南洋楹无性系多性状综合评价及选择OA

[Objective]To identify elite clones of Falcataria falcata with excellent growth and stress resist-ance,19 clones were comprehensively evaluated across four developmental stages of 0.5,1.5,2.5,and 3.5 years of age using growth traits(tree height,diameter at breast height(DBH)and volume),trunk shape(branching traits),wind damage rate,incidence rate,and comprehensive performance.[Methods]Analys-is of variance,correlation analysis,and Brecking's multi-trait comprehensive evaluation method were em-ployed to determine trait differences and genetic performance of clones across different age stages.[Res-ult]Highly significant differences(p<0.01)in tree height,DBH,and volume among clones at all ages.Stem volume exhibited the greatest genetic variation,while tree height demonstrated high stability.Clone B8 consistently exhibited superior growth performance across all age stages.Clones A4 and B2 had lower branching indices,indicating desirable trunk shape.Clones B2 and Da1 showed the lowest wind damage rate across all stages,indicating strong wind resistance.Clones A8,A9 and B8 were relatively suscept-ible to disease,whereas 57.89%of F.falcata clones(A1,A2,A3,A4,A6,B4,B7,TL14,TL17,Da1 and Da2)exhibited strong disease resistance.Correlation analysis revealed highly significant positive correla-tions among growth traits,while branching traits were negatively correlated with growth traits and stress resistance.Based on comprehensive multi-trait analysis,clones TL17,Da1,D12,and A4 were identified as elite candidates,exhibiting consistently superior growth and stress resistance across all age stages,along with high genetic gain and strong trait stability.[Conclusion]Clones TL17,Da1,D12 and A4 have excel-lent growth performance and strong stress resistance,and have important breeding and promotion value.These findings provide a valuable theoretical basis for the genetic improvement and efficient cultivation of F.falcata.