Patterns of Variation Among Climatic Races of Red‐Osier Dogwood
Patterns of Variation Among Climatic Races of Red‐Osier Dogwood
复制标题
红柳山茱萸气候小种的变异模式
DOI：
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发表时间：
1968
期刊：
影响因子：
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通讯作者：
Conrad J. Weiser
中科院分区：
文献类型：
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作者：
M. Smithberg;Conrad J. Weiser
红柳山茱萸（Cornus stolonifera Michx.）从该物种自然分布区的21个地点收集克隆，并在明尼苏达州的圣保罗的均匀地块中生长，以确定地理变异的程度和性质。注意到植物形态和生长速率的显著变化。气候种族之间的遗传影响是明显的，在秋季物候事件，如发病的休息，树皮颜色的变化，和叶片脱落。这些事件有关的种源功能，如冬季最低温度，生长季节的长度，并在较小程度上纬度。在秋季开始冷锻炼的时间不同的克隆，但没有差异，注意到在隆冬的最终程度的抗寒性。所有无性系春季萌芽和开花几乎同时发生，但红树皮颜色的损失有所不同。人工控制环境和田间试验结果表明，光周期是引起秋季现象的主要因素，而温度是最主要的影响因素。
Red—osier dogwood (Cornus stolonifera Michx.) clones were collected from 21 locations in the natural range of the species and grown in a uniform plot at St. Paul, Minnesota, to determine the extent and nature of geographic variation. Significant variations in plant form and growth rate were noted. Genetic influence among the climatic races was apparent in autumnal phenological events such as onset of rest, change of bark color, and leaf abscission. These events were related to provenance features such as winter minimum temperatures, length of growth season, and to a lesser extent to latitude. The time at which cold hardening began in the autumn differed among clones, but no differences were noted in the ultimate degree of hardiness in midwinter. Spring bud break and flowering occurred at about the same time in all clones, while the loss of red bark color varied. Controlled environment and field tests indicated that photoperiod was the prime factor triggering autumn phenomena, while temperature was most im...