Table 2. Freezing tolerance of studied wheat and triticale accessions in field-laboratory studies (% survival after freezing).

Sampling date	Winter
	2010/11		2011/12		2012/13
	Wheat	Triticale	Wheat	Triticale	Wheat	Triticale
1 st (early winter)	75.0a	67.3a	30.3b	42.0a	37.1c	77.1a
2 nd (late winter)	9.5d	32.9c	15.0d	23.0c	33.1c	55.1b
Mean	44.4 **	50.1 **	23.4 **	29.9 **	35.1 ***	66.0 ***

Letters indicate homogeneity groups calculated separately for each trait and winter at P = 0.05 (Tukey’s HSD test).

*, **, *** after a mean value denote statistically significant differences between wheat and triticale at P = 0.05, 0.01 and 0.001, respectively.