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the pdonkeyoodle is a rare species of lesser intelligent lesser spotted derby hiper sauras |
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{{For|the industrial-metal band|Crossbreed (band)}} |
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[[File:Rusty.jpg|thumb|upright|A [[Labradoodle]], a crossbreed between a [[poodle]] and a [[retriever]]]] |
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A '''crossbreed ''' or '''crossbred''' usually refers to an animal with [[purebred]] parents of two different breeds, varieties, or populations. ''Crossbreeding'' refers to the process of breeding such an animal, often with the intention to create offspring that share the traits of both parent lineages, or producing an animal with [[Heterosis|hybrid vigor]]. While crossbreeding is used to maintain health and viability of animals, irresponsible crossbreeding can also produce animals of inferior quality or dilute a [[purebred]] gene pool to the point of [[extinct]]ion of a given [[breed]] of animal.{{Citation needed|date=July 2012}} |
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The term is also used at times to refer to a domestic animal of unknown ancestry where the breed status of only one parent or grandparent is known, though the term "mixed breeding" is technically more accurate. The term [[outcross]] is used to describe a type of crossbreeding used within a purebred breed to increase the genetic diversity within the breed, particularly when there is a need to avoid [[inbreeding]]. |
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In general use, the term ''[[Hybrid (biology)|hybrid]]'' is commonly used to refer to plant breeding, such as that of [[maize]], though "hybrid" is also used to describe crosses between animals of the same genus but different species, such as the [[mule]]. ''"Crossbred"'' is more often used to refer to animal breeding within a single species. |
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== Crossbreeds in specific animals == |
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=== Cattle === |
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In cattle, there are systems of crossbreeding. One is used when the purebred females are particularly adapted to a specific environment, and are crossed with purebred bulls from another environment to produce a generation having traits of both parents.<ref>[http://www2.dpi.qld.gov.au/beef/2243.html Cross breeding systems for beef cattle larger] Department of Primary Industries and Fisheries, Queensland</ref> |
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=== Sheep === |
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The large number of breeds of sheep, which vary greatly, creates an opportunity for cross breeding to be used to tailor production of lambs to the goal of the individual stockman.<ref>[http://ag.ansc.purdue.edu/sheep/ansc442/Semprojs/2003/crossbrd/ansc442.htm Crossbreeding In Sheep, by Angie Bailey, Jason Canup and Jorge Lucena] Purdue University, USA</ref> |
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=== Llamas === |
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Results of crossbreeding classic and woolly breeds of llama are unpredictable. The resulting offspring displays physical characteristics of either parent, or a mix of characteristics from both, periodically producing a fleeced llama. |
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The results are increasingly unpredictable when both parents are crossbreeds, with possibility of the offspring displaying characteristics of a grandparent, not obvious in either parent. <ref> [http://lostcreekllamas.com/classic.htm What is a classic llama?]</ref> |
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=== Dogs === |
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{{Main|Dog hybrid|dog breed}} |
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A ''crossbred'' or ''hybrid'' dog is a cross between two (sometimes more) known breeds, and is usually distinguished from a ''[[mixed-breed dog]]'', which has ancestry from many sources, some of which may not be known. Crossbreeds are popular, due to the belief that they have increased hybrid vigor without loss of attractiveness of the dog. Certain planned cross-breeding between purebred dogs of different breeds can produce puppies worth more than their purebred parents, due to a high demand.{{Citation needed|date=November 2010}} |
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===Horses=== |
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[[File:National Show Horse.jpg|thumb|The [[National Show Horse]] was developed from crossbreeding programs in the 1970s and 1980s that blended [[Arabian horse]] and [[American Saddlebred]] bloodlines]] |
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Crossbreeding in horses is often done with the intent of ultimately creating a new breed of horse. One type of modern crossbreeding in horses is used to create many of the [[warmblood]] breeds. Warmbloods are a type of horse used in the [[sport horse]] disciplines, usually registered in an [[open stud book]] by a [[studbook selection]] procedure that evaluates conformation, pedigree and, in some animals, a training or performance standard. Most warmblood breeds began as a cross of [[draft horse]] breeds on [[Thoroughbred]]s, but have, in some cases, developed over the past century to the point where they are considered to be a true-breeding population and have a [[closed stud book]]. Other types of recognized crossbreeding include that within the [[American Quarter Horse]], which will register horses with one Thoroughbred parent and one registered Quarter Horse parent in the "Appendix" registry, and allow such animals full breed registration status as Quarter Horses if they meet a certain performance standard. Another well-known crossbred horse is the [[Anglo-Arabian]], which may be produced by a purebred [[Arabian horse]] crossed on a Thoroughbred, or by various crosses of Anglo-Arabians with other Anglo-Arabians, as long as the ensuing animal never has more than 75% or less than 25% of each breed represented in its pedigree. |
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== Hybrid animals == |
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{{Main|Hybrid (biology)}} |
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A [[Hybrid (biology)|hybrid]] animal is one with parentage of two separate species, differentiating it from crossbred animals, which have parentage of the same species. Hybrids are usually, but not always, sterile.<ref>[http://news.softpedia.com/news/Why-Hybrids-Are-Sterile-42118.shtml Why Are Hybrids Sterile ? - Because of gene evolution]</ref> |
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One of the most ancient types of hybrid animal is the [[mule]], a cross between a female [[horse]] and a male [[donkey]] or ass. The [[liger]] is a [[Hybrid (biology)|hybrid]] cross between a male [[lion]] and female [[tiger]]. The [[yattle]] is a cross between a [[cow]] and a [[yak]]. Other crosses include the [[tigon]] (between a female lion and male tiger) and [[yakalo]] (between a yak and [[domestic buffalo|buffalo]]). The Incas recognized that hybrids of Lama glama (llama) and Lama pacos (alpaca) resulted in a hybrid with none of the advantages of either parent.<ref>[http://alpacasincanada.com/history.html An Ancient Livestock, by Barbara Lang]</ref> |
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At one time it was thought that dogs and wolves were separate species, and the [[Wolf-dog hybrid|crosses between dogs and wolves]] were called wolf hybrids. Today wolves and dogs are both recognized as ''[[Canis lupus]]'', but the old term "wolf hybrid" is still used. |
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== Mixed breeds == |
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{{Main|Mixed breed}} |
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A mixed-breed animal is defined as having undocumented or unknown parentage, while a crossbreed generally has known, usually [[purebred]] parents of two distinct breeds or varieties. A dog of unknown parentage is often called a [[mixed-breed dog]], "mutt" or "mongrel." A cat of unknown parentage is often referred to as [[Domestic short-haired cat|domestic short-haired]] or [[domestic long-haired cat]] generically, and in some dialects is often called a "moggy". A horse of unknown bloodlines is a [[grade horse]]. |
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==See also== |
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* [[Artificial selection]] |
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* [[Dog hybrids and crossbreeds]] |
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* [[Heterosis]] |
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* [[Purebred]] |
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* [[Selective breeding]] |
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* [[Outcross]] |
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== References == |
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{{Reflist}} |
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{{Breed}} |
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[[Category:Animal breeding]] |
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[[Category:Genetics]] |
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[[de:Hybride]] |
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[[pl:Krzyżówka (genetyka)]] |
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[[tr:Hibrid (Biyoloji)]] |
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[[es:Híbrido (biología)]] |
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[[fr:métissage]] |
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[[ja:雑種]] |
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Revision as of 15:17, 26 February 2013
the pdonkeyoodle is a rare species of lesser intelligent lesser spotted derby hiper sauras