Ecotypic Differentiation in Otago Populations of Narrowleaved Snow Tussock, Chionochloa rigida
Ecotypic Differentiation in Otago Populations of Narrowleaved Snow Tussock, Chionochloa rigida
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窄叶雪草丛、硬草根奥塔哥种群的生态型分化
DOI：
10.1080/0028825x.1965.10429021
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发表时间：
1965
期刊：
影响因子：
--
通讯作者：
A. Mark
中科院分区：
文献类型：
--
作者：
A. Mark
总结移植的四个领域之间的网站，也是一个花园，在一个温和的森林气候的成熟草丛杂草的片段表明，遗传和环境差异的相互作用决定了种群之间的大部分变化。一些受遗传控制的形态差异似乎没有生存价值，可能是对控制生长的遗传系统的环境选择效应的相关反应的结果。成花诱导对温度的反应以及开花时间和生长期的调整都表现出适应性的遗传变异。看来，物种内的一些海拔变化是共斜的，但仅基于四个种群的结果表明，在约1,500米以上存在一个独特的高海拔生态型的短草丛。种群是可变的，有进一步调整的潜力，但由于草丛的寿命长、不频繁的流动..
Summary The transplanting of segments of mature tussocks reciprocally between four field sites and also to a garden in a milder forest climate has shown that an interplay of genetic and environmental differences determines most of the variation between populations. Some of the genetically controlled morphological differences appear to have no survival value and are probably the result of correlated responses to the selective effect of the environment on the genetic system controlling growth. Genctic variation that is adaptive is displayed in the response to temperature of floral induction, and in the adjustment of flowering time and growth periods. It appears that some altitudinal variation within the species is ccoclinal, but the results based on only four populations suggest the presence of a distinct high-altitude ecotype of short tussocks above about 1,500 m. Populations arc variable with potential for further adjustment, but this must inevitably be slow because of longevity of tussocks, infrequent fl...