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VCRB :: Contents of Volume 51/1999 :: Detailed information


DYNAMICS AND STRUCTURE OF SPRING AND AUTUMNAL CROPPING OF GLASSHOUSE TOMATO PLANTS BEING RAISED TRADITIONALLY AND IN VITRO

Krystyna GÓRECKA, Dorota KRZYŻANOWSKA, Ryszard GÓRECKI, Teresa GLAPŚ
Research Institute of Vegetable Crops, Konstytycji 3 Maja 1/3, 96-100 Skierniewice, Poland


Summary

Tomato plants of Perkoz F1 cultivar raised in three manners have been evaluated as to their crop and its structure. Control plants were obtained from seeds (object 1), the remaining plants - either by decapitation of sterile seedlings grown on Murashige-Skoog (1962) medium MS without hormones (after Fari et al. 1991,1992) or by multiplication from fragments of leaves and shoots grown on MS medium supplemented with IAA 0.2 mg.l-1 and BA 2 mg.l-1 (after Gorecka & Krzyzanowska 1991,1993) (objects 2 and 3, respectively). Early yield in spring cultivation of plants raised from leaves and shoot pieces on MS medium with IAA and BA was higher than that of control plants. The begin of cropping in plants obtained in vitro by both methods (objects 2 and 3), and cultivated in autumn took place 2 weeks earlier than in controls from seeds. In both growing periods the highest total and marketable yields were obtained from object 3 in vitro cultures, i.e. plants coming from fragments of leaves and shoots. No statistically significant differences in cropping have been stated between plants raised on MS medium without hormones by means of decapitation of sterile seedlings (object 2) and control plants. From in vitro plants belonging to objects 2 and 3, and coming from the spring crop, higher yields of I-st class fruits were harvested than in control. Regardless of the growing period, neither between mean weights of I A and I B fruit classes nor between total yields of particular objects, distinct differences have been observed.

keywords:tomato, tissue culture, yield, micropropagation

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