ArticleProceedings of the National Academy of Sciences of the United States of America2015
Unilateral incompatibility gene ui1.1 encodes an S-locus F-box protein expressed in pollen of Solanum species.
Article in Proceedings of the National Academy of Sciences of the United States of America, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 33 papers.
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33 citing papers in PubMed.
- Reproductive isolation emerges from coordinated barriers during mating system divergence in plants.AoB PLANTS · 2026Article
- Molecular Docking of Natural Products: Critical Appraisal of Current Methodology and Practical Guidelines.Molecules (Basel, Switzerland) · 2026Review
- Cross incompatibility restricting genome exchange and diversification of primary gene pool in plants: challenges and opportunities.TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik · 2026Review
- Wild tomato genome assemblies reveal structural variants and repeat content act as recombination barriers.Nature communications · 2026Article
- S-RNase-based self-incompatibility in angiosperms: Degradation, condensation, and evolution.Plant physiology · 2025Review
- PSIA: A Comprehensive Knowledgebase of Plant Self-incompatibility.Genomics, proteomics & bioinformatics · 2025Article
- Molecular mechanisms and genetic regulation of self-incompatibility in flowering plants: implications for crop improvement and evolutionary biology.Plant molecular biology · 2025Review
- Mismatch between pollen and pistil size causes asymmetric mechanical reproductive isolation across Phlox species.Evolution; international journal of organic evolution · 2024Article
- Mismatch between pollen and pistil size causes asymmetric mechanical reproductive isolation acrossbioRxiv : the preprint server for biology · 2024Article
- Molecular insights into self-incompatibility systems: From evolution to breeding.Plant communications · 2024Review
- A toxin-antidote system contributes to interspecific reproductive isolation in rice.Nature communications · 2023Article
- The Effect of Self-Compatibility Factors on Interspecific Compatibility inPlants (Basel, Switzerland) · 2023Article
- The Snapdragon Genomes Reveal the Evolutionary Dynamics of the S-Locus Supergene.Molecular biology and evolution · 2023Article
- Mechanisms of prezygotic post-pollination reproductive barriers in plants.Frontiers in plant science · 2023Review
- The selfing syndrome and beyond: diverse evolutionary consequences of mating system transitions in plants.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2022Review
- Cross compatibility in intraspecific and interspecific hybridization in yam (Dioscorea spp.).Scientific reports · 2022Article
- A Cysteine-Rich Protein, SpDIR1L, Implicated in S-RNase-Independent Pollen Rejection in the Tomato (International journal of molecular sciences · 2021Article
- A mutation in a C2H2-type zinc finger transcription factor contributed to the transition toward self-pollination in cultivated tomato.The Plant cell · 2021Article
- Against the Odds: Hybrid Zones between Mangrove Killifish Species with Different Mating Systems.Genes · 2021Article
- Ornithine decarboxylase genes contribute to S-RNase-independent pollen rejection.Plant physiology · 2021Article
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2 authors.
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Abstract
Unilateral interspecific incompatibility (UI) is a postpollination, prezygotic reproductive barrier that prevents hybridization between related species when the female parent is self-incompatible (SI) and the male parent is self-compatible (SC). In tomato and related Solanum species, two genes, ui1.1 and ui6.1, are required for pollen compatibility on pistils of SI species or hybrids. We previously showed that ui6.1 encodes a Cullin1 (CUL1) protein. Here we report that ui1.1 encodes an S-locus F-box (SLF) protein. The ui1.1 gene was mapped to a 0.43-cM, 43.2-Mbp interval at the S-locus on chromosome 1, but positional cloning was hampered by low recombination frequency. We hypothesized that ui1.1 encodes an SLF protein(s) that interacts with CUL1 and Skp1 proteins to form an SCF-type (Skp1, Cullin1, F-box) ubiquitin E3 ligase complex. We identified 23 SLF genes in the S. pennellii genome, of which 19 were also represented in cultivated tomato (S. lycopersicum). Data from recombination events, expression analysis, and sequence annotation highlighted 11 S. pennellii genes as candidates. Genetic transformations demonstrated that one of these, SpSLF-23, is sufficient for ui1.1 function. A survey of cultivated and wild tomato species identified SLF-23 orthologs in each of the SI species, but not in the SC species S. lycopersicum, S. cheesmaniae, and S. galapagense, pollen of which lacks ui1.1 function. These results demonstrate that pollen compatibility in UI is mediated by protein degradation through the ubiquitin-proteasome pathway, a mechanism related to that which controls pollen recognition in SI.
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