Seed sources
Code
Altitude /m Longitude /°E Latitude /°N Annual average temperature /℃
January average/℃
July average /℃ Annual precipitation /mm Frost-free season /d
Sample number
Taian, Shandong STA 219 117°15′ 36°12′ 12.9 -2.6 26.4 697 195 9
Jinan, Shandong SJN 43 116°77′ 36°68′ 13.6 -3.2 27.2 614 235 15
Haiyang, Shandong SHY 140 120°89′ 36°63′ 12.0 -0.6 23.5 696 207 5
Yiyuan, Shandong SYY 400 117°92′ 35°89′ 13.6 -0.5 26.5 730 198 7
Zaozhuang, Shandong SZZ 184 116°98′ 34°73′ 13.5 -0.2 26.7 875 196 2
Sishui, Shandong SSS 169 117°20′ 35°38′ 13.4 -0.2 27.3 755 200 10
Xian, Shannxi SXA 425 108°45′ 33°94′ 13.4 -0.6 26.5 621 226 6
Xuzhou, Jiangsu JXZ 28.8 117°31′ 34°01′ 14.0 2.8 28.2 865 210 7
Wuhu, Anhui AWH 10 117°92′ 30°77′ 15.5 3.0 28.9 1200 230 9