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Net photosynthetic rate, leaf area, tillering, shoot weight,and leaf area ratio for 35 F1 rice (Oryza sativa L.) hybridsduring the vegetative stage were compared with correspondingvalues for parental varieties. Shoot weight and leaf area showedheterosis. However, hybrid vigour was not reflected in net photosyntheticrate. Leaf area was closely correlated with heteroses in shootdry weight and tillering. Thus F1 rice hybrids grow vigorouslybecause of their high leaf area development, which is causedby high tillering. Key words: F1 rice hybrid, Net photosynthetic rate, Leaf area 相似文献
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