Table 2.

Effect of the chromosome doubling procedure on plant fertility

Colchicine treatment	Plants	Fertile plants [%]	Fertile plants per 100 embryos	Mean sterile tillers1	Mean fertile tillers2	Mean seeds per fertile tiller3
24 h - 0 mM	65	29.2 a	5.8 ab	0.0 a	5.6 cdef	29.1 bcde
24 h - 0.3 mM	47	27.7 a	5.4 ab	0.4 a	6.9 abcd	33.8 a
24 h - 1 mM	60	50.0 ab	12.5 b	0.5 a	4.5 fg	24.2 e
24 h - 5 mM	35	45.7 ab	8.9 ab	0.3 a	4.9 efg	24.1 cde
48 h - 0 mM	43	32.6 a	6.7 ab	0.7 a	7.7 ab	19.8 bcde
48 h - 0.3 mM	55	50.9 ab	11.7 b	0.9 a	7.0 abc	22.4 bcde
48 h - 1 mM	34	61.8 b	8.8 ab	0.5 a	5.7 defg	33.7 abcd
48 h - 5 mM	6	66.7 ab	3.3 a	0.3 a	7.0 a	26.6 ab
72 h - 0 mM	26	38.5 a	4.8 ab	0.9 a	6.3 abcde	32.0 ab
72 h - 0.3 mM	50	52.0 ab	10.8 ab	0.5 a	5.0 defg	31.3 bcde
72 h - 1 mM	32	59.4 ab	7.9 ab	0.9 b	6.5 abcde	27.4 abc
72 h - 5 mM	32	56.2 ab	6.7 ab	0.2 a	6.3 bcde	36.7 a
in vivo	153	52.3 ab	9.6 ab	2.9 b	3.7 g	31.0 de

¹ mean number of sterile and ² fertile tillers per seed-setting plant, and ³ mean number of seeds per fertile or partially fertile tiller. Means of columns followed by different letters indicate significant differences at the α = 0.05 level.