Maintenance

All wikis at Biowikifarm are in read-only mode due to the restoration after a severe cyberattack in October 2023.
After 1 year being shut down the Biowikifarm is online again.
You see the latest restored version from 18th October 2023.

Plant Breeding (1998) 117, 367-372

From Pestinfo-Wiki
Jump to: navigation, search

J. Degener, A.E. Melchinger, R.K. Gumber and V. Hahn (1998)
Breeding for Sclerotinia resistance in sunflower: A modified screening test and assessment of genetic variation in current germplasm
Plant Breeding 117 (4), 367-372
Abstract: Sclerotinia sclerotiorum (Lib.) de Bary is one of the most devastating pathogens of sunflower (Helianthus annuus), causing yield losses up to 100%. This study was conducted to (1) screen sunflower lines for their reaction to Sclerotinia using artificial infection by a modified leaf test, and (2) identify the most suitable trait for screening against Sclerotinia resistance. A set of 85 inbred lines was screened in three environments by infecting the leaves with mycelium and covering them with plastic bags containing water. Susceptibility was assessed by leaf lesion, petiole score, stem rating, stem lesion and diseased stems. The test proved to be effective and practicable, with an infection rate of up to 99%. All scoring traits were strongly correlated with each other and effective in differentiating among susceptible and resistant lines. Although petiole score had the highest heritability, its association with leaf length hampers its utilization as a scoring trait. Stem lesion was a good predictor of mid-stalk rot and can be recommended as a reliable trait for screening sunflower lines against Sclerotinia based on its high heritability estimate (h2 = 0.59) and close correlations with other traits measured after artificial and natural infection.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Volker Hahn, Albrecht E. Melchinger

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.


Sclerotinia sclerotiorum Sunflower (Helianthus annuus)