Ross-Ibarra Jeffrey
Department of Genetics, Life Sciences Building, University of Georgia, Athens, Georgia, 30602, USA.
Am Nat. 2004 Jan;163(1):105-12. doi: 10.1086/380606. Epub 2004 Jan 28.
The successful domestication of wild plants has been one of the most important human accomplishments of the last 10,000 yr. Though our empirical knowledge of the genetic mechanisms of plant domestication is still relatively limited, there exists a large body of theory that offers a host of hypotheses on the genetics of domestication. Two of these that have not been addressed concern the role of recombination in the process of domestication. The first predicts an increase in recombination rate through domestication, while the second argues that recombination rate should serve as a preadaptation to domestication. This study makes use of data on chiasma frequencies available from almost a century of plant cytogenetical literature to test these two hypotheses. The results support the hypothesis that domestication selects for an increase in recombination, and in rejecting the preadaptation hypothesis, they suggest directions for future research into the possibility of preadaptation to domestication.
野生植物的成功驯化是过去一万年中人类最重要的成就之一。尽管我们对植物驯化遗传机制的实证知识仍然相对有限，但存在大量理论，提出了许多关于驯化遗传学的假设。其中两个尚未得到解决的问题涉及重组在驯化过程中的作用。第一个预测驯化过程中重组率会增加，而第二个则认为重组率应作为对驯化的预适应。本研究利用近一个世纪植物细胞遗传学文献中可获得的交叉频率数据来检验这两个假设。结果支持了驯化选择增加重组的假设，并且在否定预适应假设的同时，为未来研究预适应驯化可能性指明了方向。
