Biological, Chemical, Cultural Control Methods and Determination Resistant Cultivars to Fire Blight in Pear Orchards in the Eastern Mediterrenean Region of Turkey

Aysan, Y.; ÇINAR, Orçun; Tokgönül, S.; Küden, Ali

doi:10.17660/actahortic.1999.489.95

Cited by 11 publications

(9 citation statements)

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“…4 Relationship between shoot length and lesion length of fire blight in quince genotypes from Lake Van Basin, Turkey In this study, many apple and pear accessions had similar GSI scores to those reported by Korba et al (2008) and Tsiantos and Psallidas (2004) in their identification of moderately resistant, moderately susceptible, susceptible and highly susceptible genotypes of apple and pear. It has been reported that 'Williams' and 'Deveci' pear varieties are highly susceptible, and 'Ankara' pear variety is moderately susceptible (Aysan et al 1999;van der Zwet and Beer 1991;Momol et al 1992). The pear varieties used for comparison in this study, 'Ankara' and 'Williams', were similarly moderately susceptible and highly susceptible to fire blight, respectively.…”

Section: Discussionmentioning

confidence: 99%

Levels of fire blight (Erwinia amylovora) susceptibility of native apple, pear and quince germplasm from Lake Van Basin, Turkey

2011

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Fire blight resistance of apple, pear and quince genetic resources from Lake Van Basin (eastern Turkey) was tested using Erwinia amylovora strain Ea Van. Shoot tips of 92 native accessions (48 accessions for apple, 38 accessions for pear and 6 accessions for quince) were wounded for inoculation, and artificially inoculated with pathogenic bacteria under greenhouse conditions. The levels of resistance of accessions were classified in comparison with control varieties according to the genotype susceptibility index (GSI%) scores based on the lesion length on shoots of each genotype. Fire blight resistance of accessions consisted of five classes: resistant (R), moderately resistant (MR), moderately susceptible (MS), susceptible (S) and highly susceptible (HS). GSI% scores differed significantly among accessions from each fruit species (p<0.01). GSI values ranged from 12.4% to 64.1% for apple genotypes, from 17.2% to 55.1% for pear genotypes, and from 17.8% to 43.4% for quince genotypes. No resistant genotypes of apple, pear and quince were observed. Seven accessions of apple, two accessions of pear and one accession of quince were MR. 25 accessions of apple, 14 accessions of pear and one accession of quince were MS. These findings indicate a considerable variation in fire blight resistance and could contribute to breeding efforts regarding fire blight resistance in apple, pear and quince.

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Section: Discussionmentioning

confidence: 99%

Levels of fire blight (Erwinia amylovora) susceptibility of native apple, pear and quince germplasm from Lake Van Basin, Turkey

2011

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“…In previous studies, it was stated that 'Kiefer' variety was resistant to blossom blight while moderately resistant to shoot blight; 'Conference' was moderately resistant to shoot blight but very susceptible to blossom blight; 'Santa Maria' and 'Williams' were susceptible to shoot blight and moderately susceptible to blossom blight (SOBICZEWSKI et al, 1997). As a result of similar researches, pears 'Williams' and 'Santa Maria' were determined to be susceptible to the disease, whereas 'Ankara', 'Mustafa Bey', 'Conference', and 'Kaiser Alexandre' were moderately susceptible, and 'Limon', 'Kiefer', and 'Magness' had low susceptibility (VAN DER ZWET and BEER, 1992; AYSAN et al, 1999;HEVESI et al, 2004;SESTRAS et al, 2008;OZRENK et al, 2012). As it can be understood from former studies in which the susceptibility of parental varieties to fire blight was investigated, s 'Ankara', 'Conference', 'Kaiser Alexandre', 'Kiefer' and 'Magness' were found to be relatively more resistant to the disease while 'Akca', 'Santa Maria' and 'Williams' were found to be susceptible.…”

Section: Discussionmentioning

confidence: 98%

Susceptibility, heterosis and heterobeltiosis evaluations for fire blight resistance in pear

