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Solid White (chicken Plumage)
In poultry standards, solid white is Animal coloration, coloration of plumage in chickens (''Gallus gallus domesticus'') characterized by a uniform pure white color across all feathers, which is not generally associated with depigmentation in any other part of the body. Color is an important feature of most living organisms. In the wild, color has great significance affecting the survival and reproductive success of the species. The environmental constraints which lead to the specific colors of birds and animals are very strong and individuals of novel colors tend not to survive. Under domestication, mankind has transformed all the species involved which have thus been freed from environmental pressures to a large extent. Early color variants were mostly selected for utility reasons or religious practices. In more recent centuries color varieties have been created purely for ornament and pleasure, fashion playing a surprisingly large part in their development. A bewildering array o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhode Island White Hen
Rhode may refer to: *In Greek mythology: :*Rhodos, goddess and personification of the island of Rhodes :*Rhode, one of the fifty daughters of Danaus *Rhode (spider), ''Rhode'' (spider), a genus of spiders *Rhode (surname) *Rhode, County Offaly, an Irish town *Rhode, now Roses, Girona, Spain *Rhode, a suburb of Olpe, Germany *Rhode River, Maryland *Rhode-Saint-Genèse, a Belgian municipality See also * *Rhode Island, the smallest U.S. state by area *Rode (other) *Rhodes (other) *Rohde {{disambiguation, geo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Melanin
Melanin (; from el, μέλας, melas, black, dark) is a broad term for a group of natural pigments found in most organisms. Eumelanin is produced through a multistage chemical process known as melanogenesis, where the oxidation of the amino acid tyrosine is followed by polymerization. The melanin pigments are produced in a specialized group of cells known as melanocytes. Functionally, eumelanin serves as protection against Ultraviolet, UV radiation. There are five basic types of melanin: eumelanin, pheomelanin, neuromelanin, allomelanin and pyomelanin. The most common type is eumelanin, of which there are two types— brown eumelanin and black eumelanin. Pheomelanin, which is produced when melanocytes are malfunctioning due to derivation of the gene to its recessive format is a cysteine-derivative that contains polybenzothiazine portions that are largely responsible for the of red yellow tint given to some skin or hair colors. Neuromelanin is found in the brain. Research ha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brahma Chicken
The Brahma is an American breed of chicken. It was developed in the United States from birds imported from the Chinese port of Shanghai, and was the principal American meat breed from the 1850s until about 1930. History There has been controversy and confusion over the origin of the Brahma. It appears to have developed in the United States from large birds, with heavily feathered legs, imported in the 1840s from the Chinese port of Shanghai, and thus known as "Shanghai" birds. The distinctive head shape and pea comb of the Brahma probably result from cross-breeding with Grey Chittagong birds of Malay type, imported from Chittagong in eastern Bengal (now Bangladesh); these characteristics distinguish the Brahma from the Cochin, which also derives from "Shanghai" birds. At first there were many different strains and at least a dozen different names for the breed. At a meeting of poultry judges in Boston in 1852, agreement was reached to name it "Brahmapootra"; this later becam ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cornish (chicken)
The Indian Game is a British breed of game chicken, now reared either for meat or show. It originated in the early nineteenth century in the counties of Cornwall and Devon in south-west England. It is a heavy, muscular bird with an unusually broad breast; the eggs are brown. In the United States the name was changed in the early twentieth century to Cornish. A white variant, the White Cornish, was developed there at about the same time, and is much used in modern industrial chicken meat production in many parts of the world, either for cross-breeding to produce hybrid broilers, or to produce fast-growing " game hens". History The breed was developed by Sir Walter Gilbert, of Bodmin in Cornwall, in about 1820. It was intended to be a gamecock, but had no aptitude for cockfighting. It is recognised as "Indian Game" in Australia, by the Poultry Club of Great Britain in the United Kingdom, and by the Entente Européenne in Europe. In the United States the name was change ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hamburg (chicken)
The Hamburg, nl, Hollands hoen, italic=no, german: Hamburger, italic=no, is a breed of chicken which is thought to have originated in Holland (in some sources, Hamburg, Germany) sometime prior to the fourteenth century. The name may be spelled Hamburgh in the United Kingdom and in Australia. Characteristics The Hamburg is a small or medium-sized breed. Cocks weigh and hens about , with slender legs and a neat rose comb. Ring size is for cocks and for hens. Eleven different colour varieties are recognised in Germany and Holland, including silver-spangled, gold-spangled, gold-pencilled, citron-pencilled, silver-pencilled, white, black and citron-spangled; six of these are included in the American standard of perfection. Pencilled breeds are smallest and self-coloured birds are largest. There are also Bantam Hamburgs. Use Hamburgs mature quickly and are considered good egg producers. Eggs weigh about 50 g, with glossy, white shells. In literature Lalia Phipps Boone ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Epistasis
