Analysis And Heredity Research Of Relative Traits Of High Energy Stem In Maize

: As a kind of bio-energy, it is very necessary for inaugurating new energy ,reducing environment pollution ,protecting entironment and enhancing integrated economy benefit to research into energy index and genetic law of the stem of maize and filtrate and breed maize variety of high calorific value. The knowledge of the energy index and genetic law can contribute to exploiting and utilizing renewable energy and making up for lack of energy and researching into burning genetic law of maize abroad and home. The objectives of this study were to confirm energy index and their genetic law. Two field experiments were conducted in this study. 15 varieties that have been generalized in my province and 22 inbred lines were planted according to arbitrary rank. The other field experiment was consisted of 42 hybrids that were crossed by 6 female parents and 7 male parents in NCII design and 13 inbred lines. The field experiments were arranged in Henan Agricultural University Technology Farm. The chemic component and calorific value of maize stein were analyzed and related agronomic traits and grain yields were surveyed for filtrating maize varieties of high energy and confirming energy index and researching genetic law. The results indicated as the following: the total calorific value of stem is positively and significantly correlated with yield of stem ; The calorific value , hemicellulose content, cellulose content and lignin content were different in different material and different part of same material; calorific value ,cellulose content and lignin content from the upper to the lower increased gradually, but hemicellulose content decreased gradually in same material; there is distinct heterosis in 4 traits of different material, The calorific value has consanguineous correlation and regression with cellulose content and lignin content, the regression equation of experiment material one is Y=10523+13273x1+15908x2, the regression equation of other experiment material is Y=10392+8154x1+26789x2; cellulose and lignin are confirmed the main energy indexes of stem. With the results of calorific value and yield characters, Yuyu25, Shendan16, Nongda108 and Yuyu34 are ideal varieties with the characters of high calorific value and high yield, which they can be popularized in production. Q319×Ch7, Shen137×Yc are bred promising hybrids with high calorific value and high yield. The analysis of combining ability showed: GCA and SCA both attain very prominent level, The parents' additive variation didn't lead to main function while nonadditive variation was greater for 4 tracts of F1. The hN2 was ordered from high to low as cellulose content, calorific value, lignin content, and hemicellulose content. The ΔG? was ordered from high to low as cellulose content, lignin content, calorific value and hemicellulose content. The analysis of GCA indicated as following: the GCA of X178 and Ye52106 was high in calorific value, cellulose content and lignin content and was low in hemicellulose content; The GCA of Shen137 was high in calorific value and lignin content and was middle level in cellulose content and was low in hemicellulose content. The analysis of SCA showed: The SCA of Shen137×Yc, Q319×Ch7 was high in calorific value, cellulose content and lignin content, they had strong heterosis and were promising to further breed new variety of high calorific value high yield and good quality.