The experiment was carried out to study compatibility and genetic parameters of 10 hybrid and 5 inbrid line.The results showed that additive effect was main factor of genetic variance for total leaf angle and other 6 traits.Both additive effect and nonadditive effect were almost equally important factor for green staying and other 3 traits.The middle Leaf Area Index was mainly influeced by nonadditive effect.Total leaf area index,total leaf angle and total leaf orientation could be estimated by any of the upper,middle or the lower part of leaf area index,leaf angle and leaf oroentation.The upper leaf area index and and total leaf area parameter was significantly positively correlated with yield.