Selection Of Clones And Genetic Variable Of Grafting Clones Of Picea Abies

Picea abies,which is foreign species for timber, has been introduced successfully insome key forest regions of the north of China. It has better development potential than localspecies of Picea and can breeds with cuttage. This paper, which treat grafting clonalexperimental woods of Picea abies as materials, is made systematic research for research dataof Picea and13growing characters of experimental woods and analyses genetic charactersabout growth of clonal of Picea abies using research methods such as field investigation andstatistic analysis (SPSS16.0). It’s aimed to realize the genetic variation characteristics andasexual improved potentials of main economical traits in36clonal of7year-old Picea abiesand discuss the feasibility of choosing excellent clone, as to provide theoretical foundation andgood germplasm for improvement and utilization of Picea abies. It has important theoreticaland applied value for cultivation of Picea abies.The results show that:1）Average preservation rate of grafting clones of Picea abies are32.5~100%. Thepreserved situations of experimental forests become divided, because the differences ofadaptabilities and region otherness between origins and morrow plots of elite trees whichindicates the adaptabilities of grafting clones of Picea abies are different and that of majorityof them are very strong.2）Genetic variable coefficients of each character of Picea abies are8.75~14.08%. Thehereditary variation of growth characters among clones is marked.Relative variance components of each clonal traits (the proportion of variance componentto total variance component) are between4.8~17.6%; that of blocks are between-0.5~1.4%.They imdicate hereditary variation is main variable factor among clones. This is theoreticalbasis of choice of clones.Clonal repetitive powers are40~70%and individual repetitive powers are4.8~17.6%.They indicate improved potential of choice of clones is great and individual plant selection isfeasible. 3）height of scion of that year is genetically relevant with6characters such as basaldiameter of scion, height of scion,4~7year-old height of scion, etc. and basal diameter ofscion is genetically relevant with several characters such as6~7year-old height of scion.There exists genetic relevance of early-later period among4characters such as4~7year-oldheight of scion and so on.They all indicate the character of early stage,4year-old height of scion, can be used tomake growing forecast about later period of height of scion for grafting clones of Picea abies.It can be confirmed4year-old as choice age of early stage and made early choice by traits of4year-old, that could shorten genetic evaluation time.4）Combining2methods of integrated selection index and integrated assessment valuetogether, we selected9prime clones according to selection rate of25%. The traits of theseclones are growing fast and well-adapted.They can be used to popularization anddemonstration. It’s effective improved method of clonal choice and breeding using.It is suggested that cutting orchard could be established by asexual reproduction using the9exellent clonal materials and hybrid seed production can be produced in intraspecific andinter-species as parents to achieve further genetic improved utilization.5）According to observation data of growing law about scion of that year, we found theregression equations about heights of scions of that year and growing days of clones whoseorder of heights of scions belongs to Top5. The regression curve equation of No.19clone,which performed best in growth, is the power function model: lny=ln5.15E-7+4.617lnt(R~2=0.998, Sig.=0.001).