A novel heteromorphic phenotype, P*, in Primula× tommasinii differs from long-styled ('pin')
morphs, half the pollen having a size distribution typical of pins and the other half a …

Der Begriff Embryologie umfaßt, soweit es sich um den Bereich der Angiospermen handelt,
nicht nur alle Vorgänge, die bei der Entwicklung eines Embryos aus der Zygote ablaufen …

Asteraceae (synonym as Compositae) is one of the largest angiosperm families among
flowering plants comprising one-tenth of all agri-horticultural species grown across various …

Since only the long-and short-styled forms of Eichhornia azurea (Swartz) Kunth have been
observed by botanists, the species has been considered distylous. Populations containing …

Plantago lanceolata is self-incompatible and gynodioecious, and a knowledge of the
genetics of these two systems may help in understanding why male sterility is present when …

MATERIALS AND METHODS The fertilization ability of pollen grains produced by six maize
single cross hybrids Wf9XH55, Wf9XH50, H 4 9~ H 5 5, H49XH50, Ky49XKy27 (Ky) and …

1. Forty-nine auxotrophic mutants were isolated after irradiation with ultraviolet light. The
biochemical requirements were identified and the response to possible precursors tested in …

Investigations carried out by the Swedish Seed Association on tetraploid rye during the last
ten years are discussed. The average frequency of aneuploids in nine different seed lots of …

Isolates of Peronospora from Brassica and Raphanus were examined to determine their
host ranges and the effect of the host on sporangium morphology. The behaviour of both …

The frequency of polyploidy increases with latitude in the Northern Hemisphere, especially
in deglaciated, recently colonized areas. The cause or causes of this pattern are largely …