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Genome-Wide Linkage and Association Mapping of Halo Blight Resistance in Common Bean to Race 6 of the Globally Important Bacterial Pathogen

by Holub, Eric B. , Vasconcellos, Renato C. C. , Fourie, Deidré , Vicente, Joana G. , Song, Qijian , Porch, Timothy G. , Tock, Andrew J. , Hart, John P. , Cichy, Karen A. , Miklas, Phillip N. , Pastor-Corrales, Marcial A. , Soler, Alvaro , Barker, Guy C. , Walley, Peter G.

in Beans / Blight / Chromosomes / Crop diseases / Crop yield / Crops / Cultivars / Disease resistance / Gene mapping / Genes / Genome-wide association studies / Genomes / Halo blight / Inbreeding / NLR / Pathogens / Phaseolus vulgaris / plant immunity / Plant resistance / Plant Science / Populations / Proteins / Pseudomonas syringae pv. phaseolicola / Quantitative trait loci / race-nonspecific and race-specific resistance / RNA-binding protein / Seeds

2017

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Genome-Wide Linkage and Association Mapping of Halo Blight Resistance in Common Bean to Race 6 of the Globally Important Bacterial Pathogen

2017

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Genome-Wide Linkage and Association Mapping of Halo Blight Resistance in Common Bean to Race 6 of the Globally Important Bacterial Pathogen

2017

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Journal Article

Genome-Wide Linkage and Association Mapping of Halo Blight Resistance in Common Bean to Race 6 of the Globally Important Bacterial Pathogen

Holub, Eric B.,

Vasconcellos, Renato C. C.,

Fourie, Deidré,

Vicente, Joana G.,

Song, Qijian,

Porch, Timothy G.,

Tock, Andrew J.,

Hart, John P.,

Cichy, Karen A.,

Miklas, Phillip N.,

Pastor-Corrales, Marcial A.,

Soler, Alvaro,

Barker, Guy C.,

Walley, Peter G.

2017

Overview

pv. ( ) Race 6 is a globally prevalent and broadly virulent bacterial pathogen with devastating impact causing halo blight of common bean ( L.). Common bean lines PI 150414 and CAL 143 are known sources of resistance against this pathogen. We constructed high-resolution linkage maps for three recombinant inbred populations to map resistance to Race 6 derived from the two common bean lines. This was complemented with a genome-wide association study (GWAS) of Race 6 resistance in an Andean Diversity Panel of common bean. Race 6 resistance from PI 150414 maps to a single major-effect quantitative trait locus (QTL; HB4.2) on chromosome Pv04 and confers broad-spectrum resistance to eight other races of the pathogen. Resistance segregating in a Rojo × CAL 143 population maps to five chromosome arms and includes HB4.2. GWAS detected one QTL (HB5.1) on chromosome Pv05 for resistance to Race 6 with significant influence on seed yield. The same HB5.1 QTL, found in both Canadian Wonder × PI 150414 and Rojo × CAL 143 populations, was effective against Race 6 but lacks broad resistance. This study provides evidence for marker-assisted breeding for more durable halo blight control in common bean by combining alleles of race-nonspecific resistance (HB4.2 from PI 150414) and race-specific resistance (HB5.1 from cv. Rojo).

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Publisher

Frontiers Media SA,Frontiers Media S.A

Subject

/ Blight

/ Crops