Horticultural Science, 2006 (vol. 33), issue 4
Seven-year orchard performance of eleven new apple cultivars from Holovousy in comparison with some commonly grown ones
J. Blažek, J. Křelinová
Hort. Sci. (Prague), 2006, 33(4):131-139 | DOI: 10.17221/3752-HORTSCI 
In an orchard trial that was established in the spring of 1999 on M 9 rootstock at the spacing of 4 × 1 m, eleven new apple cultivars bred in Holovousy (Angold, Julia, Nabella, Primadela, Produkta, Resista, Rubinstep, Rucla, Selena, Vysočina and Zuzana) were evaluated in comparison with three standard varieties (Gala, Golden Delicious and Jonagold) and another two with resistance to scab (Rosana and Topaz). In the first three years, the incidence of scab and mildew was evaluated under limited chemical protection. In 2000-2005 on each of 10 randomly selected trees of each cultivar, the time of flowering and optimum harvest ripening were recorded, flower...
Effects of different sources of iron, hormones and Agrobacterium tumefaciens on the chlorophyll and iron concentration in the leaves of peach trees
C. Tsipouridis, D. Almaliotis, T. Thomidis, A. Isaakidis
Hort. Sci. (Prague), 2006, 33(4):140-147 | DOI: 10.17221/3753-HORTSCI
The aim of this study was to investigate the effect of different sources of iron, hormones and Agrobacterium tumefaciens in the chlorophyll and iron concentration of the peach cultivars Katerina and Fire Blight. The results showed that the concentration of Fe in the leaves was significantly increased after spraying with FeSO4.7H2O (alone or in combination with KNO3, urea, citric acid or ascorbic acid) or with GA3 + Kinetin. Soil applications with Fe-EDDHA also significantly increased the iron concentration in leaves. Chlorophyll (a/b) increased only in trees sprayed with citric...
Hybrid breeding of cauliflower using self-incompatibility and cytoplasmic male sterility
V. Kučera, V. Chytilová, M. Vyvadilová, M. Klíma
Hort. Sci. (Prague), 2006, 33(4):148-152 | DOI: 10.17221/3754-HORTSCI
Two self-sterility systems, self-incompatibility (SI) and cytoplasmic male sterility (CMS) were used to verify their suitability for hybrid breeding of cauliflower. The possibility of reproduction of SI and CMS lines in isolation cages using insect pollinators were proved. The best results in reproduction of SI lines derived from the cultivar Montano were achieved by spraying with 3% NaCl solution in the evening and using bumblebees as pollinators. The mean weight of seeds per plant attained approximately 5 g. Two CMS lines bred from cultivars Brilant and Fortuna achieved seed set per plant after honeybee pollination with their fertile analogues 0.8...
Study of some characteristics of vegetable pepper varieties
M. Valšíková, J. Králová, Š. Barkoci
Hort. Sci. (Prague), 2006, 33(4):153-157 | DOI: 10.17221/3755-HORTSCI
In three test years an assortment of 15 varieties of vegetable pepper (Capsicum annuum L.) were grown in field conditions to study experimentally some of their morphological and biological properties. Mean plant height ranged from 435.7 mm (cv. Lastočka) to 636.7 mm (cv. Srbská). The smallest fruits had cultivars Čerešňová and Kecskeszarv with the weight of 4.86 g and 17.68 g. Average weight was the highest at varieties Pola kapia (92.23 g) and Melišor (91.92 g). The biggest length of mature leaves over 100 mm was measured at varieties Dolmy, Podarok Moldavy and Tuba; the smallest leaves according to length and width had variety Čerešňová....
Accumulation of flavonoid compounds in flowering shoots of Achillea collina Becker ex. Rchb. Alba during flower development
K. Karlová
Hort. Sci. (Prague), 2006, 33(4):158-162 | DOI: 10.17221/3756-HORTSCI
The objective of this paper was a screening of flavonoid content in Achillea collina Becker ex. Rchb. Alba flowering tops (Herba millefolii) and flowers (Flos millefolii). Ten developmental stages of plant (flowers and tops separately) - from the beginning of flower differentiation to ripe seed stage - were studied. The methanol extract of plant material was used for HPLC analysis. The flavones apigenin, luteolin, and their 7-O-glucosides were found as the main flavonoid constituents in all developmental stages of both flower and top drug. Apigenin and apigenin-7-O-glucoside contents have a similar accumulation tendency during...
Evaluation of BC Williams and PI1/6 pear cultivars for their compatibility with 49 quince genotypes and their susceptibility to fire blight: Short communicaton
T. Thomidis, C. Tsipouridis
Hort. Sci. (Prague), 2006, 33(4):163-166 | DOI: 10.17221/3757-HORTSCI
In this study, the compatibility of the pear cultivars PI1/6 and BC Williams with 49 quince genotypes was evaluated. The results showed that the cv. PI1/6 had a good compatibility with several of the quince genotypes, and the cv. BC Williams only with a few of them. Differences were also found in their susceptibility to fire blight (Erwinia amylovora). The cultivar PI1/6 was very susceptible, while the cultivar BC Williams was relatively tolerant.