Complementary resistance genes in wheat selection ‘Avocet R’ confer resistance to stripe rust

作者: Peter M. Dracatos , Peng Zhang , Robert F. Park , Robert A. McIntosh , Colin R. Wellings

DOI: 10.1007/S00122-015-2609-7

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摘要: Complementary genes for resistance to wheat stripe rust in an Avocet selection mapped chromosome arms 3DL and 5BL. Susceptible selections lacked the 5BL gene due a chromosomal deletion. This study reports inheritance genetic mapping of YrA (temporary name convenience describe specificity) seedling (caused by Puccinia striiformis f. sp. tritici; Pst) resistant Australian cv. [Avocet R (AvR)-AUS 90660]. Genetic analysis was performed on F2 populations F3 generation families from crosses between wheats that carried resistance. Greenhouse tests with two avirulent Pst pathotypes (104 E137 A- 108 E141 A-) confirmed inherited as complementary dominant genes. Ninety-two doubled haploid (DH) lines cross Teal (Pst susceptible) AvR were used DArT-Seq genotypic map Marker-trait association using 9035 loci long chromosomes 3D (3DL) 5B (5BL), respectively. susceptible DH either or marker genotypes model. Fluorescence situ hybridization (FISH) determined carries reciprocal T5B-7B translocation. FISH also identified deletion S relative further validated model possibly explained heterogeneity closely related carrying The individual designated Yr73 Yr74 (5BL). Candidate single reference stocks will be permanently accessioned following cytological avoid

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