COMPARISON OF CHLOROPHYLL FLUORESCENCE KINETICS AND PHOTOCHEMICAL ACTIVITIES OF ISOLATED-CHLOROPLASTS IN GENETIC-ANALYSIS OF LYCOPERSICON-ESCULENTUM MILL. HYBRIDS

In experiments with 5x5 diallel cross of tomato cv. Smrzicke contents of individual chlorophylls (Chl) and carotenoids (Car), Chl fluorescen ce kinetic parameters (F-v/F-m, q(P), q(N) and Phi(II)), activities of photosystem 2 and of the whole electron transport chain (Hill reactio n) were compared during plant ontogeny with the aim to detect genetica lly determined differences among genotypes. The differences in Chl flu orescence kinetic parameters and Hill reaction activities were more af fected by leaf development than by plant genotype, although the differ ences between reciprocal crosses were found in the former ones. Some a dditive genetic effects may participate in the genetic determination o f q(N). Statistically significant non-additive genetic effects in inhe ritance of the total Chl content were found, Detailed pigment analysis revealed additivity together with differences between reciprocal cros ses in individual Car and Chl. The highest general combining ability w as found for the parental line AM.