Abstract
Abstract Acetolysed and non-acetolysed pollen grains were examined by means of light and scanning electron microscopy. A short description of the pollen morphology of the parent species Linaria vulgaris and L. repens is presented. The frequency distribution of the P, E and P/E values of these species is shown in comparison with corresponding measurements of pollen grains from induced F1 and F2 individuals. The “species values” of P, E and P/E have an expected normal distribution with short amplitudes. However, plants from the first filial generation of reciprocal crosses have as a rule extreme values widely separated and a bimodal distribution curve of the E values. A new method of wax-mounting of spores or similar objects on a specimen stub for SEM preparation is presented.
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