{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,23]],"date-time":"2026-09-23T14:39:53Z","timestamp":1790174393806,"version":"4.1.0"},"reference-count":41,"publisher":"Wiley","issue":"4","license":[{"start":{"date-parts":[[2025,8,21]],"date-time":"2025-08-21T00:00:00Z","timestamp":1755734400000},"content-version":"vor","delay-in-days":20,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["The Plant Journal"],"published-print":{"date-parts":[[2025,8]]},"abstract":"SUMMARY<\/jats:title>\n \n Pistils of self\u2010incompatible (SI) species\/populations typically reject pollen of related self\u2010compatible (SC) species\/populations, but not vice versa, a pattern known as unilateral incompatibility (UI). UI is complex and includes both S\u2010RNase\u2010dependent and S\u2010RNase\u2010independent mechanisms. Pistils of\n Solanum pennellii<\/jats:italic>\n LA0716 (SC, no S\u2010RNase) reject pollen of cultivated tomato,\n Solanum lycopersicum<\/jats:italic>\n (SC); UI in this system involves the expression of\n ornithine decarboxylase2<\/jats:italic>\n (\n ODC2<\/jats:italic>\n ) and\n HT\u2010A<\/jats:italic>\n \/\n \u2010B<\/jats:italic>\n genes in the pistil, and\n farnesyl pyrophosphate synthase2<\/jats:italic>\n (\n FPS2<\/jats:italic>\n ),\n ui6.2<\/jats:italic>\n , and\n ui12<\/jats:italic>\n .\n 2<\/jats:italic>\n in pollen. We show that IL12\u20103 (\n HT\u2010A\/\u2010B<\/jats:italic>\n )\u2009\u00d7\u2009IL3\u20103 (\n ODC2<\/jats:italic>\n ) double introgression lines reject\n S. lycopersicum<\/jats:italic>\n pollen, while\n odc2<\/jats:italic>\n or\n ht\u2010a<\/jats:italic>\n mutants do not, demonstrating that\n ODC2<\/jats:italic>\n and\n HT\u2010A<\/jats:italic>\n are required for UI. Transmission ratio distortion in favor of\n pennellii<\/jats:italic>\n alleles was observed in interspecific F\n 2<\/jats:sub>\n S. lycopersicum<\/jats:italic>\n \u2009\u00d7\u2009\n S. pennellii<\/jats:italic>\n near\n ui6.2<\/jats:italic>\n and\n ui12.2,<\/jats:italic>\n and in F\n 2<\/jats:sub>\n IL12\u20103\u2009\u00d7\u2009IL3\u20103 near\n ui12.2.<\/jats:italic>\n Equivalent populations made with\n odc2<\/jats:italic>\n mutants segregate in Mendelian ratios, while\n ht\u2010a<\/jats:italic>\n mutants have little effect, indicating\n ui6.2<\/jats:italic>\n and\n ui12.2<\/jats:italic>\n interact primarily with\n ODC2<\/jats:italic>\n . Pollen from\n fps2<\/jats:italic>\n mutants in\n S. pennellii<\/jats:italic>\n LA0716 are incompatible on pistils of all tested\n S. pennellii<\/jats:italic>\n and some\n Solanum habrochaites<\/jats:italic>\n accessions, but compatible with all other tomato clade species, suggesting\n ODC2<\/jats:italic>\n \u2010dependent UI evolved in a common ancestor to\n S. pennellii<\/jats:italic>\n and\n S. habrochaites.<\/jats:italic>\n Within\n S. habrochaites, fps2<\/jats:italic>\n pollen rejection was observed mainly in SI or mixed mating populations, suggesting an association with outcrossing. Triple mutants of\n S. pennellii<\/jats:italic>\n and\n S. habrochaites<\/jats:italic>\n lacking functional\n ODC2, HT\u2010A\/\u2010B<\/jats:italic>\n , and\n S\u2010RNase<\/jats:italic>\n are cross\u2010compatible as female parents with\n S. lycopersicum<\/jats:italic>\n , allowing transfer of their cytoplasmic genomes into cultivated tomato.\n <\/jats:p>","DOI":"10.1111\/tpj.70412","type":"journal-article","created":{"date-parts":[[2025,8,21]],"date-time":"2025-08-21T19:29:06Z","timestamp":1755804546000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Genetic interactions and natural variation underlying S\u2010\n RNase<\/scp>\n \u2010independent unilateral incompatibility in\n Solanum<\/i>"],"prefix":"10.1111","volume":"123","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-6078-2812","authenticated-orcid":false,"given":"Xiaoqiong","family":"Qin","sequence":"first","affiliation":[{"name":"Department of Plant Sciences (ms #3) University of California One Shields Ave Davis California 95616 USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sarah","family":"Ng","sequence":"additional","affiliation":[{"name":"Department of Plant Sciences (ms #3) University of California One Shields Ave Davis California 95616 USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Elizabeth","family":"Paul","sequence":"additional","affiliation":[{"name":"Department of Plant Sciences (ms #3) University of California One Shields Ave Davis California 95616 USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0860-5253","authenticated-orcid":false,"given":"Roger T.","family":"Chetelat","sequence":"additional","affiliation":[{"name":"Department of Plant Sciences (ms #3) University of California One Shields Ave Davis California 95616 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