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[48] [55] [56] A landmark 2020 Nature study that fully sequenced 863 chickens across the world suggests that all domestic chickens originate from a single domestication event of red junglefowl whose present-day distribution is predominantly in southwestern China, northern Thailand and Myanmar. These domesticated chickens spread across Southeast ...
[3] [20] [21] A landmark 2020 Nature study that fully sequenced 863 chickens across the world suggests that all domestic chickens originate from a single domestication event of red junglefowl whose present-day distribution is predominantly in southwestern China, northern Thailand and Myanmar. These domesticated chickens spread across Southeast ...
The domestic chicken is descended primarily from the red junglefowl (Gallus gallus) and is scientifically classified as the same species. [6] The traditional poultry farming view, is stated in Encyclopædia Britannica (2007): "Humans first domesticated chickens of Indian origin for the purpose of cockfighting in Asia, Africa, and Europe.
Similarly, a 2020 study that analysed the whole genomes of Sri Lanka junglefowl, grey junglefowl, and green junglefowl found strong introgressive hybridisation events in different populations of indigenous village chickens. [2] The study also shows that 71–79% of red junglefowl DNA is shared with the domestic chicken. [2]
Location of origin Purposes Image Changes from wild ancestor/ Notes Extent in the wild vs. captivity Taxon group Domestic dog (Canis familiaris) [3] Extinct Pleistocene population of the grey wolf (Canis lupus ssp.) [4] 13,000 BCE [5] [6] China, [7] [8] [9] Europe [6] in different places in Asia
Before this, chickens did not thrive during the winter due to lack of sunlight, and egg production, incubation, and meat production in the off-season were all very difficult, making poultry a seasonal and expensive proposition. Year-round production lowered costs, especially for broilers. Artificial daylight supplementation also started being used.
The Dominique is an American breed of chicken, characterized by black-and-white barred plumage and a rose comb. It is considered to be the oldest American chicken breed, [8]: 121 and is thought to derive from birds brought to America by colonists from southern England. It was well known by about 1750, and by the mid-nineteenth century was ...
The Jersey Giant is an American breed of domestic chicken. It was created in Burlington County, New Jersey , in the late nineteenth century. [ 5 ] It is among the heaviest of all chicken breeds.