Folia Horticulturae

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Changes in quality of red beet cultivars with growing time

Barbara Michalik*, Ewa Żukowska**, Stanisława Ślęczek*

**Department of Genetics, Plant Breeding and Seed Production
**Faculty of Horticulture, Agricultural University
**29 Listopada 54, 31-425 Kraków, Poland
**PHRO (Plant Breeding Co.) Krzeszowice
**Szarych Szeregów 3, 32-065 Krzeszowice, Poland

Seven red beet cultivars were examined in the years 1991-1993. The seed was sown in May and roots were harvested after 100, 120, and 140 days of growth. The content of pigments, soluble solids, dry matter, and total sugars were analysed. All the tested cultivars, except cv. Egipski, produced round roots. The length and diameter of the roots increased from 3.5-5 cm after 100 days to 6.0-7.0 cm after 120 days of vegetation. The increase in root size was much less between 120 and 140 days of growth. Cv. Okrągły Ciemnoczerwony was classified as early, DZE 1 F1, DZE 3 F1, Crosby, and Czerwona Kula, as mid-early, Glob F1 as mid-late, and Egipski as late. The nutritional value of the red beets depended predominantly on the genetic characteristics of the cultivar and the weather conditions. The lengthened vegetation period (over 100 days) caused only a certain increase in yellow pigment content. Distinct differences in the content of examined compounds were found between cultivars. Crosby showed the highest red and yellow pigment content, while Okrągły Ciemnoczerwony reached the highest dry matter and sugar content with a comparatively high pigment content. The nutritional value of Glob F1, the best of the tested F1 hybrids, was similar to Czerwona Kula.

Michalik B., Żukowska E., Ślęczek S., 1995. Changes in quality of red beet cultivars with growing time. Folia Horticulturae 7/1: 127-136.