Southeastern Forest Experiment Station, Asheville, North Carolina, USA.
Theor Appl Genet. 1972 Jan;42(4):151-9. doi: 10.1007/BF00280791.
The development of genetic variances in height growth of Douglas-fir over a 53-year period is analyzed and found to fall into three periods. In the juvenile period, variances in environmental error increase logarithmically, genetic variance within populations exists at moderate levels, and variance among populations is low but increasing. In the early reproductive period, the response to environmental sources of error variance is restricted, genetic variance within populations disappears, and populational differences strongly emerge but do not increase as expected. In the later period, environmental error again increases rapidly, but genetic variance within populations does not reappear and population differences are maintained at about the same level as established in the early reproductive period. The change between the juvenile and early reproductive periods is perhaps associated with the onset of ecological dominance and significant allocations of energy to reproduction.
对 53 年来花旗松高度生长的遗传变异的发展进行了分析，发现其分为三个时期。在幼年期，环境误差的方差呈对数增长，种群内的遗传方差处于中等水平，种群间的方差较低但呈上升趋势。在早期繁殖期，对环境误差方差的响应受到限制，种群内的遗传方差消失，种群差异明显出现但并未如预期般增加。在后期，环境误差再次迅速增加，但种群内的遗传方差并未再次出现，种群差异保持在早期繁殖期建立的大致相同水平。幼年期和早期繁殖期之间的变化可能与生态优势的出现和大量能量向繁殖的分配有关。
