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Postulation of leaf‐rust resistance genes in Czech and Slovak barley cultivars and breeding lines
Author(s) -
Dreiseitl A.,
Steffenson B. J.
Publication year - 2000
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 - 10.1046/j.1439-0523.2000.00495.x
Subject(s) - cultivar , biology , germplasm , rust (programming language) , gene , hordeum vulgare , gene pool , czech , plant breeding , poaceae , botany , agronomy , horticulture , genetics , genetic diversity , population , linguistics , philosophy , demography , sociology , computer science , programming language
Leaf‐rust resistance ( Rph ) genes in 61 Czech and Slovak barley cultivars and 32 breeding lines from registration trials of the Czech Republic were postulated based on their reaction to 12 isolates of Puccinia hordei with different combinations of virulence genes. Five known Rph genes ( Rph2, Rph3, Rph4, Rph7 , and Rph12 ) and one unknown Rph gene were postulated to be present in this germplasm. To corroborate this result, the pedigree of the barley accessions was analysed. Gene Rph2 , as well as Rph4 , originated from old European cultivars. The donor of Rph3 , which has been mainly used by Czech and Slovak breeders, is ‘Ribari’ (‘Baladi 16’). Rph12 originates from barley cultivars developed in the former East Germany. Rph7 in the registered cultivar ‘Heris’ originates from ‘Forrajera’. A combination of two genes was found in 10 cultivars. Nine heterogeneous cultivars were identified; they were composed of one component with an identified Rph gene and a second component without any resistance gene. No gene for leaf rust resistance was found in 17 of the accessions tested. This study demonstrates the utility of using selected pathotypes of P. hordei for postulating Rph genes in barley.