CSIRO, Division of Forest Research, P.O. Box 4008, 2600, Canberra, ACT, Australia.
Theor Appl Genet. 1987 Feb;73(4):616-22. doi: 10.1007/BF00289203.
Despite the fact that forest trees are in early stages of domestication there has been little direct evaluation of either the origin of, or genetic diversity within the breeding material in tree improvement programs. Allozyme variation was used to compare the total genetic diversity in the breeding programs of P. radiata within Australia and the five wild populations in North America. The current breeding populations were very similar genetically and were essentially homogenous with only 1.8% of the variation among programs. The total genetic diversity in the species was 0.12, which is a low estimate compared to most conifers. Overall in the Australian material the genetic diversity was somewhat less. The comparison of allelic frequencies in the five native populations with the Australian material indicates that the Monterey and Año Nuevo populations were probably the major source of the original introductions and that a substantial portion of the genetic diversity in the two populations has been captured in current breeding programs. The three southern populations do not appear to be currently represented in the breeding programs. The implications for future breeding strategies are discussed.
尽管森林树木正处于驯化的早期阶段，但对树木改良计划中繁殖材料的起源或遗传多样性的直接评估很少。利用同工酶变异来比较澳大利亚的辐射松育种计划内的总遗传多样性和北美的五个野生种群。当前的育种群体在遗传上非常相似，基本上是同质的，只有 1.8%的变异存在于计划之间。该物种的总遗传多样性为 0.12，与大多数针叶树相比，这是一个较低的估计值。总体而言，澳大利亚的材料遗传多样性略低。将五个本地种群的等位基因频率与澳大利亚的材料进行比较表明，蒙特雷和阿尼奥纽诺种群可能是最初引种的主要来源，并且两个种群中的大部分遗传多样性已经被当前的育种计划所捕获。这三个南部种群似乎目前不在育种计划中。讨论了对未来育种策略的影响。
