【摘要】 对杉木8个无性系全双列杂交组合的32年生成林的树高、胸径和材积作了杂交优势和自交衰退效应分析,并对配合力方差和配合力效应值进行了计算。得出如下结论:3个性状都存在真实的遗传变异,一般配合力、特殊配合力、正反交效应方差都达到显著水平,且材积以特殊配合力的遗传方差比(GVC)最大。评选出适于杂交的优良无性系3个,适于建立双系种子园的优良无性系2组,适于选作二代优树的优良杂交组合19个。更多还原

【Abstract】 The eight clones of Chinese fir complete diallel crosses of 32-year-old forest’s tree height,DBH and volume for test the advantages of hybrid and inbred fading effect analysis,and the combining ability variance and combining ability effect value were calculated. The result show that: true genetic variation exists in three traits,general combining ability,special combining ability,positive and negative cross effect variance all reached significant level,and volume to special combining ability of the genetic variance ratio( GVC) is maximum. Selected three excellent clones for hybridization and two growps of excellent clones for Bi-clonal seed orchard,and 19 combination of cross superior trees for second generation.更多还原