植 物 育 种 学
内 容 ⚫植物育种学的任务和内容 ⚫植物育种学发展 ⚫品种的概念和作用 ⚫我国植物育种的成就 ⚫如何学习植物育种学？
wheat rice corn potatoes millet &sorghum cassava rye barley all other foods Fig 1. source of food used by the world’s people. Over 50percent of the food supply comes from seven cereal grains, over 40 percent from rice and wheat
现代农作物生产的主要投入要素 Production of food is a problem of major concern in the world today Farm crops To increase farm crop production, four important inputs need major attention: water, fertilizer, pest control, and the crop variety
外因和内因 ⚫ Water relate to providing a ⚫ Fertilizer better environment in ⚫ pest control which to grow the crop Crop variety relates to the inherent ability of the plant to produce within the environment provided