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Poll Merino
The Poll Merino is a subtype of the Australian Merino breed of domestic sheep, without horns, that was developed in Australia. Characteristics These sheep are early maturing, large framed and relatively plain bodied, producing a fleece which is soft handling and of good colour thus retaining the attributes of the Merino. Polled Merinos are now found in the various strains of Merinos.Stephens, M (''et al.''), ''Handbook of Australian Livestock'', Australian Meat & Livestock Export Corporation, 2000 (4th ed.), A single gene with three possible alleles controls horn inheritance in Australian Merinos. Poll Merino rams are not susceptible to poll strike (maggots behind the horns) which results from fighting and which can cause temporary infertility. They are also easier to crutch and shear, are less likely to become caught in fences or bushes and they are generally easier to handle.Cottle, David J., Australian Sheep and Wool Handbook, Inkata Press, Melbourne, 1991, The wethers do ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Poll Merino
The Poll Merino is a subtype of the Australian Merino breed of domestic sheep, without horns, that was developed in Australia. Characteristics These sheep are early maturing, large framed and relatively plain bodied, producing a fleece which is soft handling and of good colour thus retaining the attributes of the Merino. Polled Merinos are now found in the various strains of Merinos.Stephens, M (''et al.''), ''Handbook of Australian Livestock'', Australian Meat & Livestock Export Corporation, 2000 (4th ed.), A single gene with three possible alleles controls horn inheritance in Australian Merinos. Poll Merino rams are not susceptible to poll strike (maggots behind the horns) which results from fighting and which can cause temporary infertility. They are also easier to crutch and shear, are less likely to become caught in fences or bushes and they are generally easier to handle.Cottle, David J., Australian Sheep and Wool Handbook, Inkata Press, Melbourne, 1991, The wethers do ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Australia
Australia, officially the Commonwealth of Australia, is a Sovereign state, sovereign country comprising the mainland of the Australia (continent), Australian continent, the island of Tasmania, and numerous List of islands of Australia, smaller islands. With an area of , Australia is the largest country by area in Oceania and the world's List of countries and dependencies by area, sixth-largest country. Australia is the oldest, flattest, and driest inhabited continent, with the least fertile soils. It is a Megadiverse countries, megadiverse country, and its size gives it a wide variety of landscapes and climates, with Deserts of Australia, deserts in the centre, tropical Forests of Australia, rainforests in the north-east, and List of mountains in Australia, mountain ranges in the south-east. The ancestors of Aboriginal Australians began arriving from south east Asia approximately Early human migrations#Nearby Oceania, 65,000 years ago, during the Last Glacial Period, last i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Merino
The Merino is a breed or group of breeds of domestic sheep, characterised by very fine soft wool. It was established in Spain near the end of the Middle Ages, and was for several centuries kept as a strict Spanish monopoly; exports of the breed were not allowed, and those who tried risked the death penalty. During the eighteenth century, flocks were sent to the courts of a number of European countries, including France (where they developed into the Rambouillet), Hungary, the Netherlands, Prussia, Saxony, Estonia, Livonia and Sweden. The Merino subsequently spread to many parts of the world, including South Africa, Australia, and New Zealand. Numerous recognised breeds, strains and variants have developed from the original type; these include, among others, the American Merino and Delaine Merino in the Americas, the Australian Merino, Booroola Merino and Peppin Merino in Oceania, the Gentile di Puglia, Merinolandschaf and Rambouillet in Europe. The Australian Poll Merino is a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Domestic Sheep
Sheep or domestic sheep (''Ovis aries'') are domesticated, ruminant mammals typically kept as livestock. Although the term ''sheep'' can apply to other species in the genus ''Ovis'', in everyday usage it almost always refers to domesticated sheep. Like all ruminants, sheep are members of the order (biology), order Artiodactyla, the even-toed ungulates. Numbering a little over one billion, domestic sheep are also the most numerous species of sheep. An adult female is referred to as a ''ewe'' (), an intact male as a ''ram'', occasionally a ''tup'', a castrated male as a ''wether'', and a young sheep as a ''lamb''. Sheep are most likely descended from the wild mouflon of Europe and Asia, with Iran being a geographic envelope of the domestication center. One of the earliest animals to be domesticated for agricultural purposes, sheep are raised for fleeces, meat (lamb, hogget or mutton) and sheep milk, milk. A sheep's wool is the most widely used animal fiber, and is usually harvest ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Horn (anatomy)
A horn is a permanent pointed projection on the head of various animals that consists of a covering of keratin and other proteins surrounding a core of live bone. Horns are distinct from antlers, which are not permanent. In mammals, true horns are found mainly among the ruminant artiodactyls, in the families Antilocapridae (pronghorn) and Bovidae (cattle, goats, antelope etc.). Cattle horns arise from subcutaneous connective tissue (under the scalp) and later fuse to the underlying frontal bone. One pair of horns is usual; however, two or more pairs occur in a few wild species and in some domesticated breeds of sheep. Polycerate (multi-horned) sheep breeds include the Hebridean, Icelandic, Jacob, Manx Loaghtan, and the Navajo-Churro. Horns usually have a curved or spiral shape, often with ridges or fluting. In many species, only males have horns. Horns start to grow soon after birth and continue to grow throughout the life of the animal (except in pronghorns, which shed the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gene
