Abstract:

In order to compare the physiological and biochemical characteristics among new varieties, ‘Aikang58’ and ‘Zhoumai18’ as the experimental materials, physiological and biochemical characteristics including photosynthetic characteristics, protein content, soluble sugar content, SOD activity, plant height and the thousand-grain weight were compared. The results indicated that, at filling period net photosynthetic rate of ‘Aikang58’ was 3.4% lower than ‘Zhoumai18’, while SOD activity and soluble sugar content of that were higher respectively by 24.1% and 15.2%. It also showed that protein content of ‘Zhoumai18’ was higher than ‘Aikang58’ by 17.6% at booting stages and 21.4% higher at filling period. But protein content was negatively correlated with yield. When mature period, plant height of ‘Aikang58’ was lower than ‘Zhoumai18’ by 1.9%, and grain weight was 1.1% higher. It should be concluded that ‘Aikang58’ had characteristics of higher yield and greater lodging resistance.