《猪的品种》ppt课件

2024-01-12 17:01 本页面

【正文】 3) Characteristics All white body Erect ears 1. Yorkshire Large White Middle White 1. Yorkshire 4) Benefits Maternal breedknown as the “mother breed” Known also as a “Dual purpose breed”  Lean and meaty carcass  Used for crossbreeding American Yorkshire American Yorkshire British Yorkshire 1) Origin Denmark, came to China in early 1980’s 2) Distribution Overall the world 3) Characteristics All white body Long thin ears flopping forward Super lean 2. Landrace Danish Landrace 2. Landrace 4) Benefits Maternal breedknown for mothering Known for length of body One extra rib Danish Landrace American Landrace Dutch Landrace Finnish Landrace French Landrace German Landrace British Landrace 1) Origin New york/New Jersy state, USA, in 1800’s 3. Duroc American Duroc 2) Characteristics red color with considerable variation from light golden, almost yellow color, to a very dark red drooping ear 3) Benefits Known as a “Terminal breed” Grow extremely fast Durable and rugged 3. Duroc Danish Duroc 4. Hampshire 1) Origin： Hampshire ，England 2) Characteristics 1. Black color with a white belt 2. Erect ears 3) Benefits Known as a “terminal breed” The “meat breed” excellent carcass: heavy muscled and lean Used in crossbreeding programs 4. Hampshire 4) Disbenefits poor meat quality: RN gene( Rendement napole gene) (Hampshire gene) 1) Cause an accumulation of glycogen(糖原） in the muscle 2) Decrease the ultimate ph(acid pork) 3) High drip losses（ 滴水损失） 4) Improve average daily gain(ADG) 5) Increase carcass lean meat content 4. Hampshire 1) Origin : Belgium, imported in China in 1980’s 5. Pietrain 5. Pietrain 2) Breed characteristics medium size

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