吉林省玉米审定品种抗性分析及抗逆育种方向选择

2006～2009年间吉林省通过审定的玉米品种有203个,对审定品种的抗性鉴定结果进行分析,比较吉林省审定品种的抗性水平变化。结果表明,吉林省通过审定的品种在抗性方面大多属于综合中抗水平,在审定品种对所有病虫害的抗性鉴定结果中,对玉米大斑病、玉米茎腐病和玉米螟的抗性审定严格控制,对吉林省区域性发生且危害小的玉米弯孢菌叶斑病和能够通过种衣剂防控的玉米丝黑穗病要求相对降低。抗源筛选和分子辅助育种是现代抗逆育种的基础条件,耐密抗倒伏成为现代育种的重要指标。

Selection of Corn Breeding Direction in the Future and Resistance Analysis Through Examination and Approval of Corn Cultivars in Jilin Province

From 2006 to 2009, two hundreds and three new corn cultivars were identified in Jilin province. It showed that most are mid-resistant level of all the identified new corn cultivars according to the analysis of evaluation of resistance to corn diseases and Asia corn borer. For the result of identified new corn cultivars evaluation of resistance, it required strict to northern corn leaf blight, corn stalk rot and Asia corn borer, but comparatively speaking, it required low to Curvularia lunata occurrence in territory-based and Sphacelotheca reiliana controlled by seed coatings. So, the screening of resistance sources and the molecular assisted breeding are the basic conditions for modern resistance breeding. And the dense-tolerant and lodging resistance traits are very important index properties.