Template-Type: ReDIF-Article 1.0 Author-Name: J. Blažek Author-Workplace-Name: Research and Breeding Institute of Pomology Holovousy Ltd., Holovousy, Czech Republic Author-Name: F. Paprštein Author-Workplace-Name: Research and Breeding Institute of Pomology Holovousy Ltd., Holovousy, Czech Republic Author-Name: L. Zelený Author-Workplace-Name: Research and Breeding Institute of Pomology Holovousy Ltd., Holovousy, Czech Republic Author-Name: J. Křelinová Author-Workplace-Name: Research and Breeding Institute of Pomology Holovousy Ltd., Holovousy, Czech Republic Title: Results of public tastings of apple novelties at the end of the storage seasons during the last 10 years Abstract: From a total number of 62 apple samples included in this study, 42 cultivars or selections were evaluated after storing in standard conditions, and the remaining 20 in ultra low oxygen (ULO) storing conditions. The top leader regarding total taste quality was cv. Meteor, which obtained the highest total scoring value, and also in the mean sequence it was the number one cultivar. In the following position with regard to the total fruit quality was cv. King Jonagold. In a decreasing sequence of total fruit quality, the cultivars were classified in the following order: Rosabel, Andera, Angold, Berta and Meteor stored in ULO. In the case of fruit taste alone, Gold Bohemia was the total leader. Followed by cvs Rubinola and Andera. Regarding the character of the taste, cv. King Jonagold was relatively the sweetest, closely followed by cvs Pinova and Goldstar. On the opposite spectrum, with relatively the most acidic taste, were cvs Jonagold, Topaz and Rubin, all of which were stored in ULO conditions. Regarding fruit appearance cv. Melrose was evaluated as the most attractive looking apple. It was followed in this characteristic by the novelty cv. HL 212. Next in sequence were cvs Šampion (ULO), Benet, Gala Must (ULO), Angold and Andera. Keywords: apples, cultivars, public tasting, fruit quality, fruit appearance, cultivar assessing Journal: Horticultural Science Pages: 53-60 Volume: 42 Issue: 2 Year: 2015 DOI: 10.17221/232/2014-HORTSCI File-URL: http://hortsci.agriculturejournals.cz/doi/10.17221/232/2014-HORTSCI.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/hor-201502-0001.txt Handle: RePEc:caa:jnlhor:v:42:y:2015:i:2:id:232-2014-HORTSCI Template-Type: ReDIF-Article 1.0 Author-Name: S. Gianní Author-Workplace-Name: Department of Agricultural and Forest Sciences, University of Palermo, Palermo, Italy Author-Name: F. Sottile Author-Workplace-Name: Department of Agricultural and Forest Sciences, University of Palermo, Palermo, Italy Title: In vitro storage of plum germplasm by slow growth Abstract: In this study, in vitro slow growth storage was investigated in four cultivars of two Sicilian (Southern Italy) plum species (Prunus domestica L. and Prunus cerasifera Ehrh. - two genotypes each). Established shoot cultures were preserved at 4°C in the dark in a Murashige and Skoog basal medium containing one of two different concentrations of sucrose (20 and 30 g/l) and with or without growth regulators. We tested the effects of cold storage, genotype and media on survival and re-growth capacity of explants after 3, 6, 9 and 12 months of storage. Effective minimal growth under cold conditions occurred in all four genotypes. The media composition did not affect survival, which, instead, appeared to be genotype-dependent. P. domestica genotypes survived cold storage the longest, for 12 and 9 months; instead, P. cerasifera ones remained viable for up to 6 months. All genotypes retained proliferation capacity under standard conditions and their re-growth capacity seems to be strongly genotype-dependent, closely related to their individual performance in response to the experimental condition of storage. Keywords: genotype, in vitro preservation, plant genetic resources, Prunus Journal: Horticultural Science Pages: 61-69 Volume: 42 Issue: 2 Year: 2015 DOI: 10.17221/186/2014-HORTSCI File-URL: http://hortsci.agriculturejournals.cz/doi/10.17221/186/2014-HORTSCI.