". OCC. Retrieved 27 September 2023. Overo, Naomi (24 November 2022). "Mohbad Toasts to the Future in New Single, "Weekend""...
Docciolini, Trattato in Materia di Scherma – 1601 Nicoletto Giganti, Scola overo Teatro – 1606 Ridolfo Capo Ferro, Gran Simulacro dell'Arte e dell'Uso della...
pharmacokinetic evaluation". Current Therapeutic Research. 34 (1): 1–6. Jørgensen A, Overø KF (1980). "Clopenthixol and flupenthixol depot preparations in outpatient...
crossbreeding, the gene that causes the condition also creates the frame overo color pattern when heterozygous, and the color pattern was not always visibly...
probability Fund for the Replacement of Animals in Medical Experiments Frame Overo, a coat pattern in horses Hive frame, a structural element that holds honeycomb...
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