黑龙江省农业科学院小麦研究所根据生态育种理论，采用阶梯式复合杂交方式，分阶段地把来自国内外亲本的优良性状进行基因累加，培育出适应性广、丰产、多抗、优质的春小麦品种克丰２号。克丰２号在生产上累计种植２００多万ｈｍ２，以它为亲本育成７个克字号小麦新品种。文中分析其遗传基础、育种策略和经验 According to the theory of ecological breeding, the wheat research institute of Heilongjiang Academy of Agricultural Sciences adopts the stepwise compound hybridization method to genetically accumulate the fine traits from domestic and foreign parents in stages, and to cultivate the varieties of spring wheat with wide adaptability, high yield, multi-resistance and high quality Feng 2. Kefeng 2 in the production of a total of planting more than 200 million hm2, with it as a parent bred 7 grams of new wheat varieties. The article analyzes its genetic basis, breeding strategy and experience