scholarly journals Differences in virulence of Diplocarpon earlianum isolates on selected strawberry cultivars

2005 ◽  
Vol 77 (3) ◽  
pp. 113-118 ◽  
Author(s):  
A.G. Xue ◽  
J.C. Sutton ◽  
A. Dale ◽  
J.A. Sullivan
Keyword(s):  
Leaf Area ◽  
Fragaria X Ananassa ◽  
Leaf Disk ◽  
Leaf Scorch ◽  
High Virulence ◽  
Virulence Group ◽  
Strawberry Cultivars

Eight isolates of Diplocarpon earlianum were evaluated for virulence, measured as the ability to produce percent leaf area with symptoms (LAS), on 18 cultivars of strawberry (Fragaria x ananassa). Significant differences were observed from isolate and cultivar effects, and isolate x cultivar interaction. Four of the eight isolates, on the average of 18 strawberry cultivars, had LAS ranging from 6.7-9.6%, and were classified as a group of low virulence. The remaining four isolates had LAS ranging from 25.9-45.8% and formed a high virulence group. Of the cultivars tested, 'Vibrant' was resistant and 'Micmac' was susceptible to all isolates in both virulence groups; 'Honeoye', 'Redcoat', 'Scotland', 'St. Clair' and 'Vantage' were resistant to the low virulence group, but had differential interactions to isolates in the high virulence group; the remaining 11 cultivars were susceptible to the high virulence group, but had differential interactions to isolates in the low virulence group. It is suggested that a number of different pathogen isolates are required to test strawberry genotypes for leaf scorch resistance. A leaf disk assay was developed in this study and can be used for laboratory evaluations of strawberry genotypes for susceptibility to D. earlianum.

scholarly journals CHROMOSOME NUMBER AND TIME PERIOD OF MITOTIC CYCLE OF FESTIVAL AND CALIFORNICA STRAWBERRY CULTIVARS (Fragaria x ananassa AND Fragaria vesca)

2015 ◽  
Vol 2 (1) ◽  
pp. 476
Author(s):  
Ganies Riza Aristya ◽  
Rezika Alyza ◽  
Rosyidatul Khoiroh ◽  
Budi Setiadi Daryono
Keyword(s):  
Chromosome Number ◽  
Reverse Genetics ◽  
Fragaria X Ananassa ◽  
Fragaria Vesca ◽  
Time Period ◽  
Genomics Research ◽  
Strawberry Cultivar ◽  
Pre Treatment ◽  
Seed Propagation ◽  
Strawberry Cultivars

<p>The cultivated strawberries, Fragaria x ananassa and Fragaria vesca, are the most economically-important softfruit species. F x ananassa and F vesca, both diploid (2n=2x=14) relatives of the commercial octoploid strawberry, are an attractive model for functional genomics research in Rosaceae. Its small genome size, short reproductive cycle, and facile vegetative and seed propagation make F. x annassa and F.vesca a promising candidates for forward and reverse genetics experiments. In order to determine their genetic differences in more detail, chromosome characterization of the two strawberry cultivars was investigated. A method used for chromosome slides in this research was a squash method with modification in pre-treatment. The result showed Fragaria x ananassa had (2n = 4x = 28) chromosome number is 28 and Fragaria vesca had (2n = 2x = 14) chromosome number is 14. The time of mitotic that both strawberry cultivars was similar at 7 to 8.30 am. In addition, mixoploid cells were found in both strawberry cultivar indicating that these cultivars had been treated by mutagenic agents for a breeding program.</p><p><br /><strong>Keywords</strong> : Fragaria, chromosome, mitotic</p>

Consistency of organoleptic and yield related traits of strawberry cultivars over time

2020 ◽  
Vol 10 (4) ◽  
pp. 623-636
Author(s):  
M.T. Ariza ◽  
L. Miranda ◽  
E. Martínez-Ferri ◽  
J.J. Medina ◽  
J.A. Gómez-Mora ◽  
...  
Keyword(s):  
Fragaria X Ananassa ◽  
Crop Season ◽  
Breeding Programs ◽  
Continuous Increase ◽  
Environment Temperature ◽  
New Varieties ◽  
Different Characteristics ◽  
Organoleptic Parameters ◽  
Over Time ◽  
Strawberry Cultivars

BACKGROUND: Strawberry (Fragaria x ananassa Duch.) is among the most widely consumed fruits in the world and its cultivation is increasing worldwide. This continuous increase in its cultivation acreage is concomitant with the development of new varieties by numerous breeding programs. Due to strawberry is a microclimatic crop, the behaviour of the cultivars could vary depending on many agronomical and environmental factors such as temperature or humidity. Thus, for some traits, data from a single crop season may not be enough to suspect the behaviour of a specific variety. OBJECTIVE: Generate information that allows knowing the consistency of different characteristics over time. METHODS: For four consecutive years, organoleptic and yield related traits were analysed in five strawberry cultivars. RESULTS: The overall result is a significant effect of genotype on all yield relates and organoleptic parameters studied. Our study also inferred an effect of environment, temperature and relative humidity, mainly on yield parameters. However, not all cultivars were similarly affected. CONCLUSIONS: With the information generated from this work, it will be possible to establish, based on the consistency of the cultivar trials over time, the suitability of using the results of a single season to predict the behaviour of a particular cultivar.

