Zmienność żywotności pyłku w kwiatach i kwiatostanach astra chińskiego (Callistephus chinensis Nees) wywołana promieniami gamma w pokoleniu M1 i M2 [Variability of pollen viability in the flowers and inflorescences of the China aster (Callistephus chinensis Nees) caused by gamma rays in the M1 and M2 generations]

Abstract

The influence of gamma rays (within range 3-12 kR) on the variations of pollen viability was investigated in four varieties of Callistephus chinensis Nees in the M₁ and M₂ generations. The variability, both in generation M₁and M₂ of the studied character between the plants and flowers within the inflorescence proved to be dependent on the radiation dose and was as a rule higher in populations exposed to radiation than in the control ones. These regularities, however were not equal in the tested varieties. The total variance of pollen viability in the M₂ generation was in general lower as compared with that of the M₁ generation, whereas the particular variance components showed an extremal dependence (minimum after a 3 kR dose) on the radiation dose.