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1、families,forphenotypeandgeneticcorrelationtherewereweakandnon-significantlynegativecorrelationbetweenbasicdensityandfiberlength,andtherewereextremelysignificantlynegativecorrelationwhenbasicdensitycomparedwithfiberwidthandratiooffiberlengthtowidth.Forphenotypeandgeneticcorrelati
2、ontherewereweakandnon-significantlynegativecorrelationbetweenfiberlengthandfiberwidth,andtherewereextremelysignificantpositivecorrelation.Forphenotypeitshowednon-significantlynegativecorrelationbetweenbasicdensityandtreeheight,DBHandVolume.Forphenotypethereweresignificantnegativ
3、ecorrelationbetweenfiberwidthandDBH,fortherestofgrowthcharactersandwoodqualitycharacterstherewasnosignificantcorrelation.5.Undertheselectionrateof10%forsuperiorfamilies,thebasicdensity,theaveragegeneticgainsoffiberlength,ratiooffiberlengthtowidth,treeheight,DBH,stemstraightness,
4、volumewere-0.31%,1.18%,4.10%,3.25%,10.24%,0.23%,24.68%.Forbasicdensity,thegeneticgainsofNo.233wasthehighest;Forfiberlength,thegeneticgainsofNo.74wasthehighest;Fortreeheight,DBHandvolume,No.356showedhighestgeneticgains;Forstemstraightness,No.60andNo.233showedhighestgeneticgains.A
5、mongthis,thesuperiorfamilyNo.60,itonlyshowed-1.77.4%negativegeneticgaininbasicdensity,andinfiberlength,fiberwidth,ratiooffiberlengthtowidth,treeheight,DBH,stemstraightnessandvolumeitallshowedpositivegeneticgains.6.30-60、17-174、3-233、29-74、15-288、30-356wereselectedassuperiorVIind
6、ividualbysimpleindexmethod.Forcooperatingwithgeneticgain,familyNo.74showedthehighestgeneticgainsinbasicdensityas0.51%,familyNo.74alsoshowedhighestgeneticgainsinfiberlengthas10.56%,familyNo.356showedhighestgeneticgainsintreeheightas22.39%,familyNo.60showedhighestgeneticgainsinste
7、mstraightnessas3.62%.KEYWORD:Acaciacrassicarpa；Growthcharacter；Timbercharacter；Stemstraightness；Geneticvariation；Comprehensiveselection；GeneticgainVII目录摘要···········································································································IABSTRACT·········
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