Mertoğlu¹,

Evrenosoğlu²,

Nuri³

2020

Genetika

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Fire blight is a devastating disease of Pomaceous trees that can cause death of the plants and leading to substantial crop losses. Controlled hybridization is widely used in breeding programs, due to the polygenic nature of fire blight resistance and the complexity of its mechanism. Right choice of parents appears to be the most significant criterion for obtaining genotypes that have desired characteristics. In this study 13 parental pear cultivars and 9749 F1 pear hybrids that were obtained from 36 different hybridization combinations were evaluated for fire blight resistance. Manifestation of heterosis and heterobeltiosis were also determined. As results of the study, 'Magness' is foremost as the most resistant variety, and followed by 'Ankara', 'Moonglow', 'Kiefer' and 'Kaiser Alexandre', respectively. 'Conference', 'Williams' and 'Santa Maria' were found susceptible to disease, while 'Guz', 'Limon', 'Bursa', 'Akca' and 'Tas' were highly susceptible to disease. Maternal parent was more effective for the transmission of fire blight resistance, when compared to pollinator parent. For this reason, it is suggested that disease-resistant varieties should be used as maternal parent. Heterosis was detected in 12 hybridization combinations. However, heterobeltiosis-focused approach was more effective for resistance breeding. For fire blight resistance, 'Magness  Kaiser Alexandre' and 'Magness  Kiefer' hybridization combinations that heterobeltiosis was determined are recommended.

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“…They were also effective in protecting blossoms and shoots. In search of useful isolates for disease control on pear, Aysan et al (1999) also used an agar nutrient test, demonstrating that selected isolates were satisfactorily effective in protecting this species blossoms (52-60%).…”

Section: Discussionmentioning

confidence: 99%

Bacterial species recognized for the first time for its biocontrol activity against fire blight (Erwinia amylovora)

et al. 2019

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This study included eight bacterial isolates originating from the apple phyllosphere or soil environment that were previously selected using the pear fruitlet test (Mikiciński 2017). Identification of these isolates based on phenotypic assays and DNA analysis showed that five of them belonged to species for which an antagonistic activity against Erwinia amylovora and the protective capacity of apple and pear against fire blight were not previously demonstrated. These were L16 identified as Pseudomonas vancouverensis, 3 M as Pseudomonas chlororaphis subsp. aureofaciens, 35 M-Pseudomonas congelans, 43 M-Enterobacter ludwigii, and 59 M-Pseudomonas protegens. Investigation of the biotic relationships between the tested strains and E. amylovora showed that 3 M, 35 M and 59 M inhibited the growth of the pathogen on five out of six media used (NAS, KB, LB, R2A, NAG), but 43 M did not do so on any of these media. Strain L16 did not inhibit the growth of the pathogen on LB or R2A medium. In contrast, all strains grown on medium 925 stimulated the growth of the pathogen, which showed no growth without cocultivation with these strains. The experiments on apple trees and detached apple branches showed the ability of the tested bacteria to protect flowers at medium to high levels, depending on the experiment (55-93%). In some cases, this protection was even higher than that of the copper product used for comparison. In studies assessing the bacterial ability to protect shoots of M.26, the highest efficacy was observed for strains 35 M (96%) and 43 M (93%) but on 'Gala Must' all tested strains showed 100% of efficacy.

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Biological, Chemical, Cultural Control Methods and Determination Resistant Cultivars to Fire Blight in Pear Orchards in the Eastern Mediterrenean Region of Turkey

Cited by 11 publications

References 0 publications

Levels of fire blight (Erwinia amylovora) susceptibility of native apple, pear and quince germplasm from Lake Van Basin, Turkey

Levels of fire blight (Erwinia amylovora) susceptibility of native apple, pear and quince germplasm from Lake Van Basin, Turkey

Susceptibility, heterosis and heterobeltiosis evaluations for fire blight resistance in pear

Bacterial species recognized for the first time for its biocontrol activity against fire blight (Erwinia amylovora)

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