Production of viable male unreduced gametes in Brassica interspecific hybrids is genotype specific and stimulated by cold temperatures

Table 5 "Giant" pollen observation in amphidiploid Brassica species.

Genotype	Species	No. of plants	Total viable pollen measured	Giant pollen observed	Giant pollen as a percentage of viable pollen
J1	B. juncea	5	653	1	0.15%
N1	B. napus	2	386	0	0.00%
N2	B. napus	5	1001	0	0.00%
N3	B. napus	3	515	2	0.39%
N4	B. napus	3	885	1	0.11%
N5	B. napus	2	419	0	0.00%
C1	B. carinata	4	279	1	0.36%
C2	B. carinata	5	528	1	0.19%
	Total	29	4666	6	Av: 0.15%

A pollen grain was determined to be "giant" if the minimum diameter of the pollen grain exceeded 1.5 × the mean pollen diameter observed in pollen production by that plant. No significant differences in giant pollen production were observed between genotypes.

ISSN: 1471-2229