|
Blue Grey Cattle
The Blue Grey is a cattle hybrid traditional in south-western Scotland and north-western England. It is blue roan in colour, and results from breeding a black Galloway cow to a white Shorthorn bull. It is reared principally as a suckler cow, and is particularly well suited to upland grazing. History In south-western Scotland and north-western England, Shorthorn bulls were used from the early nineteenth century on black Galloway cows to produce vigorous hybrid calves. If the bull was white, the calf was blue roan in colour; these were easily recognisable and were much in demand. In the later nineteenth century, selection of the Whitebred Shorthorn was begun specifically to supply white sires for production of these calves. Characteristics The Blue Grey is blue roan in colour, and is polled (without horns). Cows have high amounts of body fat compared to other hybrids in similar overall condition, and are able to produce adequate quantities of milk even on poor grazin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Roan (color)
Roan is a coat color found in many animals, including horses, cattle, Roan_antelope, antelope, Lykoi, cats and dogs. It is defined generally as an even mixture of white and pigmented hairs that do not Gray (horse), "gray out" or fade as the animal ages."''roan'', ''a''. and ''n.1''" Oxford English Dictionary. 2nd edition 1989. OED Online. Oxford University Press. 3 June 2008. . There are a variety of genetic conditions which produce the colors described as "roan" in various species. Roan horses A horse with intermixed white and colored hairs of any color is usually called a roan. However, such mixtures, which can appear superficially similar, are caused by a number of separate Introduction to genetics, genetic factors. Identifiable types of roans include true or classic roan (horse), roan, varnish roan, and rabicano, though other currently unknown factors may be responsible for ambiguous "roaning." Gray (horse), Gray horses, which become lighter as they age until their hair c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polled (livestock)
Polled livestock are livestock without horns in species which are normally horned. The term refers to both breeds and strains that are naturally polled through selective breeding and also to naturally horned animals that have been disbudded. Natural polling occurs in cattle, yaks, water buffalo, and goats, and in these animals it affects both sexes equally; in sheep, by contrast, both sexes may be horned, both polled, or only the females polled. The history of breeding polled livestock starts about 6000 years BC. Terminology The archaic term or is sometimes used to refer to hornless livestock (especially cattle) in folk songs, folk tales, and poetry, and in the name of the polled Irish Moiled cattle breed. "Muley" derives from Irish and Scottish Gaelic ''maol'', and Welsh ''moel''. Genetics In cattle, the polled allele is genetically dominant to that for horns. The polled trait is far more common in beef breeds than in dairy breeds. CRISPR technology is being develope ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hybrid (biology)
In biology, a hybrid is the offspring resulting from combining the qualities of two organisms of different varieties, subspecies, species or genera through sexual reproduction. Generally, it means that each cell has genetic material from two different organisms, whereas an individual where some cells are derived from a different organism is called a chimera. Hybrids are not always intermediates between their parents such as in blending inheritance (a now discredited theory in modern genetics by particulate inheritance), but can show hybrid vigor, sometimes growing larger or taller than either parent. The concept of a hybrid is interpreted differently in animal and plant breeding, where there is interest in the individual parentage. In genetics, attention is focused on the numbers of chromosomes. In taxonomy, a key question is how closely related the parent species are. Species are reproductively isolated by strong barriers to hybridization, which include genetic and morph ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Roan (color)
Roan is a coat color found in many animals, including horses, cattle, Roan_antelope, antelope, Lykoi, cats and dogs. It is defined generally as an even mixture of white and pigmented hairs that do not Gray (horse), "gray out" or fade as the animal ages."''roan'', ''a''. and ''n.1''" Oxford English Dictionary. 2nd edition 1989. OED Online. Oxford University Press. 3 June 2008. . There are a variety of genetic conditions which produce the colors described as "roan" in various species. Roan horses A horse with intermixed white and colored hairs of any color is usually called a roan. However, such mixtures, which can appear superficially similar, are caused by a number of separate Introduction to genetics, genetic factors. Identifiable types of roans include true or classic roan (horse), roan, varnish roan, and rabicano, though other currently unknown factors may be responsible for ambiguous "roaning." Gray (horse), Gray horses, which become lighter as they age until their hair c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cross-breeding
A crossbreed is an organism with purebred parents of two different breeds, varieties, or populations. A domestic animal of unknown ancestry, where the breed status of only one parent or grandparent is known, may also be called a crossbreed though the term "mixed breed" is technically more accurate. Outcrossing is 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. In animal breeding, ''crossbreeds'' are crosses within a single species, while '' hybrids'' are crosses between different species. In plant breeding terminology, the term ''crossbreed'' is uncommon, and no universal term is used to distinguish hybridization or crossing within a population from those between populations, or even those between species. Crossbreeding is the process of breeding such an organism. It can be beneficially used to maintain health and viability of organisms. However, irresponsible crossbree ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Galloway (cattle)
