COST OF REPRODUCTION IN DOUGLAS-FIR
COST OF REPRODUCTION IN DOUGLAS-FIR
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DOI：
10.1139/b92-179
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发表时间：
1992-07-01
期刊：
影响因子：
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通讯作者：
BARCLAY, HJ
中科院分区：
文献类型：
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作者：
ELKASSABY, YA;BARCLAY, HJ
将能量资源分配给繁殖或生长之间的平衡具有相当大的理论意义。相互冲突的生态需求和进化压力往往需要在能量分配上进行权衡。对365株道格拉斯杉木（pseudosuga menziesii, Mirb.）的球果产量和年轮宽度进行了测定。从29个开放授粉的科中采集佛朗哥（Franco）树，历时8年。计算了每年的种球果产量和环宽的表型、遗传和环境相关性。八个环境相关性中有五个是负的（范围从-0.077到-0.305），反映了生理上权衡的现实。8个遗传相关中有6个为负相关(范围为-0。199 ~ -0.776)，说明在遗传水平上，能量分配给生殖和能量分配给体细胞生长之间存在权衡。这些发现与目前的生命史进化理论相一致。
The balance between allocating energy resources to reproduction or growth has considerable theoretical interest. Conflicting ecological requirements and evolutionary pressures often necessitate a trade-off in energy allocation. We obtained measurements on seed-cone production and annual ring width of 365 Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) trees from 29 open-pollinated families for 8 years. Phenotypic, genetic, and environmental correlations were computed for seed-cone production and ring width for each year. Five of the eight environmental correlations were negative (range -0.077 to -0.305), reflecting the reality of the trade-off in physiological terms. Six of the eight genetic correlations were negative (range -0. 199 to -0.776), indicating that a trade-off exists at the genetic level between energy allocation to reproduction and to somatic growth. These findings agree with the current theory of life-history evolution.