作者: Sally N. Aitken , Mats Hannerz
DOI: 10.1007/978-94-015-9650-3_2
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摘要: It has long been recognized that considerable genetic variation exists within conifer species for cold hardiness and associated phenological traits. As early as 1759, Linnaeus reported yew trees from France were less hardy than local ones in Sweden (Hesselman 1907) 1881, von Seckendorff observed differences between provenances of Abies douglasii Lindl. [syn. Pseudotsuga menziesii (Mirb.) Franco] Canada (summarized by Langlet 1971). Since these observations, clinal patterns have documented at both relatively coarse fine spatial scales, some broad generalizations can be drawn the extensive literature.