| Abstract: | In reciprocal crosses between Pelargonium zonale and Pelargonium inquinans uniformly green, uniformly bleached and variegated plants occurred among the F1 progeny. The effect has been described as hybrid variegation and also as hybrid bleaching. Because of the differences among the reciprocal crosses, it is assumed that the zonale-plastids undergo normal development in hybrids, while the plastids of Pelargonium inquinans do not develop normally due to their interaction with the nucleus of the hybrid. Using the results obtained in the experiments, the development of zonale-hybrids from Pelargonium is discussed. |