scholarly journals Strawberry (Fragaria X ananassa Duch.) yiel das affected by the soil pH

2009 ◽  
Vol 81 (2) ◽  
pp. 265-269 ◽  
Author(s):  
Tomo M. Milosevic ◽  
Nebojsa T. Milosevic ◽  
Ivan P. Glisic
Keyword(s):  
Calcium Oxide ◽  
Soil Ph ◽  
Environmental Conditions ◽  
Acid Soils ◽  
Application Rate ◽  
Fragaria X Ananassa ◽  
Yield Drop ◽  
Strawberry Cultivars

Two-year trials (20062007) suggested that the use of calcium oxide (CaO) on acid soils increased soil pH and yields in strawberry cultivars Marmolada, Selena and Senga Sengana, under the environmental conditions of Cacak (Western Serbia). The highest yield was obtained when CaO was applied at 750 kg ha-1 rate. Further increase in rate up to 1,500 kg ha-1 did not show corresponding increase in yield; the result was a slight yield drop compared to the peak yield shown at 750 kg ha¹ rate. Overall, yields at rates above 750 kg ha¹ were still higher than control and in the treatment employing lowest CaO application rate of 250 kg ha-1.

scholarly journals Chemical composition and antioxidant capacity in strawberry cultivars (Fragaria x ananassa Duch.) by FT-MIR spectroscopy and chemometrics

2019 ◽  
Vol 17 (1) ◽  
pp. 724-732 ◽  
Author(s):  
Patricia Minutti-López Sierra ◽  
Tzayhri Gallardo-Velázquez ◽  
Guillermo Osorio-Revilla ◽  
Ofelia Gabriela Meza-Márquez
Keyword(s):  
Chemical Composition ◽  
Antioxidant Capacity ◽  
Fragaria X Ananassa ◽  
Mir Spectroscopy ◽  
Strawberry Cultivars

scholarly journals Fruit Quality and Resistance of Strawberry Cultivars and Hybrids and the Effect of Calcite Fertiliser

2017 ◽  
Vol 71 (3) ◽  
pp. 198-202
Author(s):  
Valda Laugale ◽  
Sandra Dane ◽  
Līga Lepse ◽  
Sarmīte Strautiņa
Keyword(s):  
Fruit Quality ◽  
Drip Irrigation ◽  
Fragaria X Ananassa ◽  
Strawberry Fruit ◽  
Plastic Mulch ◽  
Horticultural Crop ◽  
Pests And Diseases ◽  
Black Plastic ◽  
Strawberry Cultivars ◽  
Resistance To Diseases

AbstractStrawberry (Fragaria x ananassa Duchense ex Rozier) is an important horticultural crop grown in Latvia. The aim of this research was to evaluate some newly introduced strawberry cultivars and perspective hybrids and to evaluate the efficiency of natural calcite leaf fertiliser (Megagreen®) on strawberry fruit quality and spread of pests and diseases. The trial was established in 2012 at Pûre, Tukums Municipality. Cultivars ‘Saint Pierre’, ‘Annapolis’, ’Sonata’, ‘Chambly’, ‘Elegance’, ‘Rumba’, ‘Honeoye’, ‘Senga Sengana’ and two hybrids: 35-1 and 39-1 were included in the investigation. Calcite fertiliser was applied four times per season in 2013 and 2014 by spraying on leaves in concentration 0.5%. Strawberries were grown on two row beds with black plastic mulch and drip irrigation. The evaluation was done for two seasons. Most of the evaluated newly introduced cultivars and hybrids had better fruit quality and resistance to diseases than control cultivars. Cultivars ‘Annapolis’, ’Rumba’, ‘Sonata’, ‘Elegance’, and 39-1 were selected as the most promising related to fruit quality and resistance. The application of calcite fertiliser (Megagreen®) on leaves had no statistically significant effect on strawberry fruit quality and resistance.

Elm leaf scorch: abnormal physiology in American elms infected with fastidious, xylem-inhabiting bacteria

1986 ◽  
Vol 16 (5) ◽  
pp. 1088-1091 ◽  
Author(s):  
Stanley J. Kostka ◽  
Terry A. Tattar ◽  
James L. Sherald
Keyword(s):  
Water Potential ◽  
Leaf Area ◽  
Stem Elongation ◽  
Stem Water Potential ◽  
Growth Reduction ◽  
Leaf Scorch ◽  
Infiltration Rates ◽  
Stem Water ◽  
Reduced Water ◽  
Xylem Function

