Genetic and molecular analyses of the S-locus in wild potato Solanum chacoense

野生马铃薯Solanum chacoense S基因座的遗传和分子分析

• 批准号: 2992-2007
• 负责人: Cappadocia, Mario
• 金额: $ 2.19万
• 依托单位: Université de Montréal
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2009
• 资助国家: 加拿大
• 起止时间: 2009-01-01 至 2010-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=419645
• 关键词: Genetic; molecular; analyses; locus; wild

Self-incompatibility (SI) is one of the most widespread evolutionary devices used by flowering plants to promote gene exchange within a given species and avoid inbreeding. In Solanaceous plants like Solanum chacoense the pistillar determinant to SI is an extremely polymorphic stylar extracellular S-RNase. The pollen determinant to SI has been identified as an F-box family member (SLF or S-locus F-box). It has been proposed that in compatible crosses,ubiquitin-mediated S-RNase degradation takes place. This, however, has not been unambiguously demonstrated. Indeed, it appears that the biochemistry and physiology underlying pollen rejection is a far more complex than previously suspected.

自交不亲和性（SI）是开花植物用来促进特定物种内基因交换和避免近亲繁殖的最广泛的进化手段之一。 在茄科植物（如茄科茄）中，SI的雌蕊决定因素是一种极其多态的花柱细胞外S-RNase。S1的花粉决定子被鉴定为F-box家族成员（SLF或S-locus F-box）。有人提出，在亲和杂交中，发生泛素介导的S-RNase降解。然而，这一点并没有得到明确的证明。事实上，花粉排斥背后的生物化学和生理学似乎比以前怀疑的要复杂得多。