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We used germination tests to assess the frequency of polyembryony in 9 asparagus cultivars with a high propensity to produce double embryos with different ploidy levels: Alpha, Andreas, Boonlim, Cipres, Eposs, Helios, Limbras, Ravel and Sartaguda. Twin embryos inside a single seed were found in 3 cultivars: Eposs 2n, Ravel 2n and Sartaguda 2n, at 0.60% frequency (15 seeds with twin embryos out of...
The morphological and histological changes which occur in the cold-induced apical meristem of broccoli (B. oleracea var. italica cv. ‘Fiesta’) during transition from the vegetative to the generative phase have been demonstrated in our previous investigations. Now, a light microscopic study on the micromorphological parameters of the tunica and corpus of the meristem was undertaken to ascertain their...
A two–year study on the influence of temperature on broccoli head initiation was carried out at the “Marcelin” experimental station of the Poznań University of Life Sciences. In each year of the study, plants were planted in the field at four dates. The evaluation of the developmental phase of the broccoli shoot apex was based on the analysis of microscope slides. The date of head initiation was assumed...
Parental lines are propagated in vitro in asparagus breeding. Additionally, in order to obtain super males which are needed for breeding all-male hybrids, anther culture is applied. Healthy and viable asparagus parental plants developed from in vitro culture should contain well formed storage roots. There are many factors affecting asparagus rooting. Only with the healthy explant materials, proper...
Fusarium oxysporum, F. proliferatum, F. culmorum, F. heterosporum, and F. solani were detected in asparagus spears. Identification based on morphology of F. proliferatum and F. oxysporum was confirmed by PCR with species-specific primers. The incidence of Fusarium colonization was the highest in the basal epidermal tissue of spears. The studies revealed high levels of MON and low levels of FB1 in...
The studies were carried out in the years 2006–2007 in an unheated glasshouse. Strawberry mother plants cv. ‘Elsanta’ were grown in polypropylene bags filled with peat-based substrate (3 plants per bag). The bags with plants were placed on gutters in the glasshouse at the height of 165 cm. The distance between the gutters was 120 cm. The experiment was established in a split-block design in 4 replications...
Temperature is a factor which strongly affects the yield and broccoli head quality. Temperature determines the date of head initiation and thus affect the length of vegetation period. An experiment the aim of which was to assess the impact of temperature on the yield and the length of the period from the broccoli head initiation until the beginning and end of harvest as well as the length of the harvest...
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