Genetic variation for needle traits in Scots pine (Pinus sylvestris L.)
Genetic variation for needle traits in Scots pine (Pinus sylvestris L.)
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DOI：
10.1007/s11295-016-1000-4
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发表时间：
2016-06-01
影响因子：
2.4
通讯作者：
Ennos, Richard A.
中科院分区：
文献类型：
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作者：
Donnelly, Kevin;Cavers, Stephen;Ennos, Richard A.
喀里多尼亚原生松林的遗迹分布在苏格兰高地一个相对狭窄的地理区域，但在降雨、温度和海拔高度方面存在着陡峭的环境梯度。以前的工作的基础上共同花园试验表明，本地松树种群（樟子松（L.）在生长、物候和抗冻性方面表现出分化。然而，尽管它们在植物适应性中发挥着重要作用，但关于叶子性状却没有这样的信息，而叶子性状已经显示出对其他物种环境变化的可塑性和适应性遗传反应。我们分析了一个子集的11针字符在192个树苗生长在一个人口后代共同的花园试验的基础上，从8个本地松林的种子。狭义遗传力（h（2））估计为每个性状，并发现特别高（1.30 +/- 0.33）树脂道密度。大多数的表型变异是在人口内，虽然种群间分化检测针的长度（Δ AICc = 2.55）。树脂道密度与经度呈正相关（β = 0.45，Δ AICc = 4.23），气孔列密度与经度呈负相关（β =-0.12，Δ AICc = 2.55）。这些趋势可能反映了苏格兰东部和西部人口之间的水分供应和海拔高度的差异适应。
The remnants of the Caledonian Native Pinewood are distributed across a relatively narrow geographic area in the Scottish Highlands yet inhabit a steep environmental gradient in terms of rainfall, temperature and altitude. Previous work based on common garden trials has demonstrated that native pine populations (Pinus sylvestris (L.)) exhibit differentiation in terms of growth, phenology and frost resistance. However, despite their important role in plant fitness, no such information is available on leaf traits, which have shown both plastic and adaptive genetic responses to environmental variation in other species. We analysed a subset of 11 needle characters in 192 saplings grown in a population-progeny common garden trial based on seedlots from eight native pinewoods. Narrow-sense heritability (h(2)) was estimated for each trait and found to be particularly high (1.30 +/- 0.33) for resin canal density. The majority of the phenotypic variation found was within populations, although interpopulation differentiation was detected for needle length (Delta AICc = 2.55). Resin canal density was positively correlated with longitude (beta = 0.45, Delta AICc = 4.23), whereas stomatal row density was negatively correlated (beta = -0.12, Delta AICc = 2.55). These trends may reflect adaptation for differences in moisture availability and altitude between eastern and western populations in Scotland.