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Title: Genome-wide linkage and association mapping of halo blight resistance in common bean to race 6 of the globally important bacterial pathogen

Author
item TOCK, A - University Of Warwick
item FOURIE, D - Grain Crops Institute Of South Africa
item WALLEY, PETER - University Of Liverpool
item HOLUB, ERIC - University Of Warwick
item SOLER, ALVARO - Washington State University
item Cichy, Karen
item Pastor Corrales, Marcial
item Song, Qijian
item Porch, Timothy - Tim
item Hart, John
item VACONCELLOS, R - Federal University - Brazil
item VICENTE, JOANA - University Of Warwick
item BARKER, GUY - University Of Warwick
item Miklas, Phillip - Phil

Submitted to: Frontiers in Plant Science
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 6/19/2017
Publication Date: 7/7/2017
Citation: Tock, A., Fourie, D., Walley, P.G., Holub, E.B., Soler, A., Cichy, K.A., Pastor Corrales, M.A., Song, Q., Porch, T.G., Hart, J.P., Vaconcellos, R., Vicente, J.G., Barker, G.C., Miklas, P.N. 2017. Genome-wide linkage and association mapping of halo blight resistance in common bean to race 6 of the globally important bacterial pathogen. Frontiers in Plant Science. 8:1170. https://doi.org/10.3389/fpls.2017.01170.
DOI: https://doi.org/10.3389/fpls.2017.01170

Interpretive Summary: This study has exploited diverse common bean germplasm to enable high-resolution association and linkage mapping of novel and previously identified sources of resistance effective against a devastating crop pathogen, Psp Race 6. The detection of QTL on chromosomes Pv04 and Pv05 provide opportunities for marker-assisted breeding for resistance to Race 6, and will facilitate ‘pyramiding’ of factors with quantitative and qualitative effects to bolster resistance against evolving Psp pathogen populations

Technical Abstract: Halo bacterial blight is a serious seed borne disease that limits common bean yields worldwide. The Race 6 is the most prevalent strain of the pathogen. No resistance has been mapped which conditions resistance to Race 6 in common bean. In this study we investigate the response to Race 6 segregating in four RIL populations and a diversity panel. The four RIL poulations revealed two QTL on Pv04 and Pv05 which condition resistance to Race 6. The GWAS study of 400 Andean accessions (ADP) revealed the same Pv05 QTL. Both QTL have strong effects and can be exploited to breed for resistance to the widesperad Race 6 of the halo blight pathogen.