论文部分内容阅读
应用西北农业大学创建的棉枯萎抗性定向培育法，使所有供试感病高产优质品种经人工病床病圃的病原菌持续压力，严格淘汰与系统定向选择，抗性逐年提高，经３～５年即可转化成为高抗品种，这是寄主的遗传免疫功能对生存环境的适应，所产生的定向性渐进变异，和后天获得抗性遗传累加作用的显示。获得高抗性后，原品种丰产性和品质也有改善，从而抗性与精良农艺性状并存，不存在抗性丰产与品质间的必然遗传反相关关系。经２０年努力，已应用此法育成高抗良种和材料３０余个。
The application of cotton wilt resistant directional cultivation method established by Northwestern Agricultural University made all the pathogenic bacteria with high yield and susceptibility to high susceptibility to disease and disease in hospitalized sickbeds continued to be pressured out and strictly eliminated and systematically selected. The resistance increased year by year. After 3 to 5 years Can be transformed into highly resistant varieties, which is the host immune response to adapt to the living environment, the resulting gradual variation of orientation, and acquired genetic accumulation of resistance showed. After obtaining high resistance, the yield and quality of the original varieties also improved, so that both the resistance and the fine agronomic traits coexist, and there is no necessary genetic anti-correlation between the resistant high yield and the quality. After 20 years of hard work, this method has been applied as a high resistance to more than 30 varieties and materials.