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首页> 外文期刊>Scandinavian Journal of Forest Research >Variability in height growth, survival and nursery carryover effect of Betula papyrifera provenances.
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Variability in height growth, survival and nursery carryover effect of Betula papyrifera provenances.

机译：产莎草的身高生长，存活和育苗效果的变异性。

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摘要

Eleven paper birch (Betula papyrifera Marsh.) provenances from a single geographic region in northern Idaho and four geographic regions in British Columbia (BC) were studied to determine whether morphometric variability was due to species' genetics, growing environment, or their interaction. Seedlings were grown at three nurseries in BC and Idaho and planted in a randomised single-tree interlocking block design at Skimikin (50 degrees 47') and Red Rock (53 degrees 45') common gardens in BC. Geographic variation in birch height growth was regulated by genetics and a complex interaction with environmental factors. Growth does not follow latitudinal, longitudinal or elevational clines although provenances at the southern garden showed better height growth compared to the northern garden. Greater percentages of seedling mortality were observed at the northern garden compared to provenances planted at the southern garden. Birch height growth was significantly influenced by nursery displacement effects up to four years after establishment. The safe range of southward seed-transfer distance may be as much as 5 degrees , and beyond this limit a detrimental effect likely occurs. Collectively, these results suggest that a provenance best suited to one environment might not be the best for another environment. However, these findings will be useful in understanding the genecology of paper birch when establishing operational seed-transfer guidelines in BC.
机译：研究了爱达荷州北部一个地理区域和不列颠哥伦比亚省（BC）四个地理区域的11个桦树种（Betula papyrifera Marsh。）种源，以确定形态变异性是由于物种的遗传，生长环境还是它们之间的相互作用所致。幼苗在不列颠哥伦比亚省和爱达荷州的三个苗圃中生长，并在不列颠哥伦比亚省的斯基米金（50度47'）和红岩（53度45'）的公共花园中种植了随机的单树互锁块设计。桦树高度生长的地理变异受遗传因素以及与环境因素的复杂相互作用的调节。尽管南部花园的种源显示出比北部花园更好的身高增长，但生长并没有遵循纬度，纵向或海拔线。与在南部花园种植的种源相比，在北部花园观察到更高的幼苗死亡率百分比。在建立后的四年内，桦树的高度生长受到苗圃移位效应的显着影响。向南的种子转移距离的安全范围可能高达5度，超过此限制可能会产生有害影响。总体而言，这些结果表明，最适合一种环境的出处可能不是另一种环境的最佳出处。但是，在卑诗省建立操作性种子转移指南时，这些发现将有助于理解桦木的遗传学。

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