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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 Canid hybrid ： ウィキペディア英語版 Canid hybrid Canid hybrids are the result of interbreeding between different species of the canine (dog) family (Canidae). They often occur in the wild, in particular between domestic or feral dogs and wild native canid.〔(Review of articles on Dog hybridisation in the wild )〕 ==Genetic considerations== Members of the dog genus ''Canis'': gray wolves, domestic dogs, dingoes, Ethiopian wolves, coyotes, and golden jackals cannot interbreed with members of the wider dog family: the Canidae, such as South American canids, foxes, African wild dogs, bat-eared foxes or raccoon dogs; or, if they could, their offspring would be infertile. Members of the genus ''Canis'' can, however, all interbreed to produce fertile offspring, with two exceptions: the side-striped jackal and black-backed jackal. Although these two theoretically could interbreed with each other to produce fertile offspring, it appears they cannot hybridize successfully with the rest of the genus ''Canis''. When the differences in number and arrangement of chromosomes is too great, hybridization becomes less and less likely. The wolf, dingo, dog, coyote, and golden jackal diverged relatively recently, around three to four million years ago, and all have 78 chromosomes arranged in 39 pairs. This allows them to hybridize freely (barring size or behavioral constraints) and produce fertile offspring. The side-striped jackal and black-backed jackal both have 74 chromosomes. Other members of the Canidae family, which diverged seven to ten million years ago, are less closely related to and cannot hybridize with the wolf-like canids;〔 the red fox has 34 metacentric chromosomes and from 0 to 8 small B chromosomes,〔http://cbsu.tc.cornell.edu/ccgr/behaviour/Fox_Genome.htm〕 the raccoon dog has 42 chromosomes, the fennec fox has 64 chromosomes. The African wild dog, however, still has the same number, 78 chromosomes, as do the wolf-like canids but it has yet to hybridize with any of them. 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「Canid hybrid」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.