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/hor-201502-0002.txt Handle: RePEc:caa:jnlhor:v:42:y:2015:i:2:id:186-2014-HORTSCI Template-Type: ReDIF-Article 1.0 Author-Name: M. Szymajda Author-Workplace-Name: Department of Breeding of Horticultural Crops, Research Institute of Horticulture, Skierniewice, Poland Author-Name: B. Napiórkowska Author-Workplace-Name: Department of Breeding of Horticultural Crops, Research Institute of Horticulture, Skierniewice, Poland Author-Name: M. Korbin Author-Workplace-Name: Department of Breeding of Horticultural Crops, Research Institute of Horticulture, Skierniewice, Poland Author-Name: E. Żurawicz Author-Workplace-Name: Department of Breeding of Horticultural Crops, Research Institute of Horticulture, Skierniewice, Poland Title: Studies on the interspecific crossing compatibility among three Prunus species and their hybrids Abstract: In 2011-2013, a study on the crossing compatibility and the setting of fruit in distant hybridization within the genus Prunus, among the species P. armeniaca L. (apricot), P. salicina Lindl. (Japanese plum), P. cerasifera Ehrh. (myrobalan plum) and the hybrids P. salicina × P. cerasifera was conducted at the Institute of Horticulture in Skierniewice, Poland. The percentage of fruit set depended on the direction of pollination of the crossed species. Most fruits were obtained by crossing P. salicina × P. armeniaca and P. salicina × P. cerasifera. The largest number of fruitlets in relation to the number of pollinated flowers was obtained when two genotypes of P. salicina - Czernuszka and D 17-73, were the maternal parents. The results show that the crossing compatibility and effectiveness in the cross-breeding of the studied species of Prunus are influenced to a greater extent by the genotype of the maternal form of P. salicina than by the genotype of the paternal form of P. armeniaca and P. cerasifera. Keywords: Prunus, distant hybridization, breeding, pollen germination, fruit set Journal: Horticultural Science Pages: 70-82 Volume: 42 Issue: 2 Year: 2015 DOI: 10.17221/273/2014-HORTSCI File-URL: http://hortsci.agriculturejournals.cz/doi/10.17221/273/2014-HORTSCI.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/hor-201502-0003.txt Handle: RePEc:caa:jnlhor:v:42:y:2015:i:2:id:273-2014-HORTSCI Template-Type: ReDIF-Article 1.0 Author-Name: L. Sieczko Author-Workplace-Name: Department of Experimental Design and Bioinformatics, Warsaw University of Life Sciences, Warsaw, Poland Author-Name: A. Masny Author-Workplace-Name: Department of Breeding of Horticultural Crops, Research Institute of Horticulture, Skierniewice, Poland Author-Name: K. Pruski Author-Workplace-Name: Department of Plant and Animal Sciences, Dalhousie University, Truro, Canada Author-Name: E. Żurawicz Author-Workplace-Name: Department of Breeding of Horticultural Crops, Research Institute of Horticulture, Skierniewice, Poland Author-Name: W. Mądry Author-Workplace-Name: Department of Experimental Design and Bioinformatics, Warsaw University of Life Sciences, Warsaw, Poland Title: Multivariate assessment of cultivars' biodiversity among the Polish strawberry core collection Abstract: The diversity of parental genotypes has a major impact on the progress of plant breeding. This study assessed phenotypic biodiversity of 91 strawberry genotypes in the core collection of the Research Institute of Horticulture in Skierniewice, Poland, using multivariate statistical methods. The assessment was carried out from 2008 through 2010 for 13 traits describing plant growth vigour, flowering and fruit ripening times, fruit yield, fruit appearance and quality (position of the calyx in relation to the surface of the fruit, fruit size and firmness, skin and flesh colour, fruit glossiness, intensity of the fruit's aroma and sweetness), as well as the genotypes' capacity for repeat-fruiting during the summer-autumn period. A principal component analysis using a hierarchical cluster analysis reduced the number of dimensions of more than a dozen traits describing the diversity of the assessed cultivars and identified six homogeneous groups, each consisting of cultivars with similar traits; this will simplify mate selection in the hybridization program and may reduce the size of the core collection. Keywords: Fragaria × ananassa, cluster analysis, parental forms, principal component analysis (PCA), strawberry breeding Journal: Horticultural Science Pages: 83-93 Volume: 42 Issue: 2 Year: 2015 DOI: 10.17221/123/2014-HORTSCI File-URL: http://hortsci.agriculturejournals.cz/doi/10.17221/123/2014-HORTSCI.