Objective As a defensive vernacular architecture nurtured within a specific historical period and geographical context， Fujian Tubao functions as a repository and pivotal vehicle for the transmission and evolution of Fujian''s regional cultural heritage.Method Based on the framework of landscape gene theory， 81 Tubao structures in Datian County were taken as research samples. The "Min-DT-M/I-XXXXXXXX" coding structure was constructed through the application of typological analysis and hierarchical coding methods and the landscape gene lineage was generated and the landscape gene map was drawn.Result Key gene prototypes， including five siting patterns， four plan forms and seven defense facilities among others were extracted from Datian Tubao， and a typical Tubao landscape gene map was created.Conclusion The research results have achieved for the first time the digital coding and visual expression of the landscape genes of Fujian Tubao， providing scientific support for the precise protection of cultural heritage and the inheritance of cultural context in rural revitalization and laying the foundation for the subsequent construction of a dynamic database of regional landscape genes.