The Differences among Pear Genotypes to Fire Blight (Erwinia amylovora) Attack, Based on Observations of Natural Infection

Authors

  • Adriana F. SESTRAS Fruit Research Station, 3-5 Horticultorilor St., Cluj-Napoca 400454 (RO)
  • Radu E. SESTRAS University of Agricultural Sciences and Veterinary Medicine, Cluj-Napoca, 3-5 Mănăștur St., 400372 (RO)
  • Adrian BARBOS Fruit Research Station, 3-5 Horticultorilor St., Cluj-Napoca 400454 (RO)
  • Madalina MILITARU Fruit Research Institute, Pitesti, Maracineni, 117450, Jud. Arges (RO)

DOI:

https://doi.org/10.15835/nbha36277

Keywords:

Erwinia, attack degree, pear, species breeding, genotypes

Abstract

Fire blight, caused by the bacterium Erwinia amylovora, is one of the most damaging diseases of pear in the world. In Cluj-Napoca area, situated in central Transylvania, Romania, fire blight was observed first in 1994, very late comparative with the other countries from occidental Europe. The response of the pear cultivars and species from National Pear Collection from Cluj-Napoca to fire blight attack, assessed in natural conditions of infection, range on a large scale of variability, which denotes a strong influence of the genotype in expression of resistance or sensitivity to disease. From all genotypes, about 20.5% have not presented symptoms of attack, among them being the following: 'Blanquet precoce', 'Klementinka', 'Severianka', 'Beurre Bachelier', 'Kieffer Seedling', 'Er Shi Shinge', 'Beurre Amanlis', 'Bristol Cross', 'Beurre Liegel', 'Beurre Lucon', 'Grand Champion', 'Magness', 'Mericourt' etc. and several ancient autochthonous cultivars ('Pere malaiete', 'De zahar de Bihor', 'Cu miez rosu', 'Clopotele', 'Garoafa mare', 'Craiese', 'Para de apa'). Also, there were identified several species of Pyrus with no attack, as P. pollveria, P. common pear, P. lindlezi, P. malifolia, P. persica, P. ussuriensis, P. variolosa. The remarked genotypes could be potential sources for further breeding programmes and increase the number of genotypes available for breeding new pear cultivars resistant to Erwinia attack.

References

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Published

2008-12-30

How to Cite

SESTRAS, A. F., SESTRAS, R. E., BARBOS, A., & MILITARU, M. (2008). The Differences among Pear Genotypes to Fire Blight (Erwinia amylovora) Attack, Based on Observations of Natural Infection. Notulae Botanicae Horti Agrobotanici Cluj-Napoca, 36(2), 97–103. https://doi.org/10.15835/nbha36277

Issue

Vol. 36 No. 2 (2008)

Section

Research Articles
CITATION
DOI: 10.15835/nbha36277

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Copyright (c) 2008 Adriana F. SESTRAS, Radu E. SESTRAS, Adrian BARBOS, Madalina MILITARU

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This work is licensed under a Creative Commons Attribution 4.0 International License.

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© Articles by the authors; licensee UASVM and SHST, Cluj-Napoca, Romania. Papers published in the journal Notulae Botanicae Horti Agrobotanici Cluj-Napoca are open access distributed under the terms and conditions of the Creative Commons Attribution License (http://creativecommons.org/licenses).

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