Environment drives spatiotemporal patterns of clonality in white spruce (Picea glauca) in Alaska
Environment drives spatiotemporal patterns of clonality in white spruce (Picea glauca) in Alaska
复制标题
环境驱动阿拉斯加白云杉(Picea glauca)克隆性的时空模式
DOI:
10.1139/cjfr-2018-0234
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发表时间:
2018
影响因子:
2.2
通讯作者:
Schnittler M
中科院分区:
文献类型:
--
作者:
Würth DG;Eusemann P;Trouillier M;Burras A;Burger A;Wilmking M;Roland CA;Juday GP;Schnittler M
Many plant species reproduce by cloning if environmental conditions are unfavorable for sexual reproduction. To test the alternative hypotheses, whether cloning is an “exit strategy” or caused by selection, clonal growth in white spruce (Picea glauca(Moench) Voss) was investigated in three stands in Alaska, each consisting of a core (closed forest) plot and an edge (tree-line) plot. In total, 2571 trees were mapped and genotyped with 11 single sequence repeat (SSR) markers. The proportion of clonal trees follows a moisture gradient and was lowest in the dry Interior basin (4.5%), followed by the sites at the Alaska Range (9.0%) and the Brooks Range (21.7%). At the two latter sites, clonal growth was more frequent in the edge plot. A comparison among 960 aged trees revealed that clonal growth becomes more likely with increasing age and continues over the life span of a tree. Genetic data do not indicate any genetic predisposition for cloning. Clonal growth in white spruce most likely takes place via layering and depends on environmental conditions. Because performance of the trees, and therefore likely plant reproductive success, is lower in plots with a high proportion of clones, selection for clonal growth seems to be highly unlikely.
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DOI:
--
发表时间:
1992
期刊:
影响因子:
--
作者:
C. Lavoie;S. Payette
通讯作者:
S. Payette
DOI:
--
发表时间:
2004
期刊:
American-Eurasian journal of botany
影响因子:
--
作者:
V. Douhovnikoff;Adelaide M Cheng;R. Dodd
通讯作者:
R. Dodd
影响因子:
11.6
作者:
X. Walker;G. Henry;K. McLeod;A. Hofgaard
通讯作者:
A. Hofgaard
影响因子:
2.7
作者:
C. Roland;J. Schmidt;J. Johnstone
通讯作者:
J. Johnstone
DOI:
--
发表时间:
1981
期刊:
影响因子:
--
作者:
A. Légére;S. Payette
通讯作者:
S. Payette