De novo domestication has received recent attention because of the potential to produce new crop species with additional agroecosystem functions and useful products for climate-resilient agricultural systems of the future. However, there are often traits in wild species that make them difficult to domesticate. One key domestication trait selected by early farmers and modern plant breeders in many crops is the ability to self-pollinate. Benefits include higher seed set and more reliable seed production, as well as more efficient selection during breeding because it allows for unmasking of recessive traits and enforcement of favorable gene interactions. Similarly, interspecific hybridization has been used to add to the genetic diversity of many crop species. We evaluated self-pollination and interspecific hybridization in Silphium integrifolium and S. perfoliatum to learn the extent of possible gene flow between the species and its usefulness in cultivar development and the potential for fixation of favorable domestication genes by self-pollination. Our results indicate that Silphium interspecific hybrids can be easily developed, potentially facilitating movement of otherwise invariable traits from one species to another. Further, we showed, for the first time, that self-pollination is also possible in both species and their interspecific hybrids, but the rate varies among genotypes. This has profound implications in optimizing plant breeding methods for the study and improvement of these species and adds more evidence to our understanding of mating systems in Asteraceae, an underutilized family of plants with great potential for additional domesticated species.

中文翻译：

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从头进行驯化以改善农业生态系统的多年生草本紫ster的交配相容性和肥力研究

从头驯化受到了最近的关注，因为它有潜力生产具有其他农业生态系统功能的新作物品种，并为未来具有气候适应力的农业系统提供有用的产品。但是，野生物种通常具有某些特征，使其难以驯化。早期农民和现代植物育种者在许多作物中选择的关键驯化性状之一是自花授粉的能力。好处包括更高的结实率和更可靠的种子产量，以及在育种期间更有效的选择，因为它可以揭示隐性性状并有利于有利的基因相互作用。同样，种间杂交已被用于增加许多作物物种的遗传多样性。我们评估了自花授粉和种间杂交整ph和S. perfoliatum可以了解物种之间可能的基因流动程度，及其在品种开发中的有用性，以及通过自花传粉固定有利的驯化基因的潜力。我们的结果表明，Silphium种间杂种很容易开发，可能会促进原本不变的性状从一个物种向另一个物种的转移。此外，我们首次表明，在两个物种及其种间杂种中，自花授粉也是可能的，但是在不同基因型中其发生率却有所不同。这对于优化植物育种方法以研究和改良这些物种具有深远的意义，并为我们对菊科植物交配系统的理解提供了更多的证据，菊科是一种利用不足的植物家族，具有更多驯化物种的潜力。