| Acer Aceraceae deciduous trees,Chinese endemic species,widely planted in the northeast,north and other regions.The A.Aceraceae is a set of green,material,oil,tanning,medicinal,etc.As a resistant tree species,A.Aceraceae plays an important role in economic field.This study is based on 11 half-sub families and CK A.Aceraceae trees,planted in different three experimental sites as materials.The main method this study was taken a completely radomized block experiment design.The trees were tasted in 5 replicates,6 cells pre community and to study the growth traits and leaf mineral elements and nutrient contents of the s half-subfamilies.The result of this research are as follows:1.The results showed that there were significant differences in the growth indexes of Yuanbaofeng half-sib family,and the positive correlation was found in each index.For the growth index of Yuanbaofeng,the selection of tree height,DBH and crown were excellent Family.The coefficient of variation of DBH was 24.91% ~ 41.58%,among which the variation coefficient of family One was the largest and the variation coefficient of family 2 was the smallest.The coefficient of variation of tree height varied from 18.60% to 23.56%.The variation coefficient of family 1 was the largest,The variation coefficient of the crown was the smallest,and the coefficient of variation of the crown was in the range of 10.37% ~ 18.05%.The variation coefficient of the family 1 was the largest and the coefficient of variation of the family 2 was the smallest.The growth indexes of A.Aceraceae half-sub families had a certain degree of variation,and each index showed a very significant positive correlation.For the growth index of A.Aceraceae,the selection of family could be achieved at the same time.From the heritability of the pedigree,the heritability of the crowns of the half-sub families was 0.6795,which shows a better genetic control.The heritability of the DBH was 0.4132,which shows a middle genetic control.The heritability of the tree was 0.3235,which shows a low level of control.The heritability of tree height,DBH and crown height were 0.1375,0.2269 and 0.4615,respectively.In addition,the crown height was lower than that of medium intensity inheritance control,and the DBH and tree height were lower in the 11 families.Such as the degree of genetic control,from the perspective of genetic improvement of DBH and tree height family selection of breeding effect is small.2.The selection of the half-sub families of YA.Aceraceae was established by the comprehensive index selection method.The selection equation: I=14.8485x1+4.4365x2+24.3150x3 was established.According to 20% of the selected families,No.11 and No.2 were selected as the best family.The genetic gain of No.11 DBH,height and crown width were 1.07%,0.13% and 6.37% respectively.The second family was No.2,and its DBH,height and crown were the highest in the two families.The genetic gain was 1.91%,0.15% and 2.92%,respectively.3.Eleven Acer truncatum families in three different sites Wulijing,Licheng No.1 and Licheng No.2 as materials and tree height(H),diameter at breath height(DBH)of half past five years old A.truncatum families were investigated to calculate the variance parameters and build diameter at breast height(DBH)-height relationship.The result showed that there exit significant difference(P < 0.01)among sites,families and the interaction of site with family in traits H and DBH.The coefficient variation of phenotype(PCV)of H and DBH ranged from 32.41% to 34.58% and 18.64% to 21.97%,respectively.Ten height-diameter equations base on measured height and diameter data were developed for DBH–height relationship,the most suitable model of three locations and all survey data were set up.The repeatability(R2)of all the model were abrove 0.8 which indicated a high repeatability values.The root mean square error(RMSE)were from 0.052 to 0.310 which showed a perfect imitative effect.The optimal models were verified to base on the independent sample data,the average error of model was very small,and the prediction accuracy reached more than 90%,so these models can be used to describe the change rule of the tree height,and provide the theoretical basis for A.truncatum resource survey,A.truncatum pedigree breeding and stand growth and yield in the region.4.The variation coefficient of mineral elements and nutrient composition index of the ingot leaves showed that the variation range of nitrogen element was 14.30% ~ 33.53%,the variation range of phosphorus element was 14.30% ~ 33.53% phosphorus element,the variation range of potassium element was 13.38% ~ 26.88%,the variation range of sodium element is 3.09% ~ 17.57%,the variation range of zinc element is 13.38% ~ 26.18%,the variation range of calcium element is 14.80% ~ 18.81%,the variation range of magnesium element is 11.42% ~ 20.41 %,The variation range of iron element is 31.29% ~ 38.61%,the variation range of copper element is 11.46% ~ 24.33%,the variation range of manganese element is 39.74% ~ 43.13%,the variation range of protein is 14.30% ~ 35.74% The variation range of free amino acid was 15.49% ~ 35.73%,and the variation range of soluble reducing sugar was 31.29 ~ 50.32%.The variation coefficient of sodium element in the variation coefficient of each component index of ingot leaf element had an average coefficient of variation of 15.41% and the coefficient of variation of soluble reducing sugar was 40.87% on average.It was presumed that the soluble reducing sugar had a greater improvement potential.As the results of the calculation showed that most of the leaf elements were more than one heritability,and the leaf composition index was more,the principal component analysis method was used to select the fine family based on the leaf composition index.The family of the various indicators into the main component analysis in the top 20% of the family selected as the standard,the selection of the top two families ranked excellent family,namely family 3 and family 9. |
PDF Full Text Request