Abstract: To study the flag leaf stomatal characters, photosynthetic characters and their relationship, a F₁₀ recombinant inbred lines(RILs)including 202 lines derived from a cross between a typical indica rice Qishanzhan and a typical japonica rice Akihikari were used as materials.The results were as follows：the stomatal density of Qishanzhan was significantly higher than that of Akihikari；it showed a nearing continuous normal distribution in RILs population；the peak number was close to the mid—parent value, and transgressive segregation was identified.The lines was classified according to Cheng 7S index.the stomatal density expressed as partial Japonica-type>partial indica— type>indica—type>japonica—type.The difference between japonica and indica, partial indica and partial japonica reached a very significant level, respectively.But the difference between indica and partial indica and partial ja— ponica did not reached a significant level.The correlation between the stomatal density and size and photosynthesis characteristics did not meet the significant level.overall, the stomatal conductance showed a high positive correlation with photosynthesis rate and transpiration rate.However, it remains to be further study on the relationship between stomatal conductance and photosynthesis rate of different types, and the main factors affect stomatal conductance.

Key words: Rice, Filial generation, Recombinant inbred lines, Stomatal characteristics, Photosynthesis characteristics

CLC Number: 

• S511.2