Figure 1 - Regeneration test of three rice varieties.
From the following article
A protocol for Agrobacterium-mediated transformation in rice
Asuka Nishimura, Ikuko Aichi and Makoto Matsuoka
Nature Protocols 1, 2796 - 2802 (2007)
doi:10.1038/nprot.2006.469

(a) A japonica variety, "Nipponbare," that has a high-regeneration frequency. (b) A japonica variety, "Koshihikari," that has a low-regeneration frequency. (c) An indica variety, "Kasalath," that exhibits a high-regeneration frequency.
