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The intra-provenance correlation between annual rhythm and growth of single trees of Pinus silvestris L.

机译:樟子松单株生长年节律与单株生长的种源间相关性

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摘要

The annual rhythm and height of 21-year-old trees was registered over two consecutive years in three provenance field tests in central Sweden. The rhythm of approx. 200 trees from each of four provenances was characterized by the pattern of needle elongation and the changes in bark colour of terminals. Correlation, regression and multiple discriminant analyses revealed a strong relationship between origin and annual rhythm but exhibited at the same time a large intra-provenance variation. It was shown that disharmony between the rhythm of the tree and the external climate results in a decrease of growth. The variation within a stand progeny was found to be so large that, irrespective of planting site, there were some trees that were genetically unfit for the climate. Selection in the nursery may decrease this heterogeneity. It was shown how the regression of height on rhythm among trees within a population may be used in tree breeding to asses plasticity, degree of adaptation to the test site, and potential growth capacity in different environments.
机译:在瑞典中部的三个物产田间试验中,连续两年记录了21岁树的年节律和高度。大约的节奏四个来源的每棵都有200棵树,其特征在于针的伸长方式和末端树皮颜色的变化。相关性,回归和多重判别分析显示出起源和年度节律之间有很强的关系,但同时显示出种源内差异很大。结果表明,树木的节奏与外部气候之间的不协调会导致生长减少。发现林分后代中的变异非常大,以至于不论种植地点如何,都有一些遗传上不适合气候的树木。在苗圃中进行选择可能会降低这种异质性。结果表明,种群中树木间节律高度的回归如何可用于树木育种中以评估可塑性,对测试地点的适应程度以及在不同环境中的潜在生长能力。

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    Hagner Mats;

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  • 年度 1970
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  • 正文语种 swe
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