二、油料作物大豆:我国是大豆的初生起源中心,野生大豆遍布全国各地,北起黑龙江,南至广东北部,都发现有野生大豆。野生大豆适应性极强,具有抗病、抗虫、耐涝、耐瘠、耐盐等特性,表现出顽强的生活力,这对大豆育种和起源演变研究有很大价值。截止1981年11月,我国已搜集野生大豆5000份,类型极为丰富,叶型有线形、披针形、卵圆形及各种中间形;荚大小、粒大小、叶大小、植株高矮等都具有极大多样性;花色分紫花和白花;蛋白质含 Second, the oil crop Soybean: China is the birthplace of soy origin center, wild soybeans throughout the country, north of Heilongjiang, south of Guangdong in the north, are found in wild soybean. Wild soybean has strong adaptability and resistance, insect resistance, waterlogging resistance, barrenness, salt tolerance and other properties, showing tenacious vitality, which is of great value to soybean breeding and the study of its origin and evolution. As of November 1981, China has collected 5,000 copies of wild soybeans, the type is extremely rich, leaves linear, lanceolate, oval and various intermediate; pod size, grain size, leaf size, plant height, etc. have Great diversity; flower color purple and white flowers; protein containing