Stem elongation, leaf area, xylem function, water relations, and stem starch reserves were compared between leaf scorch affected American elms (Ulmusamericana L.) infected with fastidious, xylem-inhabiting bacteria and symptomless trees. Stem elongation was significantly lower in elm leaf scorch affected trees than in symptomless trees, while no differences occurred in leaf area. Stem hydraulic conductivity in affected trees decreased from June through September, but increased during the same period in symptomless trees. Dye infiltration rates and number of functional vessels in stems collected from leaf scorch affected trees in September were significantly lower than in symptomless trees. Changes in stem water potential paralleled xylem infiltration rates. No differences in any measured parameters occurred between elm leaf scorch affected and symptomless trees in June prior to symptom onset. Once symptoms developed, stem water potential was more negative in affected trees than in symptomless trees. Mean stem starch levels were significantly higher in symptomless trees than in symptomatic trees. Results confirm that water deficit in leaf scorch affected trees may be attributed to xylem dysfunction possibly caused by bacterial occlusion. Growth reduction can be associated with decreased starch reserves induced by reduced water translocation and reduced effective photosynthetic area caused by the foliar necrosis of elm leaf scorch.

scholarly journals Genetic variations of strawberry cultivars of Fragaria x ananassa and Fragaria vesca based on RAPD

2019 ◽  
Vol 20 (3) ◽  
pp. 770-775
Author(s):  
GANIES RIZA ARISTYA ◽  
RINA SRI KASIAMDARI ◽  
RACHMI SETYONINGRUM ◽  
BENING LARASATI
Keyword(s):  
Genetic Variation ◽  
Molecular Markers ◽  
Random Amplified Polymorphic Dna ◽  
Similarity Index ◽  
Dna Amplification ◽  
Genetic Variations ◽  
Fragaria X Ananassa ◽  
Fragaria Vesca ◽  
Market Demand ◽  
Strawberry Cultivars

Abstract. Aristya GR, Kasiamdari RS, Setyoningrum R, Larasati B. 2019. Genetic variations of strawberry cultivars of Fragaria x ananassa and Fragaria vesca based on RAPD. Biodiversitas 20: 770-775. In Indonesia, the increasing market demand for strawberries (Fragaria spp.) is not comparable to increased strawberry productivity. One of the efforts made to increase strawberry productivity with superior quality is plant breeding. The purpose of this research was to determine the genetic variation, lineage, and similarity index in some strawberry cultivars using molecular markers of Random Amplified Polymorphic DNA (RAPD). Eleven strawberry cultivar samples were taken from Indonesian Citrus and Subtropical Fruits Research Institute (Balitjestro), Batu City, East Java, Indonesia and Strawberry Agritourism in Banyuroto Village, Magelang District, Central Java, Indonesia. DNA isolation using modified CTAB buffer method. DNA amplification using PCR-RAPD method with 5 primers, namely UBC-516, UBC-594, OPA 10, OPA 16, and OPG 11. Strawberry lineage dendrogram construction was analyzed with clustering of Unweight Pair-Group Using Arithmetic Average (UPGMA) software Multi-Variate Statistical Average (MVSP). The research results showed that the 5 RAPD primers used in 11 strawberry cultivars produced 30 polymorphic DNA bands and 20 monomorphic DNA bands so it can be concluded that the genetic variation among 11 strawberry cultivars can be detected using RAPD molecular markers. The lineage of 11 strawberry cultivars that have the highest similarity index is found in Earlibrite and Rosalinda II cultivars of 98.85%.

scholarly journals Identification of powdery mildew resistance QTL in Fragaria x ananassa

2018 ◽  
Author(s):  
Helen M. Cockerton ◽  
Robert J. Vickerstaff ◽  
Amanda Karlström ◽  
Fiona Wilson ◽  
Maria Sobczyk ◽  
...  
Keyword(s):  
Powdery Mildew ◽  
Powdery Mildew Resistance ◽  
Quantitative Resistance ◽  
Field Trials ◽  
Fragaria X Ananassa ◽  
Marker Assisted Breeding ◽  
Mildew Resistance ◽  
Moderate Effect ◽  
Mapping Populations ◽  
Strawberry Cultivars

AbstractThe obligate biotrophic fungus Podosphaera aphanis is the causative agent of powdery mildew on cultivated strawberry (Fragaria x ananassa). Genotypes from two bi-parental mapping populations ‘Emily’ x ‘Fenella’ and ‘Redgauntlet’ x ‘Hapil’ were phenotyped for powdery mildew disease severity in a series of field trials. Here we report multiple QTL associated with resistance to powdery mildew, identified in ten phenotyping events conducted across different years and locations. Seven QTL show a level of stable resistance across multiple phenotyping events however many other QTL were represented in a single phenotyping event and therefore must be considered transient. One of the identified QTL was closely linked to an associated resistance gene across the wider germplasm. Furthermore, a preliminary association analysis identified a novel conserved locus for further investigation. Our data suggests that resistance is highly complex and that multiple additive sources of quantitative resistance to powdery mildew exist across strawberry germplasm. Implementation of the reported markers in marker-assisted breeding or genomic selection would lead to improved powdery mildew resistant strawberry cultivars, particularly where the studied parents, progeny and close pedigree material are included in breeding germplasm.Key MessagePowdery mildew resistance in two strawberry mapping populations is controlled by both stable and transient novel QTL of moderate effect. Some transferability of QTL across wider germplasm was observed.

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