Marshall B, Harrison R E, Graham J, McNicol J W, Wright G, Squire G R
Scottish Crop Research Institute, Invergowrie, Dundee DD2 5DA, UK.
New Phytol. 2001 Sep;151(3):671-682. doi: 10.1046/j.0028-646x.2001.00220.x.
• The question 'are fragmented wild populations of raspberry adaptively differentiated from each other and from cultivated forms of the same species?' is addressed here. • Plants collected from the coast, where commercial raspberries are grown, northwards by 49 km to an altitude of 600 m in Tayside, Scotland, were cultured in two common environments. Twenty phenotypic traits were recorded over 2 yr, on vegetative primocanes and then the single dominant floricane retained for year 2. A novel approach is presented for selecting traits that best discriminate between individuals using principal coordinate analysis. Phenotypic variation among accessions was then quantified using principal coordinate analysis followed by principal component analysis. • A consistent north-south trend was found. Plants from northern sites were shorter, bushier with less lateral growth and fewer flowers per lateral on the dominant fruiting cane. Plants from southern sites produced few, tall primocanes with greater cane diameters, lateral growth and flowering. The results were consistent across test environments. • The results confirm substantial, adaptive differentiation between populations and suggest a limited effect of cultivation on wild forms.
• 本文探讨了“悬钩子属野生种群彼此之间以及与同物种栽培形式之间是否存在适应性分化？”这一问题。• 从商业悬钩子种植地海岸采集的植株向北移动49公里，至苏格兰泰赛德海拔600米处，在两种常见环境中进行培育。在两年时间里记录了20个表型性状，先是在营养性初生茎上记录，然后是保留到第二年的单一优势花茎。提出了一种新方法，利用主坐标分析选择最能区分个体的性状。然后使用主坐标分析，接着进行主成分分析，对种质间的表型变异进行量化。• 发现了一致的南北趋势。北部地区的植株较矮，丛生，侧枝生长较少，优势结果茎上每个侧枝的花较少。南部地区的植株产生的初生茎少、高，茎直径更大，侧枝生长和开花更多。结果在不同测试环境中是一致的。• 结果证实了种群之间存在显著的适应性分化，并表明栽培对野生形式的影响有限。
