Stability of Fire Blight Resistance in Apple

Richter, Klaus; Fischer, C.

doi:10.17660/actahortic.2002.590.58

Cited by 17 publications

(11 citation statements)

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“…The ability of apple genotypes to exclude penetration of the fire blight pathogen, or suppresses activity after penetration can be strongly affected by the age, vigour, and nutrition of the host; environmental factors, particularly temperature and humidity; location of the orchard; soil types; orchid moisture levels, cultural practices; and combinations of one or all of these factors (van der Zwet & Keil 1979). For example, in tests carried out by Richter and Fisher (2000), the length of blighted apple shoots markedly decreased because of lower temperature in the greenhouse following inoculation.…”

Section: Discussionmentioning

confidence: 99%

“…Among examples of such parameters include movement of the fire blight pathogen inside the host plant (Paulin & Lespinasse 1987;Crepel et al 1997;Richter & Fisher 2000;Bogs et al 2004); frequency and the severity of infection; the use of medium infective dose (ID 50 ); quantitative trait loci analysis (Khan et al 2006). An important question is whether the inoculation should be performed with a single strain or a mix of trains (Norelli et al 1987;Crepel et al 1997;Lespinasse & Aldwinckle 2000;Richter & Fisher 2000). Our results should be useful to apple breeders and growers, because genotypes that are resistant and susceptible to fire blight were identified.…”

Section: Discussionmentioning

confidence: 99%

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Resistance of apple varieties and selections to Erwinia amylovora in the Czech Republic

Korba¹,

Šillerová²,

Kůdela³

2008

Plant Prot. Sci.

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Sixty-four apple cultivars and selections of potential interest to apple producers and plant breeders in the Czech Republic were tested for their relative resistance to the fire blight pathogen over six years. Level of fire blight resistance was evaluated according to the extent of lesion development on the shoots tips after artificial inoculation in experimental plots under insectproof nets. Cultivars Quinte (resistant) and Yellow transparent (high susceptible) were included in the tests. Of 64 apple cultivars and selections tested, none were high resistant, 3.1% were evaluated as resistant, 10.9% moderately resistant, 57.8% moderately susceptible, 21.9% susceptible and 6.3% high susceptible. Resistant apple genotypes, showing blight necrosis of shoots of 11–12%, were only cultivars Selena and Quinte. Moderately resistant genotypes (blight necrosis 13.1–25.0%) were Kordona, Golden Smoothee, Julia, HL 323, Melodie, HL 421 and S 634/3. High susceptible genotypes (blight necrosis more then 80.1%) were comprised cultivars Vesna, Topas, Yellow transparent and Vanda. The remaining genotypes were moderately susceptible (blight necrosis 26.1–60.0%) and susceptible (blight necrosis 60.1–80.0%). During six experimental years, quantitative variability was recorded in the blight score. Differences between cultivars in susceptibility to fire blight were often statistically significant.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Resistance of apple varieties and selections to Erwinia amylovora in the Czech Republic

Korba¹,

Šillerová²,

Kůdela³

2008

Plant Prot. Sci.

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“…An important question is, whether inoculation should be performed with a single strain or a mix of strains (Norelli et al 1987;Crepel et al 1997;Lespinasse, Aldwinckle 2000;Richter, Fisher 2000). All the above described methods of artificial inoculation were verified in our conditions and the most suitable was the method of decapitation of upper leaves of shoot tips by scissors immersed in E. amylovora suspension at a concentration of approximately 10 6 CFU/ml.…”

Section: Resultsmentioning

confidence: 83%

Evaluation of susceptibility level of pear cultivars to fire blight (Erwinia amylovora) in the Czech Republic

Korba¹,

Šillerová²,

Paprštein³

et al. 2013

Hort. Sci. (Prague)

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Korba J., Šillerová J., Paprštein F., Sedlák J., Prokinová E., Hošková P., 2013. Evaluation of susceptibility level of pear cultivars to fire blight (Erwinia amylovora) in the Czech republic. Hort. Sci. (Prague), 40: 58-64.Thirty-three pear cultivars and selections of potential interest to pear producers and plant breeders in the Czech Republic were tested for relative field susceptibility to the fire blight (Erwinia amylovora) over five years. Level of fire blight susceptibility was evaluated according to the extent of lesion development on the shoot tips after artificial inoculation in experimental plots under insect proof nets. Old cvs Alexander Lucas (as resistant standard), Conference (as moderately resistant standard) and Beurré Bosc (as susceptible standard) were included in the tests. The 33 pear cultivars and selections were tested, only one of them was highly resistant (3.0%), 3.0% were evaluated as resistant, 12.1% moderately resistant, 36.4% moderately susceptible, 18.2% susceptible and 27.3% highly susceptible. Breeding selection US 625-63-10 was the only highly resistant pear genotype (necrosis of shoots of 0-7.0%). Resistant genotype group (necrosis 7.1-13.0%) comprised US 625-63-4. Moderately resistant genotypes (necrosis 13.1-25.0%) included cvs Alexander Lucas, Alfa, Bohemica and HL 31-50-31. Highly susceptible genotypes (necrosis more than 80.1%) included cvs Vonka, Karina, Bona, Decora, Elektra, Milka, Regina, Alice and TE 4763. The remaining genotypes were moderately susceptible (necrosis 26.1-60.0%) and susceptible (necrosis 60.1-80.0%).

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“…As for the apple cultivars of DresdenPillnitz origin that were included in Table 2, Reanda, Remo and Rewena showed a high level of stable resistance (RICHTER, FISCHER 2002).…”

Section: Resultsmentioning

confidence: 99%

Testing of Czech cultivars and advanced selections of apples for fire blight (Erwinia amylovora) resistance

Fischer¹,

Richter²,

Blažek³

2004

Hort. Sci. (Prague)

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Five apple cultivars from the Czech Republic and 26 selections from the same country (a majority of them were resistant to scab) were included in the present study. M. robusta strain (Nr. 5) was used as a control with the highest level of resistance to fire blight. Another 7 cultivars with different levels of resistance or susceptibility to the disease were also evaluated. Selena and Nabella were found to be resistant, whereas Angold, Resista and Topaz were susceptible. Two HL selections were previously identified as highly resistant, 3 selections as medium resistant and 7 others as moderately susceptible. The rest of the 14 selections ranged from very high susceptible to medium susceptible. A high level of resistance was confirmed in 3 cultivars from DresdenPillnitz: Reanda, Remo and Rewena. Comparison of the parentage of the tested cultivars or selections with their level of resistance to fire blight suggests that most of the resistance comes from Malus floribunda, which was used in the course of their breeding as a donor of scab resistance. In one case, the source of the fire blight resistance was Starking Delicious cv.

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Stability of Fire Blight Resistance in Apple

Cited by 17 publications

References 0 publications

Resistance of apple varieties and selections to Erwinia amylovora in the Czech Republic

Resistance of apple varieties and selections to Erwinia amylovora in the Czech Republic

Evaluation of susceptibility level of pear cultivars to fire blight (Erwinia amylovora) in the Czech Republic

Testing of Czech cultivars and advanced selections of apples for fire blight (Erwinia amylovora) resistance

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