RESULTS OF POLLINATION AND FRUIT SET INCOMPATIBILITY STUDIES IN SOME ROMANIAN SWEET CHERRY VARIETIES

2008 ◽  
pp. 153-158
Author(s):  
S. Budan ◽  
G. Gradinariu ◽  
A.N. Popescu
Keyword(s):  
Sweet Cherry ◽  
Fruit Set

Fruit set and quality responses to artificial spur extinction in planar cordon sweet cherry trees

2020 ◽  
pp. 507-516
Author(s):  
J. Stanley ◽  
C. Scofield ◽  
M. Schurmann ◽  
R. Marshall ◽  
M. Wohlers ◽  
...  
Keyword(s):  
Sweet Cherry ◽  
Fruit Set ◽  
Cherry Trees

FRUIT SET OF SWEET CHERRY 'GOMILICKA' IS INFLUENCED BY POLLEN DONOR GENOTYPE

2014 ◽  
pp. 65-69
Author(s):  
M. Radunić ◽  
S. Goreta Ban ◽  
G. Vuletin Selak ◽  
A. Jazbec ◽  
Z. Čmelik
Keyword(s):  
Sweet Cherry ◽  
Fruit Set ◽  
Pollen Donor ◽  
Donor Genotype

scholarly journals Examination of the Suitability of Different Pollinators for Four Sweet Cherry Cultivars Commonly Grown in Poland

2014 ◽  
Vol 22 (1) ◽  
pp. 85-91 ◽  
Author(s):  
Agnieszka Głowacka ◽  
Elżbieta Rozpára
Keyword(s):  
Flowering Time ◽  
Good Yield ◽  
Sweet Cherry ◽  
Fruit Set ◽  
Satisfactory Yield ◽  
Economic Significance ◽  
Fruit Setting ◽  
Sweet Cherry Cultivars

AbstractThe aim of the work was to select pollinators for sweet cherry cultivars: ‘Vanda’, ‘Techlovan’, ‘Syl–via’ and ‘Regina’, which are of great economic significance in Poland. As pollinators, three or four different cultivars with the same or similar flowering time as the pollinated cultivars were evaluated annually. The pollinators belonged to different incompatibility groups. Pollination was carried out over four consecutive seasons. Assuming that for a good yield more than 20% of the flowers should develop fruits, a good polli–nator for the cv. ‘Vanda’ was ‘Techlovan’, and for the cv. ‘Regina’ - ‘Sylvia’. The cv. ‘Techlovan’ was pollinated to best effect by ‘Vega’, and the cv. ‘Sylvia’ by ‘Regina’, but the setting of fruits in the last two combinations was moderately good. Low to moderately good fruit setting but depending on the year was observed in the combinations ‘Sylvia’ x ‘Summit’, ‘Regina’ x ‘Summit’, and ‘Regina’ x ‘Rainier’. Cultivar ‘Summit’ for ‘Sylvia’, and ‘Summit’ and ‘Rainier’ for the cv. ‘Regina’ should not be used as pollinators because the low percentage of fruit set obtained annually does not guarantee a satisfactory yield.

scholarly journals Regulating Budbreak, Flowering, and Fruit Maturity in Sweet Cherry (Prunus avium L.) cv. `Bing' by Surfactant and Nitrate Applications

HortScience ◽  
1996 ◽  
Vol 31 (4) ◽  
pp. 603e-603
Author(s):  
K.G. Weis ◽  
S.M. Southwick ◽  
J.T. Yeager ◽  
W.W. Coates ◽  
Michael E. Rupert
Keyword(s):  
Sweet Cherry ◽  
Prunus Avium ◽  
Fruit Set ◽  
Fruit Size ◽  
Calcium Nitrate ◽  
Potassium Nitrate ◽  
Fruit Weight ◽  
Full Bloom ◽  
Fruit Maturity ◽  
Flower And Fruit Development

The years 1995 and 1996 were low chill years in California with respect to stone fruit dormancy. Advancing reproductive budbreak and flowering was accomplished in `Bing' cherry (Prunus avium) by single-spray treatments of a surfactant {a polymeric alkoxylated fatty amine [N,N-bis 2-(omega-hydroxypolyoxyethylene/polyoxypropylene) ethyl alkylamine]} and potassium nitrate in combination when applied at “tightbud,” ≈ 42 days (1 Feb. 1995) before full bloom and with surfactant and potassium nitrate in combination when 10% green calyx was apparent, 33 days before full bloom. Applying 2% surfactant (v/v) + 6% potassium nitrate (w/v) was most effective in advancing bloom, speeding progression through bloom, and advancing fruit maturity when applied at tightbud stage. Surfactant (2% or 4%) applied with 25% or 35% calcium nitrate (w/v) on 2 Feb. 1996 significantly advanced full bloom compared to nontreated controls. Fruit maturity (1995) was somewhat advanced by surfactant–nitrate treatments, but fruit set and final fruit weight were equivalent among treatments. No phytotoxicity was noted in foliage or fruit. In California, marginal and insufficient winter chilling often causes irregular, extended, or delayed bloom periods, resulting in poor bloom-overlap with pollenizers. As a result, flower and fruit development may be so variable as to have small, green and ripe fruit on the same tree, making harvest more time consuming and costly. Data indicate that this surfactant, in combination with a nitrogenous compound, has potential to advance reproductive budbreak and advance maturity in sweet cherry without reducing fruit set or fruit size. Advancing the ripening time of sweet cherry even 2 to 3 days can increase the price received per 8.2-kg box by $10 to $20.

scholarly journals Assessment of self-(in) compatibility in some sweet cherry (Prunus avium L.) genotypes

