Fig. 7

The map showing extensive distribution of most of Chinese Berberis spp. and Mahonia spp. serving as alternate hosts for Puccinia striiformis f. sp. tritici in North-western area of oversummering areas, and a few Berberis spp. for P. graminis f. sp. tritici in Gansu, Shaanxi and Tibet in China based on data collections of field investigations during 2010–2020 (Zhao et al. 2013, 2015, 2016b; Wang et al. 2016; Du et al. 2019; Li et al. 2021; Zhuang et al. 2019; Cheng et al. 2022). Geographic outline of oversummering areas were redraw according to a review by Wan et al. (2007) and Tibet of oversummering area was added. 1 North-western area. 2 South-western area. 3 Xinjiang area. 4 Northern area. 5 Tibet area. Map resource: http://bzdt.ch.mnr.gov.cn/. Data resource: Information on barberry data in Northeast China from Yuanyin Cao’s laboratory at Shenyang Agricultural University, Shenyang, Liaoning Province