Epistasis is a phenomenon in genetics in which the effect of a gene mutation is dependent on the presence or absence of mutations in one or more other genes, respectively termed modifier genes. In other words, the effect of the mutation is dependent on the genetic background in which it appears. Epistatic mutations therefore have different effects on their own than when they occur together. Originally, the term ''epistasis'' specifically meant that the effect of a gene variant is masked by that of a different gene. The concept of ''epistasis'' originated in genetics in 1907 but is now used in biochemistry, computational biology and evolutionary biology. The phenomenon arises due to interactions, either between genes (such as mutations also being needed in regulators of gene expression) or within them (multiple mutations being needed before the gene loses function), leading to non-linear effects. Epistasis has a great influence on the shape of evolutionary landscapes, which l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Albinism
Albinism is the congenital absence of melanin in an animal or plant resulting in white hair, feathers, scales and skin and pink or blue eyes. Individuals with the condition are referred to as albino. Varied use and interpretation of the terms mean that written reports of albinistic animals can be difficult to verify. Albinism can reduce the survivability of an animal; for example, it has been suggested that albino alligators have an average survival span of only 24 hours due to the lack of protection from UV radiation and their lack of camouflage to avoid predators. It is a common misconception that all albino animals have characteristic pink or red eyes (resulting from the lack of pigment in the iris allowing the blood vessels of the retina to be visible), however this is not the case for some forms of albinism. Familiar albino animals include in-bred strains of laboratory animals (rats, mice and rabbits), but populations of naturally occurring albino animals exist in the wil ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Albinism
Albinism is the congenital absence of melanin in an animal or plant resulting in white hair, feathers, scales and skin and pink or blue eyes. Individuals with the condition are referred to as albino. Varied use and interpretation of the terms mean that written reports of albinistic animals can be difficult to verify. Albinism can reduce the survivability of an animal; for example, it has been suggested that albino alligators have an average survival span of only 24 hours due to the lack of protection from UV radiation and their lack of camouflage to avoid predators. It is a common misconception that all albino animals have characteristic pink or red eyes (resulting from the lack of pigment in the iris allowing the blood vessels of the retina to be visible), however this is not the case for some forms of albinism. Familiar albino animals include in-bred strains of laboratory animals (rats, mice and rabbits), but populations of naturally occurring albino animals exist in the wil ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Croad Langshan
The Croad Langshan is an old, heavy, soft-feathered chicken breed which probably originated in China. Origin The first recorded imports came from the Langshan ('Wolf Mountain') area in the outskirts of Nantong, just north of the lower reaches of the Yangtse-Kiang River in China) in 1872 and were undertaken by Major F.T. Croad who imported the breed into Britain. Major Croad's niece, Miss A. C. Croad, has been credited with establishing the breed in Britain. The Croad Langshan Club was formed in Britain in 1904. The name ‘Croad’ distinguishes the original type of Langshan, imported by Major Croad, which were a utility fowl of great merit, from the tall Modern Langshans which have been developed for the show pen. As with many other breeds, numbers declined after the Second World War and eventually the breed was left without a breed club in the UK. It was rescued by the Rare Poultry Society until in 1979 the club was reformed. Langshans were also imported to North Americ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Minorca (chicken)
The Minorca, ca, Gallina de Menorca, italic=no, es, Menorquina, italic=no, is a breed of domestic chicken originating in the Mediterranean island of Menorca, in the Balearic Islands to the south-east of Spain. It is a well-known exhibition bird in many countries of the world, but in the island of Menorca is an endangered breed and considered to be at risk of extinction. History The international type of Minorca was created by the British from indigenous Menorcan birds. This process began during the British occupation of the island from 1708 to 1783, but It is not clear if it took place there or in Britain. It is likely that it began in Menorca and continued in Britain, where imports of chickens from Menorca in the 1780s are documented. By about 100 years later, the breed (which was considered a variety of the "Spanish") was common and long-established in Devon and Cornwall, in the south-west of England, where it was highly regarded as an egg-laying breed. It had been exhibited ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Indian Game
The Indian Game is a British breed of game chicken, now reared either for meat or show. It originated in the early nineteenth century in the counties of Cornwall and Devon in south-west England. It is a heavy, muscular bird with an unusually broad breast; the eggs are brown. In the United States the name was changed in the early twentieth century to Cornish. A white variant, the White Cornish, was developed there at about the same time, and is much used in modern industrial chicken meat production in many parts of the world, either for cross-breeding to produce hybrid broilers, or to produce fast-growing " game hens". History The breed was developed by Sir Walter Gilbert, of Bodmin in Cornwall, in about 1820. It was intended to be a gamecock, but had no aptitude for cockfighting. It is recognised as "Indian Game" in Australia, by the Poultry Club of Great Britain in the United Kingdom, and by the Entente Européenne in Europe. In the United States the name was change ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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