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Popular Sire Effect
The popular sire effect (or popular stud/sire syndrome) occurs when an animal with desirable attributes is bred repeatedly. In dog breeding, a male dog that wins respected competitions becomes highly sought after, as breeders believe the sire possesses the genes necessary to produce champions. However, the popular sire effect is not just down to wanting to produce a champion. For example, in Staffordshire Bull Terriers there are several popular sires who are used by breeders to produce specific colours that are not favoured in the show ring. The popular sire is often bred extensively with many females. This can cause undetected, undesirable genetic traits in the stud to spread rapidly within the gene pool. It can also reduce genetic diversity by the exclusion of other males. While a popular stud can sire a large number of litters, the effect of a popular dam is more limited. The constraints of the female reproductive cycle requires dams to have several months in between each litter ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scottish Terrier Sire
Scottish usually refers to something of, from, or related to Scotland, including: *Scottish Gaelic, a Celtic Goidelic language of the Indo-European language family native to Scotland *Scottish English *Scottish national identity, the Scottish identity and common culture *Scottish people, a nation and ethnic group native to Scotland *Scots language, a West Germanic language spoken in lowland Scotland * Symphony No. 3 (Mendelssohn), a symphony by Felix Mendelssohn known as ''the Scottish'' See also *Scotch (other) *Scotland (other) *Scots (other) *Scottian (other) *Schottische The schottische is a partnered country dance that apparently originated in Bohemia. It was popular in Victorian era ballrooms as a part of the Bohemian folk-dance craze and left its traces in folk music of countries such as Argentina (" chotis"Sp ... * {{disambiguation Language and nationality disambiguation pages ca:Escocès ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rage Syndrome
Rage syndrome is a rare seizure disorder in dogs, characterized by explosive aggression. It is frequently confused with idiopathic aggression, a term for aggression with no identifiable cause. Rage syndrome is most often a misdiagnosis of dogs with an unrelated, but more common, form of aggression. Although the scientific evidence is limited, it is thought to be genetic in origin, and is heritable. It is treated with antiepileptics. Names Rage syndrome has been known by a variety of names since it was discovered. Rage syndrome is a colloquial term most often preferred by dog trainers, handlers, and some behavior consultants. Alternative names used by researchers, veterinary scientists, and behavior specialists include mental lapse syndrome (MLS) and episodic dyscontrol. Rage syndrome is also sometimes termed a form of epilepsy, particularly limbic epilepsy. The term limbic epilepsy for rage syndrome has been used synonymously with the terms psychomotor epilepsy, automatic e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Breed Registry
A breed registry, also known as a herdbook, studbook or register, in animal husbandry and the hobby of animal fancy, is an official list of animals within a specific breed whose parents are known. Animals are usually registered by their breeders while they are young. The terms studbook and register are also used to refer to lists of male animals "standing at stud", that is, those animals actively breeding, as opposed to every known specimen of that breed. Such registries usually issue certificates for each recorded animal, called a pedigree, pedigreed animal documentation, or most commonly, an animal's "papers". Registration papers may consist of a simple certificate or a listing of ancestors in the animal's background, sometimes with a chart showing the lineage. Types of registries There are breed registries and breed clubs for several species of animal, such as dogs, horses, cows and cats. The US ''Association of Zoos and Aquariums'' (AZA) also maintains stud books for captiv ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Association Of Zoos And Aquariums
The Association of Zoos and Aquariums (AZA), originally the American Association of Zoological Parks and Aquariums, is an American 501(c)(3) nonprofit organization founded in 1924 and dedicated to the advancement of zoos and public aquariums in the areas of conservation, education, science, and recreation. AZA is headquartered in Silver Spring, Maryland, United States, and accredits zoos. There were 238 accredited facilities as of 2019, primarily in the US, and also a handful in eleven other countries. History In October 1924 the American Association of Zoological Parks and Aquariums was formed as an affiliate of the American Institute of Park Executives. In 1966, the American Association of Zoological Parks and Aquariums became a professional branch affiliate of the newly formed National Recreation and Park Association, which absorbed the American Institute of Park Executives. In the fall of 1971, the American Association of Zoological Parks and Aquariums membership voted t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Akita Inu
