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A sheep–goat hybrid (sometimes called a geep or shoat in popular media) is the hybrid offspring of a sheep and a goat. Although sheep and goats seem similar and can be mated, they belong to different genera in the subfamily Caprinae of the family Bovidae. Sheep belong to the genus ''Ovis'' and have 54 chromosomes, while goats belong to the genus ''Capra'' and have 60 chromosomes. The offspring of a sheep-goat pairing is generally stillborn. Despite widespread shared pasturing of goats and sheep, hybrids are very rare, indicating the genetic distance between the two species. Though sometimes called "geep",〔http://www.bbc.co.uk/news/world-europe-26870598〕 they are not to be confused with goat-sheep chimerae, which are artificially created. ==Cases== At the Botswana Ministry of Agriculture in 2000, a male sheep impregnated a female goat resulting in a live offspring. This hybrid had 57 chromosomes, intermediate between sheep (54) and goats (60) and was intermediate between the two parent species in type. It had a coarse outer coat, a woolly inner coat, long goat-like legs and a heavy sheep-like body. Although infertile, the hybrid had a very active libido, mounting both ewes and does even when they were not in heat. He was castrated when he was 10 months old, as were the other kids and lambs in the herd.〔http://www.ncbi.nlm.nih.gov/sites/entrez?cmd=Retrieve&db=PubMed&list_uids=10818315&dopt=Abstract Sheep–goat hybrid born under natural conditions. (Ruminant Research. 2000. 37: 1–2 ) - PubMed Result〕 A male sheep impregnated a female goat in New Zealand resulting in a mixed litter of kids and a female sheep-goat hybrid with 57 chromosomes.〔http://www.ncbi.nlm.nih.gov/sites/entrez?cmd=Retrieve&db=PubMed&list_uids=16031565&dopt=Abstract A case of a sheep-goat hybrid in New Zealand. (Zealand Vet. J. 1990 )- PubMed Result〕 The hybrid was subsequently shown to be fertile when mated with a ram.〔http://www.ncbi.nlm.nih.gov/sites/entrez?cmd=Retrieve&db=PubMed&list_uids=2757269&dopt=Abstract Blood genetic marker studies of a sheep-goat hybrid and its back-cross offspring. (Genet. 1989 )〕 In France natural mating of a doe with a ram produced a female hybrid carrying 57 chromosomes. This animal backcrossed in the veterinary college of Nantes to a ram delivered a stillborn and a living male offspring with 54 chromosomes. In California Valley, a geep was born in 2011. It birthed several hybrid babies over a 3-year period, until 2014 when it began to have miscarriages. The geep was then slaughtered for meat because geep meat has its own unique taste compared to sheep or goat meat. The geep and its offspring were the only known examples in California. On May 12, 2011, a healthy and fertile geep was born in Bant, Flevoland, the Netherlands. The geep mated with a ewe and on December 25, 2012 two healthy lambs were born.〔http://www.destentor.nl/regio/noordoostpolder/gaap-krijgt-kindjes-1.3584593〕 In April 2014, the Irish Farmers Journal reported on the birth of an offspring resulting from a goat-sheep cross, on the farm of Paddy Murphy, Ballymore, Co. Kildare. The animal was reported to be healthy and thriving; no chromosomal investigation has occurred yet.〔(【引用サイトリンク】url=http://www.bbc.co.uk/news/world-europe-26870598 )〕 On April 14, 2014, a healthy and active geep was born at Ticonderoga Farms, Chantilly, Virginia, USA. It was rejected by the mother. Also in April 2014, a naturally conceived and healthy geep was born in Burladingen-Starzeln in Zollernalbkreis, Germany.〔(Seltene Kreuzung in Burladingen: Killertaler Schiege ist putzmunter. )(German)〕 On Sunday, July 27, 2014, a geep named Butterfly was born at My Petting Zoo in Scottsdale, AZ.〔The Arizona Republic - http://www.azcentral.com/story/news/local/scottsdale/2014/07/30/12news-butterfly-may-be-arizonas-only-geep/13386699/〕 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「Sheep–goat hybrid」の詳細全文を読む スポンサード リンク
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