Spatiogenetic characterization of S receptor kinase (SRK) alleles in naturalized populations of Raphanus sativus L. var. raphanistroides on Yakushima island

Research on Yakushima Island reveals high diversity of S receptor kinase (SRK) alleles in naturalized radish populations, with four novel alleles potentially unique to the island. The study mapped allele distribution and found evidence of pollen exchange among nearby plants, suggesting gene flow within these populations. While most alleles matched those in cultivated radishes, sequence diversity hindered PCR amplification, mirroring challenges seen in cultivars. This work highlights the dynamic genetic structure of naturalized plant populations and introduces a methodology applicable to other self-incompatible species.

Fukushima, K., Kanomata, T., Kon, A., Masuko-Suzuki, H., Ito, K., Ogata, S., Takada, Y., Komatsubara, Y., Nakamura, T., Watanabe, T., Koizumi, S., Sanuki, H., Park, J.-I., Niikura, S., Suwabe, K., Fujii, S., Murase, K., Takayama, S., Suzuki, G., & Watanabe, M. (2021). Spatiogenetic characterization of S receptor kinase (SRK) alleles in naturalized populations of Raphanus sativus L. var. raphanistroides on Yakushima island. Genes & Genetic Systems, 96(3), 129–139. https://doi.org/10.1266/ggs.20-00066