Tendril-less2 (TI2) - a gene providing the pea Pisum sativum L with ability to climb

After gamma-ray treatment of pea seeds, a mutation tendril-less2 (tl2) was obtained. In heterozygote, it transforms tendrils into a narrow leaflets, resembling an action of the classic mutation tl. In contrast to tl, the novel mutation, when homozygous, does not affect leaf development but supresses pigmentation of petals. It is suggested that both genes (Tl and TI2), responsible for transformation of leaves into an organ of climbing, have common origin from a gene controlling anthocyanine synthesis