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/hor-201502-0004.txt Handle: RePEc:caa:jnlhor:v:42:y:2015:i:2:id:123-2014-HORTSCI Template-Type: ReDIF-Article 1.0 Author-Name: G.D. Liu Author-Workplace-Name: Horticultural Sciences Department, IFAS, University of Florida, Gainesville, USA Author-Name: K. Morgan Author-Workplace-Name: Soil and Water Science Department, Southwest Florida Research and Education Center, IFAS, University of Florida, Immokalee, USA Author-Name: B. Hogue Author-Workplace-Name: Horticultural Sciences Department, IFAS, University of Florida, Gainesville, USA Author-Name: Y.C. Li Author-Workplace-Name: Soil and Water Science Department, Tropical Research and Education Center, IFAS, University of Florida, Homestead, USA Author-Name: D. Sui Author-Workplace-Name: Palm Beach County Cooperative Extension, IFAS, University of Florida, West Palm Beach, USA Title: Improving phosphorus use efficiency for snap bean production by optimizing application rate Abstract: Phosphorus (P) is essential for crop production. Adequate application P rate is critical for enhancing productivity and profitability of snap bean (Phaseolus vulgaris L.). The goal of this study was to optimize P application rate for commercial snap bean production in south Florida. Six trials were conducted on sandy soils and muck soils in Hendry County and Palm Beach County, Florida, USA. Before planting cv. Caprice snap bean, plots were fertilized with different P application rates in the form of triple superphosphate (0-45-0). An increase in P2O5 application rates up to 134 kg/ha P2O5 significantly increased the marketable bean yields. However, beyond that point, significant field gains did not occur with further increased application. At 134 kg/ha P2O5, bean appearance quality was the best compared to the other treatments. These results indicate that 134 kg/ha P2O5 produced best bean appearance quality and was the optimum rate for commercial production of snap bean in high-pH soils in south Florida. Keywords: Phaseolus vulgaris, optimum phosphorus rate, productivity, marketable bean yields, bean appearance quality Journal: Horticultural Science Pages: 94-101 Volume: 42 Issue: 2 Year: 2015 DOI: 10.17221/229/2014-HORTSCI File-URL: http://hortsci.agriculturejournals.cz/doi/10.17221/229/2014-HORTSCI.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/hor-201502-0005.txt Handle: RePEc:caa:jnlhor:v:42:y:2015:i:2:id:229-2014-HORTSCI Template-Type: ReDIF-Article 1.0 Author-Name: F. Paprštein Author-Workplace-Name: Research and Breeding Institute of Pomology Holovousy Ltd., Hořice, Czech Republic Author-Name: J. Sedlák Author-Workplace-Name: Research and Breeding Institute of Pomology Holovousy Ltd., Hořice, Czech Republic Title: In vitro multiplication of lingonberry - Short Communication Abstract: Although plants of Vaccinium genus have not been cultivated on a large scale in the Czech Republic, there is a potential for commercial lingonberry production in some mountain regions. The purpose of this study was to develop an efficient in vitro system for a quick multiplication of lingonberry cvs Koralle, Linnea, and Runo Bielawskie. McCown woody plant medium (WPM), Anderson's rhododendron medium (AN) and half-strength Murashige and Skoog medium (half-MS) containing cytokinin zeatin in concentrations 0.5, 1 or 2 mg/l were tested for repeated subcultures. The number of newly formed shoots varied with the cultivar, medium tested and concentration of zeatin. Across all experiments, the highest multiplication rate (8.9 ± 0.6) was obtained for cv. Runo Bielawskie on WPM medium with the highest concentration 2 mg/l of zeatin. The lowest multiplication rates 1.1 ± 0.0 were noted on half-MS medium with the lowest concentration of zeatin (0.5 mg/l). In conclusion, micropropagation techniques described in this paper increased multiplication mainly in lingonberry cv. Runo Bielawskie on WPM medium. However, some cultivars of lingonberry would still require further research to optimize proliferation media. Keywords: explant, Vaccinium vitis-idaea, zeatin, sterilization, medium Journal: Horticultural Science Pages: 102-106 Volume: 42 Issue: 2 Year: 2015 DOI: 10.17221/178/2014-HORTSCI File-URL: http://hortsci.agriculturejournals.cz/doi/10.17221/178/2014-HORTSCI.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/hor-201502-0006.txt Handle: RePEc:caa:jnlhor:v:42:y:2015:i:2:id:178-2014-HORTSCI