nlwxpearo
Joined: 13 Dec 2010
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Location: England
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 Posted: Wed 22:39, 26 Jan 2011 Post subject: Mountain Casuarina family genetic parameters estim |
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Mountain Casuarina family genetic parameters estimation and Family Selection
BaiJtn,[link widoczny dla zalogowanych], HAbstractAprogenytesttrialwith31familiesofCasuarina Soft nghuhnianawasestab-lishedatYangxiofGuangdong. Afterplanting, treeheightsweremeasuredfor6timesandDBHwasfor5times. Basedon12quantityorqualitytraitsofthe31families, analysisofvariance, eovariance, correlation, variancecomponentwerecarriedouttOestimategeneticvariationcoefficient (Gcv),[link widoczny dla zalogowanych], familyherhability (hD, early-latecorrelationoftreeheight () andDBH, phenotypicandgeneticcorrelationandgeneticgain.Resultsshowedthattherearesignificantcorrelationinheightsfromthe5monthsto5yearsandDBHfrom1yearto5yearsafterplanting.Thereweresignificantdifferencesin12traitvalueetweenfamilies.Geneticvariationcoefficientsoftreeheight, DBH, singletreevolume (), poleheight (Hs) andcrownwidth (Cm) wererespectively35.56,[link widoczny dla zalogowanych], 33.44%, 93.02,30.91 and22.53, othertraitvalueswere3.9j ~ 16.02.Analysedthephenotypicandgeneticcorrelationof13traitvalues.Calculatedtheheritablitiesfor12traits, exceptsurvivalpercentageheritabili-tywas0.55,[link widoczny dla zalogowanych], theother11traitsofheritabiliteswere0.8O ~ O.94.Whenselectionportorptionwas2O, geneticgainsofmaingrowthtraitsin, DBHandVwererespectively24.03, 22 .38 and6o.9O, andgeneticgainsofmainqualitytraitsinstemstraightness, permanentbranchdensity, survivalpercentage, stempersistenceandtreehealthlevelwere6.85 ~ 15.17.Finally, usingbreedingvaluesandselectionindexes,[link widoczny dla zalogowanych], evaluatingthe31'familiesofper-formanceandfoundoutsomedominantfamilies. KeywordsCasuarina blood nghuhnianafamilyselectiongeneticparameterZhongChonglu-AssociatePro [essor-h ��Jiaya (ThekcIlInstitate. fTropicalForestry-CAFGuangthou510520).
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