Plants of original B. napus cv. Vikros and its mutant progeny.

Plants of B. napus cv. Vikros (a1), mutant plants of B. rapa-type (b1) and B. napus-type (c1) at the rosette vegetative growth stage; position and shape of siliqua in B. napus cv. Vikros (a2), in plants of B. rapa-type (b2-1) and B. napus-type (c2); a plant of B. rapa-type with a long hypocotyl (b2-2).