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Changes in Frequency of Plants Resistant to Barley Leaf Rust Caused by Puccinia hordei Otth. in a Barley Composite Cross Population
Author(s) -
Reinhold M.,
Bjarko M. E.,
Sands D. C.,
Bockelman H. E.
Publication year - 1993
Publication title -
plant breeding
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.583
H-Index - 71
eISSN - 1439-0523
pISSN - 0179-9541
DOI - 10.1111/j.1439-0523.1993.tb00566.x
Subject(s) - biology , seedling , rust (programming language) , inoculation , hordeum vulgare , selection (genetic algorithm) , poaceae , puccinia , agronomy , plant disease resistance , population , horticulture , resistance (ecology) , botany , biochemistry , demography , artificial intelligence , sociology , computer science , gene , mildew , programming language
The response of barley Composite Cross XLI to selection for resistance to leaf rust was evaluated. Representative samples from eight cycles of recurrent selection were inoculated with an isolate of Puccinia bordei Otth. in both the seedling and adult plant stage. Disease symptoms were evaluated 14 days after inoculation. The resistance in CC XLI increased with selection in the seedling stage from 15.1 to 20.5 %, and in the adult plant stage from 20.5 to 37.5 %, respectively. The largest gains in resistance were observed in the earlier cycles of recurrent selection. Significant fluctuations in percent resistant plants occurred between the years.