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首页> 外文期刊>Trees. Structure and Function >Wood density proxies of adaptive traits linked with resistance to drought in Douglas fir (Pseudotsuga menziesii (Mirb.) Franco)
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Wood density proxies of adaptive traits linked with resistance to drought in Douglas fir (Pseudotsuga menziesii (Mirb.) Franco)

机译：适应性状的木材密度代理与花旗松的抗旱性相关（Pseudotsuga menziesii（Mirb。）Franco）

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摘要

Proxies of adaptive traits for resistance to drought were discovered among original annual ring density variables in Douglas fir. A comparison of dead and surviving Douglas fir trees following the 2003 drought was made to define proxies of adaptive traits for resistance to drought. Increment cores were sampled from trees from three French regions: Centre, Midi-Pyr,n,es and Burgundy. Original tree-ring variables were calculated, based on a sliding density criterion dividing the microdensity profile into high- and low-density segments. Tree rings were analysed at each site in a number of consecutive annual rings before the 2003 drought event. Comparison between pairs of surviving and dead trees and between pairs of randomly selected trees (whether dead or alive) supports the evidence of systematic dissimilarities between surviving and dead trees in a number of original density variables. Correlation analysis between original and conventional ring density variables indicates a weak association. We found that the surviving trees were denser than the dead trees in all three sites, but that the denser part of the ring varied from region to region. We identified several original density variables intended to be used as proxies of adaptive traits in future studies of genetic determinism of Douglas fir resistance to drought
机译：在道格拉斯冷杉的原始年轮密度变量中发现了抗旱适应性状的代理。对2003年干旱后枯死的和存活的花旗松树进行了比较，以确定抗旱适应性状的代理。增量岩心来自法国三个地区的树木：中部，南比利牛斯，勃艮第和勃艮第。基于滑动密度标准，将微密度分布图分为高密度和低密度段，计算出原始的年轮变量。在2003年干旱事件发生之前，已在每个站点连续多次对年轮进行了年轮分析。成对的存活树和枯树之间以及随机选择的成对树（无论是死树还是活树）之间的比较支持了许多原始密度变量中存活树和枯树之间系统差异的证据。原始和常规环密度变量之间的相关性分析表明关联较弱。我们发现，在这三个位置上，幸存的树木比枯死的树木更茂密，但是环的较稠密的部分随区域的不同而不同。我们确定了一些原始的密度变量，打算用作道格拉斯冷杉抗旱遗传决定论的未来研究中的适应性状代理

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