TY - JOUR
T1 - Genomic regions associated with resistance to soybean rust (Phakopsora pachyrhizi) under field conditions in soybean germplasm accessions from Japan, Indonesia and Vietnam
AU - Walker, David R.
AU - McDonald, Samuel C.
AU - Harris, Donna K.
AU - Roger Boerma, H.
AU - Buck, James W.
AU - Sikora, Edward J.
AU - Weaver, David B.
AU - Wright, David L.
AU - Marois, James J.
AU - Li, Zenglu
N1 - Funding Information:
The authors particularly thank Dr. Randall Nelson (USDA-ARS, retired) for suggesting that some germplasm accessions should be re-tested for SBR resistance in the field, for recommending certain accessions, and for providing seed from the USDA Soybean Germplasm Collection in Urbana, Illinois. We also thank Drs. Raymond W. Schneider (now deceased) and Clark Robertson of the Louisiana State University AgCenter and Plant Pathology and Crop Physiology Department in Baton Rouge, LA, for planting and rating the 2008 test in Louisiana; Debbie Dalton, G. Kelly O’Brien and Maynard Douglas at the University of Florida’s North Florida Research and Education Center in Quincy, FL; Billy Mills at the University of Georgia’s Attapulgus Research and Education Center in Attapulgus, GA; and Malcomb Pegues at Auburn University’s Gulf Coast Research and Extension Center in Fairhope, AL.
Funding Information:
This research was funded by the USDA-ARS, the Georgia Agricultural Experiment Stations, and United Soybean Board projects. The 2015 field test was also supported with funding from the USDA National Plant Disease Recovery System (NPDRS).
Publisher Copyright:
© 2022, This is a U.S. Government work and not under copyright protection in the US; foreign copyright protection may apply.
PY - 2022/9
Y1 - 2022/9
N2 - Key message: Eight soybean genomic regions, including six never before reported, were found to be associated with resistance to soybean rust (Phakopsora pachyrhizi) in the southeastern USA. Abstract: Soybean rust caused by Phakopsora pachyrhizi is one of the most important foliar diseases of soybean [Glycine max (L.) Merr.]. Although seven Rpp resistance gene loci have been reported, extensive pathotype variation in and among fungal populations increases the importance of identifying additional genes and loci associated with rust resistance. One hundred and ninety-one soybean plant introductions from Japan, Indonesia and Vietnam, and 65 plant introductions from other countries were screened for resistance to P. pachyrhizi under field conditions in the southeastern USA between 2008 and 2015. The results indicated that 84, 69, and 49% of the accessions from southern Japan, Vietnam or central Indonesia, respectively, had negative BLUP values, indicating less disease than the panel mean. A genome-wide association analysis using SoySNP50K Infinium BeadChip data identified eight genomic regions on seven chromosomes associated with SBR resistance, including previously unreported regions of Chromosomes 1, 4, 6, 9, 13, and 15, in addition to the locations of the Rpp3 and Rpp6 loci. The six unreported genomic regions might contain novel Rpp loci. The identification of additional sources of rust resistance and associated genomic regions will further efforts to develop soybean cultivars with broad and durable resistance to soybean rust in the southern USA.
AB - Key message: Eight soybean genomic regions, including six never before reported, were found to be associated with resistance to soybean rust (Phakopsora pachyrhizi) in the southeastern USA. Abstract: Soybean rust caused by Phakopsora pachyrhizi is one of the most important foliar diseases of soybean [Glycine max (L.) Merr.]. Although seven Rpp resistance gene loci have been reported, extensive pathotype variation in and among fungal populations increases the importance of identifying additional genes and loci associated with rust resistance. One hundred and ninety-one soybean plant introductions from Japan, Indonesia and Vietnam, and 65 plant introductions from other countries were screened for resistance to P. pachyrhizi under field conditions in the southeastern USA between 2008 and 2015. The results indicated that 84, 69, and 49% of the accessions from southern Japan, Vietnam or central Indonesia, respectively, had negative BLUP values, indicating less disease than the panel mean. A genome-wide association analysis using SoySNP50K Infinium BeadChip data identified eight genomic regions on seven chromosomes associated with SBR resistance, including previously unreported regions of Chromosomes 1, 4, 6, 9, 13, and 15, in addition to the locations of the Rpp3 and Rpp6 loci. The six unreported genomic regions might contain novel Rpp loci. The identification of additional sources of rust resistance and associated genomic regions will further efforts to develop soybean cultivars with broad and durable resistance to soybean rust in the southern USA.
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U2 - 10.1007/s00122-022-04168-y
DO - 10.1007/s00122-022-04168-y
M3 - Article
C2 - 35902398
AN - SCOPUS:85137958905
SN - 0040-5752
VL - 135
SP - 3073
EP - 3086
JO - Theoretical and Applied Genetics
JF - Theoretical and Applied Genetics
IS - 9
ER -