| 摘要: |
| 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。 |
| 关键词: 棉花，枯萎病，抗病性，定向培育 |
| DOI： |
| 分类号:S332.2 |
| 基金项目: |
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| Theory and Practice of Fusarium Wilt-Resistance Cotton Cultivar Breding |
|
Zhang Yunqing
|
| Abstract: |
| The directive Fusarium Wilt-resistance cotton breeding method invented by NWAU was used in this research.By means of successively selective presure with wilt disease in inoculated Fusarium seedling bed and plot,and by using systematic and directive selections,the Fusarium resistance of all tested cotton varieties,which originally had high yield and fine quality characters but was susceptible to Fusarium wilt,increased gradually,and finally became highly resistant ones in 3 to 5 years.These results showed the directively progressive variation of cotton host inherited immunological adaptability of living environment,and the additive effect of acquired resistant heredity.This result indicated that the high resistance and fine agronomic characters could exist togather in one cotton cultivar.Between them there was no inevitablely negetive correlation.In the past 20 years,more than 30 with high yield,fine-quality and high resistant cultivars or germplasme were bred with this method. |
| Key words: cotton,Fusarium wilt,disease resistance,directive breeding |
