论文部分内容阅读
黑龙江省拜泉县玉米种植面积广阔。玉米生产形势直接关系着国计民生,经多年攻关研究,拜泉县玉米抗病育种工作已取得巨大成绩,由于推广了抗大、小斑病及丝黑穗病的玉米新品种或杂交新组合,已使大、小斑病及丝黑穗病等老病害得到了有效控制,然而因目前生产中采用的品种或自交系多为单抗性品种,而且种质遗传基础狭窄,致使玉米茎腐病、灰斑病、弯孢菌叶斑病、纹枯病、病毒病等病害发生愈来愈普遍,为害日益加重,严重制约了玉米生产的发展和提高,已成为植
Baiquan County, Heilongjiang Province, corn planting a vast area. Maize production situation is directly related to the national economy and the people’s livelihood. After many years of research on key issues, great achievements have been made in the breeding of maize in Baiquan County. Due to the promotion of a new maize variety or hybrid combination resistant to large and small spot disease and head smut, So that the big and small spot disease and head smut and other diseases have been effectively controlled, however, because the current production of varieties or inbred lines are mostly monoclonal varieties, and narrow genetic basis of germplasm, resulting in corn stalk rot , Gray spot disease, Curvularia leaf spot, sheath blight, virus diseases and other diseases are more and more common, the damage is aggravating, seriously restricting the development and improvement of corn production, has become a plant