Study On Growth Difference And Preliminary Selection Of Phoebe Provenance Family

Phoebe bournei(Hemsl.)Yang is a rare and endangered species of endangered species in China,with high economic value.Due to the slow growth rate,long growth cycle and young seedlings,the artificial construction technology is difficult to grasp,and the development of the plantation resources is slow at present.It is an important way to effectively solve the cultivation of Phoebe and Phoebe.The research and preliminary selection of phoebebournei provenance families growth differences in intrinsic genetic variation can recognize and understand phoebebournei provenance families,foster the ideal material,in the process of genetic improvement in promoting the development of theory and technology in the future,convenient popularization phoebebournei seed planting.This project carried out the experiment of Phoebe provenance family,investigated and analyzed the growth characteristics of Phoebe nanmu,and studied its growth characteristics and correlation.It is screened from the level of the provenance family.At the same time,the correlation analysis of physiological and biochemical indexes in the selection of seed family was provided to provide the relevant basis for the screening work of Nanxiang source family.The main conclusions are as follows:1.The three testing various family of fujian nan provenance of tree height,DBH and volume there is a certain degree of growth difference,and according to the analysis of variance of different provenance fujian NanShu height,DBH and volume were extremely significant or significant differences,show that differences between across a variety of sources,potential of provenance selection is great.Nanping forestry testbed xiqin teaching performance good provenance is NP,JO,wing on state-owned forest farms testbed performance good provenance is YP,NP,JO,yong Lin company JiFeng work area testbed performance good provenance is SM,JX,NP.The P value of the interaction between the experimental sites of minnan in the height of the tree and the diameter of the chest was 0.041,0.012 and 0.031 respectively.Provenance and the interaction between the testbed were significant(P<0.05),shows the same provenance in growth performance was significantly different under different site conditions,a variety of sources and a significant interaction effect between locations.Genetic variation and genetic stability analysis:in nanping xiqin teaching forest farm of fujian nan of tree height,DBH and volume of the heritability were 0.9463,0.9216,0.9324,and explain the forest nanping xiqin family genetic force control has been the biggest influence on.2.Further in the three experiment to choose the excellent family,practical genetic gain of up to 25%of the volume of selected families as the goal,11 families from Nanping xiqin teaching forest farm,the largest volume of practical genetic gain reached 149.87%;the genetic gain of the state-owned forest in Yongan is 15 volume biggest real number is 52.91%;Yonglin company Jifeng area volume the biggest practical genetic gain was 62 to 83.91%.In order to avoid considering a single character in the selection of excellent limitations in the line,according to the comprehensive analysis of selected traits induction rate was 20%,the Nanping xiqin fine family teaching forest farm were 11,12,7,10,66,15,4,13,16;excellent family for the state-owned forest farm of Yongan 15,10,6,11,14,16,70,46,44;Yonglin company Jifeng area of superior families were 62,5,23,28,3,50,10,24.Further selection of superior individual,25 strains of good plant in three experiments,the volume real genetic gain they were between 61.15%-226.83%,which is the best performance of Nanping xiqin Forest District No.11.3.Three testbed for each family physiological experiment of fujian nan provenance analysis of chlorophyll relative content is higher,the photosynthetic efficiency good family and choose according to comprehensive analysis on several characters out of the good family.It suggests that physiological indicators also promote growth indicators.The overall level of three test families see higher POD activity protection Yonglin company Jifeng area,family with strong resistance phoebe bournei.The overall CAT protective enzyme activity of all the families in Yongan's state-owned forest farms is high,and has a strong resistance to drought and salt tolerance,which can help the family to prevent and delay aging.The whole family phoebe bournei Nanping xiqin teaching forest farm SOD content is relatively stable,can resist stress,have strong resistance to drought.Nanping xiqin teaching center of Phoebe bournei family overall MDA levels are low,with good family phoebebournei cold resistance.The differences between different sources and growth periods of minnan can lead to differences in the physiological differences of resistance and the sensitivity to stress.Physiological indexes on the performance of good family and comprehensive analysis on several characters to choose a good family,illustrates the changes of physiological indexes of enzyme activity and conducive to the growth of fujian nan indicators of growth,affect the performance of growth traits.4.Through principal component analysis,cluster analysis,Nanping Phoebe boumeifast-growing and photosynthetic ability of the 4,5,6,7,10,11,12,15,66 family;Yongan state owned forest farm of fast-growing and photosynthetic ability of 1,3,6,10,11,13,21,32,44,61,70 family;Yonglin company Jifeng area fast-growing and the photosynthetic capacity ofthe strongest is 62,followed by 2631,32,39,40,41,51,52,56,57,58,65,68 pedigrees.