Fitopatologia Brasileira (2003) 28, 184-188

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Davi T. Junghans, Acelino C. Alfenas and Luiz A. Maffia (2003)
Escala de notas para quantificação da ferrugem em Eucalyptus
[Rating scale to eucalypts rust severity evaluation]
Fitopatologia Brasileira 28 (2), 184-188
Abstract: Based on the pustule size, a rating scale was developed for evaluation of rust severity in inoculated seedlings of Eucalyptus sp. as follow: S0 = immunity or hypersensitive reaction, with necrosis or fleck; S1 = small pustules, < 0.8 mm diameter; S2 = medium sized pustules, from 0.8 to 1.6 mm diameter and S3 = large pustules, > 1.6 mm diameter. This scale was checked in a segregant progeny of E. grandis by using the RAPD AT9/917 marker, tightly linked to a rust resistance locus. Only plants classified as S0 and S1 had the RAPD marker and were considered resistant. The error in the classification of resistant and susceptible plants was low (8%). The use of this scale allowed a very fast and accurate screening of rust resistant genotypes.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
(original language: Portuguese)
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Database assignments for author(s): Acelino C. Alfenas, Luiz A. Maffia

Research topic(s) for pests/diseases/weeds:
resistance/tolerance/defence of host

Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.

Austropuccinia psidii Eucalypt (Eucalyptus)