Genetika ◽  
2013 ◽  
Vol 45 (3) ◽  
pp. 939-952 ◽  
Author(s):  
Sanja Radicevic ◽  
Sladjana Maric ◽  
Radosav Cerovic ◽  
Milena Djordjevic
Keyword(s):  
Growth Rate ◽  
Pollen Tube ◽  
Pollen Tube Growth ◽  
Sweet Cherry ◽  
Prunus Avium ◽  
Fruit Set ◽  
Pollen Tubes ◽  
Pollen Tube Growth Rate ◽  
Prunus Avium L

The paper presents results of a three-year study of self-(in)compatibility in four economically important sweet cherry genotypes - ?Karina?, ?Kordia?, ?Regina? and ?Summit?, under agro-environmental conditions of Western Serbia. Determination of S-RNase genotype, microscopic observation of the pollen tube growth rate and assaying of the fruit set level after self-pollination were used to assess the genotypes. ?Kordia? (S3S6), ?Regina? (S1S3) and ?Summit? (S1S2) are self-incompatible genotypes, with a considerable number of pollen tubes ending the growth in the middle third of the style and lack of fruit set. ?Karina?, as S3S4 genotype, behaved as self-compatible, since its pollen tubes reached the base of the style and ovary, penetrating the nucellus. In addition, fruit set for ?Karina? was recorded in all three years of study (40.26%, 18.79% and 21.81%, respectively).

scholarly journals Plant Growth Regulators Modify Fruit Set, Fruit Quality, and Return Bloom in Sweet Cherry

HortScience ◽  
2021 ◽  
pp. 1-10
Author(s):  
Irfan Ali Sabir ◽  
Xunju Liu ◽  
Songtao Jiu ◽  
Matthew Whiting ◽  
Caixi Zhang
Keyword(s):  
Plant Growth ◽  
Plant Growth Regulators ◽  
Growth Regulators ◽  
Fruit Quality ◽  
Sweet Cherry ◽  
Prunus Avium ◽  
Fruit Set ◽  
Foliar Application ◽  
Negative Effects ◽  
Return Bloom

Sweet cherry (Prunus avium L.) is a valuable fruit crop worldwide. Farmers’ incomes are closely related to fruit quantity and quality, yet these can be highly variable across years. As part of a broader project for optimizing fruit set and fruit quality in sweet cherries, this study was conducted to evaluate the potential of various plant growth regulators (PGRs) for improving fruit set and fruit quality. Cytokinins, gibberellins, auxin, and polyamines were used as treatments. Treatments were applied as foliar sprays at full bloom to ‘Bing’ and three low-productivity genotypes, ‘Regina’, ‘Tieton’, and ‘PC8011-3’. We assessed the fruit set, fruit quality, and return bloom from each treatment. 4-chlorophenoxyacetic acid (4-CPA) increased fruit set by 53% and 36% in ‘Bing’ and ‘Tieton’, respectively. The combination of gibberellin (GA)3 + GA4/7 was more effective for improving fruit set than other isomers of gibberellin alone. Cytokinin treatments had slight adverse effects or no effect on fruit set except for CPPU. In ‘PC8011-3’, both N-(2-chloro-4-pyridyl)-N'-phenylurea (CPPU) and 4-CPA enhanced fruit set by ≈81% and 100% compared with untreated control. The response of cherry trees to polyamine sprays depended on the properties of the cultivars and the treatment concentration. Foliar application of GA3, GA4/7, or N-phenyl-N'-(1, 2, 3-thiadiazol-5-yl) urea (TDZ) in ‘Bing’ trees has negative effects on return bloom, whereas GA1 can increase the yield and flower buds. These results suggest that PGRs may have varied effects on sweet cherry fruit set and that more work is needed to develop practical programs for improving yield security.

scholarly journals Investigations of suitable pollinator for 0900 Ziraat sweet cherry cv.: pollen performance tests, germination tests, germination procedures, in vitro and in vivo pollinations

2008 ◽  
Vol 34 (No. 2) ◽  
pp. 47-53 ◽  
Author(s):  
F. Tosun ◽  
F. Koyuncu
Keyword(s):  
Pollen Tube ◽  
Pollen Germination ◽  
Sweet Cherry ◽  
Fruit Set ◽  
Pollen Viability ◽  
Performance Tests ◽  
Pollen Performance ◽  
Growth Experiments

The objective of this study was to determine suitable cultivars to be used as pollinators for 0900 Ziraat. 0900 Ziraat was used as a female cultivar; Bigarreu Gaucher, Bing, Noble, Starks Gold, Stella, Van, and Vista were used for pollination in the experiments. Starks Gold had the highest values in terms of anther number, average number of pollens per anther, number of pollen per flower and the morphological homogeneity. The pollen viability rates showed significant differences according to stain tests. <i>In vitro</i> pollen germination in 0.5% agar + 15% sucrose + 5 ppm boric acid medium increased with increasing incubation period, and the highest germination was obtained after 48 hours for all cultivars. In orchard trials parallel to pollen tube growth experiments in the laboratory, 0900 Ziraat &times; Starks Gold combination gave the best fruit set results.

scholarly journals Effects of Gibberellin Inhibitors on the Fruit Set Rate and Ovule Degeneration in Sweet Cherry (Prunus avium L.)

2019 ◽  
Vol 18 (2) ◽  
pp. 139-142
Author(s):  
Akira Tomita ◽  
Eiki Hagihara ◽  
Michiko Dobashi-Yamashita ◽  
Masashi Ida ◽  
Shuji Ohno
Keyword(s):  
Sweet Cherry ◽  
Prunus Avium ◽  
Fruit Set
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