Spatial Variation in Seed Dormancy and Germination of Dodonaea viscose in Yuanmou Dry-hot Valley, China

Abstract:

In order to reveal dormancy character and geographical variation of Dodonaea viscose seeds, the seeds were collected from Liangshan and Zuolin Xiang in Yuanmou Xian, Yunnan Province, and their germination character was studied. The results showed that seeds from two places had physical dormancy, and the germination rate of seeds treated by hot water was significantly (P=0.001) higher than that of untreated seeds. The width, length of seed, ratio of length to width, and 100-seed weight between Liangshan and Zuolin were very close. Besides, the seed germination and seedling growth of D. viscose had no significant differences between Liangshan and Zuolin. Therefore, seeds from Liangshan and Zuolin had no geographical variation, the two places are feasible to seed collection. But seed dormancy should be broken before sowing to improve germination rate.

Key words:Dodonaea viscose;Seed;Dormancy;Variation;Dry-hot valley