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Verification of Infection‐Type Data for Identification of Genes for Resistance to Leaf Rust in Some Hard Red Spring Wheat
Author(s) -
McVey D. V.
Publication year - 1989
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/cropsci1989.0011183x002900020014x
Subject(s) - biology , rust (programming language) , cultivar , genotype , botany , guard cell , horticulture , puccinia , gene , resistance (ecology) , agronomy , genetics , mildew , computer science , programming language
Infection‐type data have been used to postulate the genes present in wheat ( Triticum aestivum L.) cultivars conditioning resistance to wheat leaf rust ( Puccinia recondita Rob ex Desm. f. sp. tritici ). Conventional genetic studies confirmed the accuracy of the hypothetical resistance genotypes derived from infection‐type data. The objectives of this study were to: (i) postulate the genes for resistance to leaf rust in 10 hard red spring wheat and, (ii) confirm their postulated resistance genotypes by crossing them with appropriate leaf rust (LR) near‐isogenic line(s). Both phases of the study were based on leaf rust reactions of wheat seedlings in the greenhouse. Postulated resistance genotypes confirmed by the genetic study were: ‘Glenlea’ contained Lr l; ‘Era’ contained Lr lO; ‘Alex’, ‘James‘, and ‘Waldron‘ contained Lr 2a and Lr lO; ‘Guard’ and ‘Marshall’ contained Lr 2a; and MN7529 contained Lr lO and Lr l6. In addition, it was postulated that Guard, ‘Len’, and Marshall also contained Lr lO and that MN7529 contained Lr l based on the infection‐type data. The accuracy of postulated resistance genotypes indicates that infection‐type data can be used with confidence in selecting parents for making crosses to develop new genetic combinations for resistance.