马尾松生长势与同功酶表型的关系

CORRELATIONS BETWEEN THE GROWTH VIGOUR AND ISOZYME PHENOTYPES OF PINUS MASSONIANA LAMB

５个天然马尾松群体同功酶表型研究结果表明，不同生长势水平的个体Ａａｐ－１位点上Ａａｐ－１ｄ基因频率，表出优势木水平小于平均术水平的变化规律。典型判别分析进一步证实不同生长势水平个体间Ａａｐ－１位点Ａａｐ－１ｄ基因频率有极显著性差异，并基本上划分为二个类群。最后把含有Ａａｐ－１ｄ基因的单株归为一类，不含有Ａａｐ－１ｄ基因的单株归为另一类，作树高、胸径的方差分析，同样表明，树高生长有明显差异，而胸径生长则无差异。结果说明Ａａｐ－１ｄ基因与马尾松树高生长有关。可以推测Ａａｐ－１ｄ基因附近紧密连锁了一些不利于马尾松树高生长的基因。

A laboratorv analysis of isozyme phenotype for five natural populations of Pinus massoniana showed that there was an irregular variation in the frequency express of Aap-1d gene in Aap-1 loci among trees with different levels of growth vigour,in comparison with the standard trees in the sampled plots,the dominant trees had lower average frequencies. Through canonical discriminant analysis,all the sampled individual trees could be distinguished as two groups by frequency express of gene Aap-1d in Aap-1 loci,one group comprised the individuals with Aap-1d gene, the other with no Aap-1d. The analyses of variance was made for tree height and DBH based on the two groups and the results indicated that significant differences existed in the height growth but DBH. A conclusion could be drawn that height growth of this species was correlated with Aap-1d genes interlocking other genes which affected negatively the height growth of trees.