玉米植株生长发育性状与茎腐病的关系

THE RELATIONSHIP BETWEEN GROWTH CHARACTERS AND STALK ROT IN CORN

摘要:

在1987～1988年两年试验中, 明确了10个杂交种在不同生育期的植株干重, 叶面积和低茎节密度等方面的差异, 以及与茎腐病之间的关系。在营养生长阶段, 抗、感品种之间在叶片大小、色泽和植株干重等方面均无显著差异。在生育后期的植株干重、叶面积和低茎节密度与茎腐病发病率之间均存在着显著的负相关; 各品种间在上述3个性状方面表现出明显的差异。抗病品种的特征一般为叶面积较大、植株干物质积累多, 低茎节密度偏高。

Abstract:

The experiment vesults (from 1987 to 1988), showed the difference in plant dry weight, leaf areas and density of lower internods among 10 hybrids at different growth stages and the relation of the three growth characters to stalk rot. At the stage of vegetative growth, there are no significant difference between a resistant variety and a susceptible variety in leaf areas and colour, dry weight of plant etc.. but, there were significant negative interrelation between one of the three characters and the percentage of stalk rot in the period of reproducteiv growth, The significant difference in leaf areas, plant dry weight and denisity of lower internodes were showed in 10 hybride. These proved that resistant hybrid should generally have larger leaf areas, much more plant dry weight and higher denisity of lower internides in the stage of reProductive growth.