The Galloway is a Scottish breed of beef cattle, named after the Galloway region of Scotland, where it originated during the seventeenth century. It is usually black, is of average size, is naturally polled and has a thick coat suitable for the harsh climate of Scotland. It is reared mainly for beef. In 2022 the Galloway was reported by twenty-three countries. The worldwide population stood at about head, of which the majority were in Northern Europe, with the largest populations in Denmark and Germany. Etymology The word 'Galloway' derives from the name of a people, the , meaning 'Scandinavian Gaels'. History Polled black cattle were known in Scotland by the sixteenth century at the latest; one is mentioned in an instrument of sasine dated 1523. The Galloway breed comes from the cattle native to the south-west region of Scotland, first fully developed in the seventeenth century. Originally, there was much variation within this breed, including many different colou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shorthorn
The Shorthorn breed of cattle originated in the North East of England in the late eighteenth century. The breed was developed as dual-purpose, suitable for both dairy and beef production; however, certain blood lines within the breed always emphasised one quality or the other. Over time, these different lines diverged, and by the second half of the twentieth century, two separate breeds had developed – the Beef Shorthorn, and the Milking Shorthorn. All Shorthorn cattle are coloured red, white, or roan, although roan cattle are preferred by some, and completely white animals are not common. However, one type of Shorthorn has been bred to be consistently white – the Whitebred Shorthorn, which was developed to cross with black Galloway cattle to produce a popular blue roan crossbreed, the Blue Grey. History The breed developed from Teeswater and Durham cattle found originally in the North East of England. In the late eighteenth century, the Colling brothers, Charles a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Whitebred Shorthorn
Whitebred Shorthorn is a British type of beef cattle originating in north west England and south west Scotland. It is derived from Shorthorn cattle, but is always white, rather than being the range of colours found in other Shorthorns. It has not undergone the specialisation seen in other Shorthorns ( Beef Shorthorn and Dairy Shorthorn), and so it remains as a more traditional hardy and thrifty cattle type. This favours its use for conservation grazing of hill pastures, grazing rank grass species to maintain a diverse flora. Uses The Whitebred Shorthorn was developed to provide white Shorthorn bulls for crossing with black Galloway cows. The offspring of this cross form a popular type, the Blue Grey, which has useful characteristics of both parents, and an intermediate blue roan colour. As this colour does not consistently breed true, Blue Greys are normally produced each generation from the parent breeds. Breed history While the exact origin is unknown the breed came to b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Conservation Grazing
Conservation grazing or targeted grazing is the use of semi- feral or domesticated grazing livestock to maintain and increase the biodiversity of natural or semi-natural grasslands, heathlands, wood pasture, wetlands and many other habitats. Conservation Grazing Peninsula Open Space Trust, California, US, 2009. (cited 2009 Mar 11)What is Conservation Grazing? Grazing Advice Partnership, UK, 2009. Conservation grazing is generally less intensive than practices such as [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Yorkshire Dales
The Yorkshire Dales are a series of valleys, or Dale (landform), dales, in the Pennines, an Highland, upland range in England. They are mostly located in the Ceremonial counties of England, ceremonial county of North Yorkshire, but extend into Cumbria and Lancashire; they are entirely within the Historic counties of England, historic boundaries of Yorkshire. The majority of the dales are within the Yorkshire Dales National Park, created in 1954. The exception is the area around Nidderdale, which forms the separate Nidderdale AONB, Nidderdale Area of Outstanding Natural Beauty. The landscape of the Yorkshire Dales consists of sheltered glacial valleys separated by exposed moorland. The predominant rock is Carboniferous Limestone, which is particularly visible in the south-west in features such as Malham Cove. It is overlain in many areas by the Yoredale Series of alternating weak shales and hard limestones and sandstones, which give the dales their characteristic 'stepped' appeara ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Limestone
Limestone is a type of carbonate rock, carbonate sedimentary rock which is the main source of the material Lime (material), lime. It is composed mostly of the minerals calcite and aragonite, which are different Polymorphism (materials science), crystal forms of calcium carbonate . Limestone forms when these minerals Precipitation (chemistry), precipitate out of water containing dissolved calcium. This can take place through both biological and nonbiological processes, though biological processes, such as the accumulation of corals and shells in the sea, have likely been more important for the last 540 million years. Limestone often contains fossils which provide scientists with information on ancient environments and on the evolution of life. About 20% to 25% of sedimentary rock is carbonate rock, and most of this is limestone. The remaining carbonate rock is mostly Dolomite (rock), dolomite, a closely related rock, which contains a high percentage of the mineral Dolomite (mine ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
