scholarly journals Hybrids of Solanum corymbiflorum and S. diploconos (Solanaceae) – a hope for new commercial varieties of edible fruits

2021 ◽  
Vol 20 (4) ◽  
pp. 342-347
Author(s):  
Wojciech Maksymilian Szymański ◽  
Iwona Ziółkowska
Keyword(s):  
Fruit Trees ◽  
Wild Relatives ◽  
Point Of View ◽  
Small Tree ◽  
F1 Hybrid ◽  
Hybrid Type ◽  
Disease Resistant ◽  
Commercial Cultivars ◽  
Fruit Plants ◽  
Solanum Betaceum

Solanum diploconos (Mart.) Bohs („guava tamarillo”) and Solanum corymbiflorum (Sendtn.) Bohs („hardy tamarillo”) are wild relatives to subtropical, orchard, small tree – Solanum betaceum Cav. (called simply „tamarillo”). Both these species create edible fruits, but they have not been cultivated widely so far as fruit trees. However, each one of these species has valuable features. Solanum corymbiflorum is quite hardy to frost, deciduous and early blooming both in fenological year time as well as in its lifespan but has untasty fruits. Solanum diploconos has quite good tasting fruits and it is pest and disease resistant. This work has been an attempt to connect their best features in hybrids to create new, potentially commercial cultivars to grow as fruit plants. Three types of hybrids were created: F1 hybrid type – Solanum corymbiflorum × Solanum diploconos, BC1 backrossing type - (Solanum corymbiflorum × Solanum diploconos) × Solanum corymbiflorum and the second BC1 backcrossing type – (Solanum corymbiflorum × Solanum diploconos) × Solanum diploconos. Out of the numerous variable individuals within each type, we selected three very valuable from an agronomic point of view cultivars (Solanum 'Lynn', 'Pinczow Springs' and 'Iwona'). The work with crossing and selecting the next cultivars will be continued.

scholarly journals Susceptibility of European pear genotypes in a gene bank to pear psylla damage and possible exploitation of resistant varieties in organic farming

2010 ◽  
Vol 16 (3) ◽  
Author(s):  
P. Benedek ◽  
T. Szabó ◽  
M. Soltész ◽  
Z. Szabó ◽  
C. Konrád-Németh
Keyword(s):  
Organic Farming ◽  
Fruit Quality ◽  
Gene Bank ◽  
Point Of View ◽  
Local Varieties ◽  
European Pear ◽  
Pear Psylla ◽  
Resistant Varieties ◽  
Commercial Cultivars ◽  
Yield Capacity

We evaluated 285 pear genotypes (commercial cultivars, ancient local varieties, unnamed local strains, seedlings, wild seedlings) in the largest gene bank of pear in Hungary from the point of view of psylla resistance to explore their possible exploitation in organic farming. We have found some 10 new resistant types (Bókoló körte, Bôtermô Kálmán, Füge alakú körte, Nagyasszony körte, Nyári Kálmán, Rozs nyári körte, Viki körte, Pb-242, Pb-299, 0-632) and 7 highly tolerant ones (Cure-6, Kései Kálmán, Kieffer, Kieffer Éd, Steiner, Téli Kálmán, II. B-3- 6/4, 96-16/5) (Table 1). These made up 3.5 + 2.8 per cent of the investigated genotypes, while 93.7 per cent of them were susceptible to pear psylla damage. Taking earlier and present results into account we can list more than 30 European pear cultivars being resistant or highly tolerant to pear psylla infestation and damage. In fact, the list of resistant and highly tolerant cultivars may serve as a basis selecting pear cultivars fitting to the specific requirements of the organic farming. By the end we can conclude that there is some real hope to exploit some resistant or highly tolerant ancient or local cultivars in organic farming but further investigations are needed to estimate their yield capacity and fruit quality.

STUDY THE DIMENSION-MASS CHARACTERISTICS OF ONION OF “HERCULES F1” HYBRID

2016 ◽  
Vol 11 (2) ◽  
pp. 5-9 ◽  
Author(s):  
Аксенов ◽  
Aleksandr Aksenov ◽  
Сибирев ◽  
Aleksey Sibirev
Keyword(s):  
Point Of View ◽  
F1 Hybrid

The article was shown the results of the study of dimension-mass characteristics of “Hercules F1” onion hybrid from the point of view of perspective machine working units creation for its cultivation and harvesting. The results of previous studies of other varieties of onions were considered. The technique and equipment, used in research, was described. The results of this study are presented in the form of a histogram distribution, the analysis of studies carried out by the method of variation statistics.

scholarly journals The INFLUENCE OF TEMPERATURE AND FUNGAL COMMUNITY ON GROWTH AND SPORULATION OF Diaporthe FROM FRUIT PLANTS

2020 ◽  
Vol 19 (5) ◽  
pp. 71-79
Author(s):  
Barbara Anna Abramczyk ◽  
Ewa Dorota Król ◽  
Ewa Dorota Zalewska ◽  
Beata Zimowska
Keyword(s):  
Vegetative Growth ◽  
Growth And Development ◽  
Pathogenic Fungus ◽  
Extreme Temperature ◽  
Fruit Trees ◽  
Climatic Conditions ◽  
Effect Of Temperature ◽  
Influence Of Temperature ◽  
Fruit Plants

The purpose of this experiment was to determine the influence of temperature and fungi colonizing fruit plants on Diaporthe, a pathogenic fungus in Poland. The biotic series method was used to test in vitro the effects of the fungi colonizing fruit trees on isolates of Diaporthe. Among the 13 fungal species tested, six inhibited the growth and development of Diaporthe; while another two species were neutral and the rest showed the lack of limiting impact in relation to the pathogen. Fungi present in the shoots of fruit plants was able to limit the growth and development of Diaporthe spp., both in chemically-protected and non-protected orchards. Studies on the effect of temperature indicated that the optimum temperature for vegetative growth of isolates of Diaporthe ranged from 20°C to 30°C, and for conidial sporulation from 25°C to 30°C. However, the ability of Diaporthe sp. to survive at extreme temperature (–20°C and +35°C) enables their vegetative growth in climatic conditions worldwide.

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