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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Indian aurochs ： ウィキペディア英語版 Indian aurochs The Indian aurochs (''Bos primigenius namadicus'') is a subspecies of the extinct aurochs. It is considered as the ancestor of the zebu cattle, which is mainly found in southern Asia and has been introduced in many other parts of the world, like Africa and South America. In contrast, the taurine cattle breeds, which are native to Europe, the Near East, and other parts of the world, are descendants of the Eurasian aurochs (''Bos primigenuis primigenius''). The Indian aurochs disappeared in the Holocene, probably around 2000 BC. == Description == The Indian aurochs is known from fossil and subfossil remains. These show relatively slight differences to the Eurasian aurochs (''B. p. primigenius'').〔Raphael Pumpelly: ''Explorations in Turkestan : Expedition of 1904'' : vol.2, p. 361〕 The Indian aurochs was probably smaller than its Eurasian counterpart but had proportionally larger horns.〔Cis van Vuure: ''Retracing the Aurochs - History, Morphology and Ecology of an extinct wild Ox.'' 2005, ISBN 954-642-235-5.〕 Because the range of the aurochs probably was continuous from Portugal to India, it is uncertain whether there was a clear distinction or a continuum between the Eurasian and Indian subspecies.〔 The Indian aurochs diverged from the Eurasian aurochs (''B. p. primigenius'') about 100,000 - 200,000 years ago. This has been shown by comparison of DNA from zebus and taurine cattle breeds, the living descendants of these two aurochs forms.〔Verkaar, Nijman, Beeke, Hanekamp & Lenstra: ''Maternal and Paternal Lineages in Cross-breeding bovine species. Has Wisent a Hybrid Origin?.'' 2004.〕 The Indian aurochs is sometimes regarded as a distinct species.〔MacHugh et al., 1997: ''Microsatellite DNA Variation and the Evolution, Domestication and Phylogeography of Taurine and Zebu Cattle (''Bos taurus ''and'' Bos indicus'')''. Genetics, Vol. 146, 1071–1086. (Abstract )〕 Zebu cattle is phenotypically distinguished from taurine cattle by the presence of a prominent shoulder hump.〔Loftus et al., 1994: ''Evidence for two independent domestications of cattle.'' Proceedings of the National Academy of Sciences 91.7: 2757-2761. (Abstract )〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Indian aurochs」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.