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Monosomic Analyses of Genes for Stem Rust Resistance Derived from Marquis and Reliance Wheats 1
Author(s) -
Anderson M. K.,
Williams N. D.,
Maan S. S.
Publication year - 1971
Publication title -
crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.76
H-Index - 147
eISSN - 1435-0653
pISSN - 0011-183X
DOI - 10.2135/cropsci1971.0011183x001100040029x
Subject(s) - biology , backcrossing , gene , stem rust , chromosome , rust (programming language) , botany , genetics , puccinia , computer science , mildew , programming language
We determined the chromosomal locations of genes for resistance to culture 111‐SS2 of Puccinia graminis Pers. f. sp. tritici Eriks. & E. Henn. in Triticum aestivum L. em. Thell ssp. vulgare (Vill., Host) Mac Kay ‘Marquis’ and ‘Reliance’. Six wheat lines, Mq‐A, Mq‐B, Mq‐C, R1‐A, R1‐B, and R1‐C, which have monogenic resistance derived from Marquis/ T. aestivum L. em. Thell ssp. compactum (Host) Mac Key ‘Little Club’ and Reliance/Little Club, were crossed with each of the 21 ‘Chinese Spring’ monosomics. F 2 and backcross‐F 1 seedlings from each of the crosses were tested for reaction to culture 111‐SS2. Significant deviations from disomic toward monosomic ratios in the F 2 and backcross‐F 1 were used to identify the chromosomes that had the genes for rust resistance. Mq‐A and R1‐A have a gene ( Sr18 ) on chromosome 1D, Mq‐B has a gene ( Sr19 ) on 2B, Mq‐C and R1‐C have a gene ( Sr20 ) on 2B, and R1‐B has a gene ( Sr16 ) on 2B for resistance to culture 111‐SS2.