Preliminary evaluation results of new plum cultivars in a dense planting

Abstract

ABstrAct:Sixteen new plum cultivars mostly bred in Germany were tested together with several standards in a high density experimental orchard established at Holovousy in the spring of 2004 with spacing 5 × 1.5 m. Trees were trained as spindles on St. Julian A rootstock. In the orchard the following characteristics were evaluated: tree vigour based upon measuring of trunk-cross section area and canopy volume, yields, time of flowering, time of fruit ripening and basic parameters of fruit quality. The highest yields and precocity of fruiting were recorded on cultivars Tophit, Jojo, Elena, and President, whereas the least productive were Ruth Gerstetter, Anna Späth, and Topgigant Plus. Cultivars Katinka, Jojo, Topper, and Empress had the highest values of yield efficiency whilst the lowest ones were recorded on Topgigant Plus and Anna Späth. All evaluated cultivars were characterized by mean start of fruit ripening and length of harvest period. Topgigant Plus had the largest fruits (mean 75.9 g) followed by Bluefre, Empress and Tophit, whereas the smallest ones were recorded in Katinka, Gabrovská and Valjevka. The highest scores for fruit quality were given to Hanita, Tophit and Presenta. New cultivar Tophit was the most remarkable regarding all evaluated characteristics including its time of ripening that would prolong the season of commercially grown fresh fruit cultivars for use in the Czech Republic.

Growth, fruit size, yield performance and micronutrient status of plum trees (Prunus domestica L.)

“…Our YH for this cultivar was higher than those obtained by Meland (2005), but in the sixth year after planting. In general, our data for YT, YH and YE are similar to those published by Halapija-Kazija et al (2009) and with similar group of plum cultivars and inferior to the results obtained by Blažek and Pištěková (2009). Low values of YE and high TCSA values showed that Belošljiva rootstock in our study influenced relatively high vigour.…”

“…Mean FW and its variation recorded in this trial corresponded quite well to data observed in literature (Halapija-Kazija et al 2009). A greater disagreement in comparison to published data could be stated in BLU that should have possessed very large fruits, sometimes reaching weights up to 70 g (Blažek and Pištěková 2009). This result indicated that some plum cultivars on Belosljiva had the tendency to the decrease mean FW, particulary on sandy-loam soils, in accordance with the studies undertaken by Grzyb et al (1998).…”

“…On the contrary, the smallest mean FW belonged to ČRO, OPA and AGE. All reminding cultivars could be classified like plums with medium fruit size (Blažek and Pištěková 2009), except ČRA and ČNA. These cultivars could be classified as large fruits cultivars on the basis of summarized results (Blažek et al 2004).…”

Plum cultivars Zlatka and Pozna Plava (Prunus domestica L.) bred at the Fruit Research Institute in Čačak

“…Pozna Plava stands out due to its late ripening time and long process of fruit ripening. Apart from the production purposes, this cultivar has a potential significance in the future projects of plum selection, since the ripening time is one of the well-known genotype-specific characteristics (García-Mariño et al 2008) and a long harvest period occurs as a result of a cultivar's specific ability to maintain the corresponding firmness of the flesh (Blažek, Pišteková 2009). Vol.…”

Selection of Prune (<i>Prunus domestica</i> L.) Cultivars Suitable for the East Asian Temperate Monsoon Climate: Ripening Characteristics and Fruit Qualities of Certain Prunes in a Warm Southwest Region of Japan

“…The 4 mid-to late-ripening cultivars we used, 'Stanley', 'Valor', 'President', and 'Marjorie's Seedling', are known to provide high yield (Agriculture and Horticulture Development Board, 2009;Blažek and Pištěková, 2009;Butac et al, 2012;Markuszewski and Kopytowski, 2013;Milosevic et al, 2010). Although the yield in Izumo was low for early-ripening cultivars ('Puchull', 'Purple Ais', and 'Blue Tan'), other countries reported high yields with early-ripening cultivars (Blažek and Pištěková, 2009;Embree et al, 1999).…”