Fig. 5From: The maintenance of stable yield and high genetic diversity in the agricultural heritage torreya tree systemGene flow and farmer activities. a Gene flow based on Wright [28] among NGT trees at the six sites. b Historical gene flow based on the coalescent theory among NGT trees at the sites. c Flow of pollen and seeds of NGT trees driven by local farmer activities. In a–c: A, B, C, D, E, and F are the sample sites. GT grafted torreya, NGT non-grafted torreyaBack to article page