In biology, the word gene (from , ; "...Wilhelm Johannsen coined the word gene to describe the Mendelian units of heredity..." meaning ''generation'' or ''birth'' or ''gender'') can have several different meanings. The Mendelian gene is a basic unit of heredity and the molecular gene is a sequence of nucleotides in DNA that is transcribed to produce a functional RNA. There are two types of molecular genes: protein-coding genes and noncoding genes. During gene expression, the DNA is first copied into RNA. The RNA can be directly functional or be the intermediate template for a protein that performs a function. The transmission of genes to an organism's offspring is the basis of the inheritance of phenotypic traits. These genes make up different DNA sequences called genotypes. Genotypes along with environmental and developmental factors determine what the phenotypes will be. Most biological traits are under the influence of polygenes (many different genes) as well as gen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Allele
An allele (, ; ; modern formation from Greek ἄλλος ''állos'', "other") is a variation of the same sequence of nucleotides at the same place on a long DNA molecule, as described in leading textbooks on genetics and evolution. ::"The chromosomal or genomic location of a gene or any other genetic element is called a locus (plural: loci) and alternative DNA sequences at a locus are called alleles." The simplest alleles are single nucleotide polymorphisms (SNP). but they can also be insertions and deletions of up to several thousand base pairs. Popular definitions of 'allele' typically refer only to different alleles within genes. For example, the ABO blood grouping is controlled by the ABO gene, which has six common alleles (variants). In population genetics, nearly every living human's phenotype for the ABO gene is some combination of just these six alleles. Most alleles observed result in little or no change in the function of the gene product it codes for. However, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crutching
Crutching refers to the removal of wool from around the tail and between the rear legs of a sheep for hygiene purposes. It can also refer to removing wool from the heads of sheep (''wigging'' or ''eye-wooling''). It does not refer to the process of mulesinga controversial procedure that involves removing of strips of wool-bearing skin from around the breech (buttocks) of a sheep. Motivation Through centuries of selective breeding, most recently through artificial insemination, domestic sheep have denser and longer wool than their wild forebears, which may require human intervention to maintain. Sheep with heavy fleeces of wool often develop stains or dags on their rear ends from faeces. In ewes, urine can also stain the wool. To avoid discomfort to the sheep and damage to the fleece, graziers remove the wool (and any dags) from the sheep. Urine and watery faeces from eating spring grass can also lead to myiasis (fly-strike), which occurs when flies lay eggs in warm, damp wool ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Moree, New South Wales
Moree is a town in Moree Plains Shire in northern New South Wales, Australia. It is located on the banks of the Mehi River, in the centre of the rich black-soil plains. The town is located at the junction of the Newell Highway and Gwydir Highway and can be reached by daily train and air services from Sydney. The Weraerai and Kamilaroi peoples are the earliest known inhabitants of the area, and the town's name is said to come from an Aboriginal word for "rising sun," "long spring," or "water hole". The town was settled by Europeans in the 1850s, and local Aboriginal residents were placed in missions, later Aboriginal reserves. The town, and in particular the Moree Baths and Swimming Pool, are known for being visited by the group of activists on the famous 1965 Freedom Ride, an historic trip through northern NSW led by Charles Perkins to bring media attention to discrimination against Indigenous Australians. Moree is a major agricultural centre, noted for its part in the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Peppin Merino
The Peppin Merino is a breed of Merino sheep raised for their wool, mostly in Australia. So important is the Peppin Merino that wool producers throughout Australia often classify their sheep simply as being either Peppin, or non-Peppin. Peppin merino wool is in the 20 to 23 micron range. The Peppin is prevalent in the sheep flocks of Queensland, on the slopes and plains of New South Wales, through the north of Victoria and the mixed farming areas of South Australia and Western Australia. It can also be found in significant numbers in the higher rainfall areas of Victoria, Tasmania and New South Wales. History In March 1858, the Peppin brothers, who had emigrated from Old Shute Farm, Dulverton, Somerset in England, purchased Wanganella Station, near Wanganella township in the Riverina district of New South Wales. The Peppins then selected 200 station-bred ewes that thrived under local conditions and purchased 100 Rambouillet-sired stud ewes from Nicholas Chadwick of Canally, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Booroola Merino
The Booroola is a Merino strain that has a high rate of multiple births. Booroola's prolificacy was studied extensively by New Zealand researchers, who provided one of the first examples of the practical application of gene mapping in sheep, by mapping the Booroola gene to chromosome 6 . History The Booroola Merino was started by Jack and Dick Seears of Booroola, Cooma using ewes from their Egelabra flock that gave multiple-births. The Seears gave the CSIRO a quintuplet ram in 1958, another in 1959 and a sextuplet ewe in 1960. In 1958, the CSIRO purchased 12 ewes (triplets or quadruplets) and a ewe who had given birth to triplets. When the Booroola flock was dispersed in 1965, the CSIRO purchased 91 mixed-age multiple-born ewes and moved their Booroola flock from Deniliquin to Armidale. The Egelabra and Mumblebone strains of the Merino can be traced to Gamboola; these were derived from Samuel Marsden's flock, and like Macarther's flock, Marsden's flock was based on South Africa ... [...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 developed t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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