RT article T1 Self-(In)compatibility Systems: Target Traits for Crop-Production, Plant Breeding, and Biotechnology A1 Muñoz-Sanz, Juan V. A1 Zuriaga, Elena A1 Cruz-García, Felipe A1 McClure, Bruce A1 Romero, Carlos K1 Self-(in)compatibility K1 s-genotyping K1 Interspecific reproductive barriers K1 Hybrid breeding K1 F30 Plant genetics and breeding K1 Plant breeding K1 Crop production AB Self-incompatibility (SI) mechanisms prevent self-fertilization in flowering plants based onspecific discrimination between self- and non-self pollen. Since this trait promotes outcrossingand avoids inbreeding it is a widespread mechanism of controlling sexual plant reproduction.Growers and breeders have effectively exploited SI as a tool for manipulating domesticatedcrops for thousands of years. However, only within the past thirty years have studies begun toelucidate the underlying molecular features of SI. The specific S-determinants and somemodifier factors controlling SI have been identified in the sporophytic system exhibited byBrassica species and in the two very distinct gametophytic systems present in Papaveraceaeon one side and in Solanaceae, Rosaceae, and Plantaginaceae on the other. Molecular levelstudies have enabled SI to SC transitions (and vice versa) to be intentionally manipulated usingmarker assisted breeding and targeted approaches based on transgene integration,silencing, and more recently CRISPR knock-out of SI-related factors. These scientificadvances have, in turn, provided a solid basis to implement new crop production andplant breeding practices. Applications of self-(in)compatibility include widely differing objectivessuch as crop yield and quality improvement,marker-assisted breeding through SI genotyping,and development of hybrids for overcoming intra- and interspecific reproductive barriers.Here, we review scientific progress as well as patented applications of SI, and also highlightfuture prospects including further elucidation of SI systems, deepening our understanding ofSI-environment relationships, and new perspectives on plant self/non-self recognition. YR 2020 FD 2020 LK http://hdl.handle.net/20.500.11939/6478 UL http://hdl.handle.net/20.500.11939/6478 LA en NO Muñoz-Sanz, J. V., Zuriaga, E., Cruz-Garcia, F., McClure, B., & Romero, C. (2020). Self-(in) compatibility systems: target traits for crop-production, plant breeding, and biotechnology. Frontiers in Plant Science, 11, 195 DS MINDS@UW RD Jan 21, 2021