The is a historic dog breed of large size originating from the mountains of northern Japan. The two separate varieties of Akita are a pure Japanese strain, commonly called Akita-ken (''ken'' is the on'yomi for ''inu'' meaning dog in Japanese), and a mixed American strain, commonly larger. The Akita has a short double coat similar to that of many other northern spitz breeds. The Akita is a powerful, independent, and dominant breed, commonly aloof with strangers, but affectionate and deeply loyal with its family. As a breed, Akitas are generally hardy. Historically they were used as guard dogs, fighting dogs and for the hunting of bears. Breed name Debate exists among fanciers whether these are two separate breeds of Akitas. As of 2020, the American Kennel Club, now considers American and Japanese Akitas to be two separate breeds, no longer allowing free breeding between the two. The United Kennel Club, the Federation Cynologique Internationale, The Kennel Club, the Australian ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Greyhound
The English Greyhound, or simply the Greyhound, is a breed of dog, a sighthound which has been bred for coursing, greyhound racing and hunting. Since the rise in large-scale adoption of retired racing Greyhounds, the breed has seen a resurgence in popularity as a family pet. Greyhounds are defined as a tall, muscular, smooth-coated, "S-shaped" type of sighthound with a long tail and tough feet. Greyhounds are a separate breed from other related sighthounds, such as the Italian greyhound. The Greyhound is a gentle and intelligent breed whose combination of long, powerful legs, deep chest, flexible spine, and slim build allows it to reach average race speeds exceeding . The Greyhound can reach a full speed of within , or six strides from the boxes, traveling at almost for the first of a race. Appearance Males are usually tall at the withers, and weigh on average . Females tend to be smaller, with shoulder heights ranging from and weights from , although weights can ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Golden Retriever
The Golden Retriever is a Scottish breed of retriever dog of medium size. It is characterised by a gentle and affectionate nature and a striking golden coat. It is commonly kept as a pet and is among the most frequently registered breeds in several Western countries. It is a frequent competitor in dog shows and obedience trials; it is also used as a gundog, and may be trained for use as a guide dog. The breed was created by Sir Dudley Marjoribanks at his Scottish estate Guisachan in the late nineteenth century. He cross-bred Flat-coated Retrievers with Tweed Water Spaniels, with some further infusions of Red Setter, Labrador Retriever and Bloodhound. The breed was recognised by the Kennel Club in 1913, and during the interwar period spread to many parts of the world. History The Golden Retriever was developed in Scotland in the nineteenth century by Sir Dudley Marjoribanks (later to become Baron Tweedmouth) from Flat-coated Retrievers judiciously crossed wit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hyperkalemic Periodic Paralysis (equine)
Hyperkalemic periodic paralysis (HYPP, HyperKPP) is a genetic disorder that occurs in horses. It is also known as Impressive syndrome, after an index case in a horse named Impressive. It is an inherited autosomal dominant disorder that affects sodium channels in muscle cells and the ability to regulate potassium levels in the blood. It is characterized by muscle hyperexcitability or weakness which, exacerbated by potassium, heat or cold, can lead to uncontrolled shaking followed by paralysis. The mutation which causes this disorder is dominant on SCN4A with linkage to the sodium channel expressed in muscle. The mutation causes single amino acid changes in parts of the channel which are important for inactivation. In the presence of high potassium levels, including those induced by diet, sodium channels fail to inactivate properly. Equine hyperkalemic periodic paralysis occurs in 1 in 50 Quarter Horses and can be traced to a single ancestor, a stallion named Impressive. S ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Australian Shepherd
The Australian Shepherd is a breed of herding dog from the United States. The name of the breed is technically a misnomer, as it was developed in California in the 19th century; the breed was unknown in Australia at the time. It is claimed that Australian Shepherds descend from a variety of herding breeds, including collies imported, alongside sheep, from Australia and New Zealand; the breed reportedly took its name from this trade. Originally used solely as a herding dog, the Australian Shepherd has become one of the most popular companion dog breeds in North America. History The Australian Shepherd descends in part from pastoral dogs brought to herd Spanish flocks in North America as early as the 1500s. There is some speculation that these dogs included the Carea Leonés, a mountain sheepdog that can display the eye color and merle coat found in many contemporary Australian Shepherds. It is sometimes claimed that the Basque Shepherd Dog and the Pyrenean Sheepdog were also amon ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Backcrossing
Backcrossing is a crossing of a hybrid with one of its parents or an individual genetically similar to its parent, to achieve offspring with a genetic identity closer to that of the parent. It is used in horticulture, animal breeding, and production of gene knockout organisms. Backcrossed hybrids are sometimes described with acronym "BC"; for example, an F1 hybrid crossed with one of its parents (or a genetically similar individual) can be termed a BC1 hybrid, and a further cross of the BC1 hybrid to the same parent (or a genetically similar individual) produces a BC2 hybrid. Plants Advantages * If the recurrent parent is an elite genotype, at the end of the backcrossing programme, an elite genotype is recovered. * As no "new" recombination results, the elite combination is not lost. Disadvantages * It works poorly for quantitative traits. * It is more restricted for recessive traits. * In practice, sections of genome from the nonrecurrent parents are often still presen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
