Genomic Consequences of Diploid Hybrid Speciation in Helianthus

一般来说，已提出用于植物，特别是开花植物的一种物种形成模式是二倍体/二倍体杂交。这种想法在植物进化生物学家中广泛流行，尽管没有明确的例子证明这一过程，理论上似乎也不太可能。PI提出了测试，以绘制这种物种形成模式的三个假定例子的进化遗传学。在这个过程中，他预计会对这三个物种是杂交起源的假设进行更多的测试。随后的事件，如染色体重排，可能有一个轴承的成功的杂交和隔离障碍也将进行探讨。由于杂交被认为在有花植物中具有广泛的重要性，这项研究的结果可能对我们的植物进化概念产生深远的影响。

One mode of speciation that has been proposed for plants in general, and especially flowering plants, is diploid/diploid hybridization. This idea is in wide currency among plant evolutionary biologists although there a no unequivocal examples of this process and theoretically it seems highly unlikely. The PI proposes the test to chart the evolutionary genetics of three putative examples of this mode of speciation. In the process, he anticipates additional tests of the hypothesis that the three species are of hybrid origin. Subsequent events, such as chromosomal rearrangement, that might have had a bearing on the success of the hybrids and on isolation barriers will also be explored. Because hybridization has been assumed to be of widespread importance among the flowering plants, the results of this study could have a profound influence on our concepts of plant evolution.