光皮树优株遗传多样性研究

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1、硕士学位论文ABSTRACTSwidawilsonianaisakindofwildspecieswoodyoilplantwhichtheoilcanbeproducedbiodiesel．ItismainlydistributedfromtheyellowriverbasintothehilllandsofSouthwestareas．Althoughmanyresearchershaddonemuchmoreresearch011Swidawilsoniana,therestillwasn

2、oreportaboutthegeneticdiversityappraisaloftheplustreesofSwidawilsonianainnaturaldistributionregion．Geneticdiversityisbaseofvariationofthespecies，whilethevariationembodiesthegeneticdiversityofthespecies．Furthermore，itisnecessarytoappraisetheplustreeso

3、fSwidawilsonianabythemethodsofgeneticdiversityanalysisforselectinghigh—productionplustrees．Bytheresearchofmorphologyandallozyme，wedrewaconclusion：1、T1lispaperfirstlycombinedclassicalmorphologicalmarkerswitllenzymemarkstoresearchanddisscusstheheredity

4、multiplicityandheredityroleofplusstreesofSwidawilsoniana．Meanwhile,theresearchedresultsconstructedandformedtllemethodofobservatingandrecordingoftheimportanthereditaryfeature，theevaluationcriteriaandthequantitativehereditymodelofSwidawilsoniana．2、Base

5、d011theresultsofforwardselection，firstsortingandcheck，whichhaddonebyotherresearchersin1997-2001，thispaperanalyzedtheoriginaldataandassessed16superiorisolatesforpropagation．TheyareDA7、DA46、XT33、JY21、QD27、XE56、L$21、YDl7、YD83、SC22、LNl、LN7、LN39、HF8、XE21a

6、nd儿65．3、Thepaperfirstlyappliedmorphologicalmethodtoanalyze25morphologicaltraitsoftheplustreesofSwidawilsoniana,andfoundthatthegeneticvariationwasveryabundantbetweentheplustrees．Inthemorphologicaltraits，thegeneticvailationofeffectivenumberofbrancheswa

7、s81．70％andwasuptothehighestvalueamongtheallrecordedmorphologicaltraits．Meanwhile，thereweredifferent-degreegeneticvariationinothermorphologicaltraits，suchastreeheight,heightofculm，degreeofdensityofbranch，bladelength，fruittransversediameter,fruitlongit

8、udinaldiameteretC．ThediversityindexisanimportantgeneticindexwhichCandescribethevariablescope．Theaveragevalueofdiversityindexbetweentheplusfleeswas1．587，anditindicatedtherewasmuchgeneticHIJ光皮树优株遗传多样性研究diversitybetweentreesthatcamefromdifferentareas．At