Powdery mildew resistance in barley landrace material. I. Screening for resistance |
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Authors: | J Helms Jørgensen HP Jensen |
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Institution: | 1. Ris? National Laboratory, Plant Genetics Environmental Science and Technology Department, DK-4000, Roskilde, Denmark
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Abstract: | A total of 4,681 accessions of Hordeum vulgare landrace material from Ethiopia, East Mediterranean, Near East, Nepal and China
were sown in the field and subjected to the natural powdery mildew epidemic in Denmark. Apparently resistant accessions were
selected. Selfed progeny from them were retested and reselected in subsequent years at four locations in Denmark. Finally,
16 promising donors of resistance were retained. They were characterized in the field and tested in the seedling stage for
reaction to up to 72 different isolates of the powdery mildew fungus. The absence of the corresponding virulences in the Danish
airborne powdery mildew population was ascertained in five years. The resistances in the 16 donors are apparently mutually
different and from known sources of powdery mildew resistance in barley.
This revised version was published online in July 2006 with corrections to the Cover Date. |
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Keywords: | Erysiphe graminis f sp hordei genetic resources Hordeum vulgare recurrent selection resistance virulence |
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