Hardner Craig M, Potts Bradley M, Gore Peter L
Cooperative Research Centre for Sustainable Production Forestry, Department of Plant Science, University of Tasmania, GPO Box 252-55, Hobart, Tasmania, 7001, Australia.
Evolution. 1998 Apr;52(2):614-618. doi: 10.1111/j.1558-5646.1998.tb01660.x.
The genetic structure of Eucalyptus globulus forest was examined using progeny vigor as an indirect measure of parental relatedness. Seven trees were crossed with pollen from trees: 0 m (seifing); 21 m (nearest flowering neighbors), 250 m, 500 m, 1 km, 10 km, and 100 km away from the female. Only selfing depressed seed set. Growth of the 21 m progenies was intermediate to selfing and the longer distance pollinations, suggesting tight family clusters occur due to limited seed dispersal. Under this structure biparental inbreeding may be common, however, the cumulative impact of inbreeding seems negligible as relatedness did not appear to decline with distance between mates beyond 50 m.
利用子代活力作为亲本亲缘关系的间接度量，对蓝桉林的遗传结构进行了研究。七棵树与来自距离雌树0米（自交）、21米（最近的开花邻居）、250米、500米、1千米、10千米和100千米处树木的花粉进行杂交。只有自交降低了结实率。21米处子代的生长介于自交和更远距离授粉之间，这表明由于种子传播有限，出现了紧密的家族集群。在这种结构下，双亲近亲繁殖可能很常见，然而，近亲繁殖的累积影响似乎可以忽略不计，因为亲缘关系在配偶间距离超过50米后似乎并未随距离下降。
