Abstract: Beneficial acclimation hypothesis (BAH) predicts that the animals acclimated to a particular temperature can enhance their performance and fitness at that temperature, in comparison with those acclimated to other temperatures. Taking Polyrhachis vicina as test object, this paper studied its locomotive performance under effects of thermal acclimation and performance temperature. The P. vicina adults were divided into two groups and acclimated to 20 ℃ and 30 ℃ for four weeks, respectively, and after then, their pause frequency, sprint speed, and maximum continuous locomotion distance were measured at 20 ℃ and 30 ℃. It was indicated that the acclimation temperature, performance temperature, and their interaction had significant effects on the locomotive performance of P. vicina. The P. vicina adults acclimated to a particular temperature performed better at that temperature than those acclimated to a different temperature, which supported the BAH.

Key words: Rice landrace core collection, Yunnan Province, Relative plant dry weight, Phosphorus deficiency