Identification of resistance loci toward Phytophthora sojae in South Korean soybean plant introductions 407974B and 424487B

Autor: Leah K. McHale, Carlos Bolanos-Carriel, Amine Batnini, Anne E. Dorrance
Přispěvatelé: United Soybean Board, National Institute of Food and Agriculture (US), Ohio Soybean Council, The Ohio State University
Rok vydání: 2021
Předmět:
Zdroj: Digital.CSIC. Repositorio Institucional del CSIC
instname
ISSN: 1435-0653
0011-183X
DOI: 10.1002/csc2.20596
Popis: Phytophthora root and stem rot is a major constraint to soybean [Glycine max (L.) Merr.] production worldwide. Deployment of single dominant Resistance to Phytophthora sojae (Rps) genes are an effective management strategy for this disease. However, due to increasing diversity in P. sojae populations for pathotype, new effective Rps genes are needed. Two recombinant inbred line (RIL) populations, each derived from a cross with Williams (susceptible) and resistant accessions PI 407974B and PI 424487B, were evaluated for resistance with one or more P. sojae pathotypes: OH1 (vir 7), OH4 (vir 1a, 1c, 7), OH7 (vir 1a, 3a, 3c, 4, 5, 6, 7), OH25 (vir 1a, 1b, 1c, 1k, 7), and 1.S.1.1 (1a, 1b, 1k, 2, 3a, 3c, 4, 5, 6, 7, 8). Molecular maps were assembled with BARCSoySNP6K BeadChip, simple-sequence repeat, and Kompetitive Allele Specific polymerase chain reaction markers. A total of three Rps loci were mapped, one near Rps1 on Chromosome 3 and two near Rps4/6 on chromosome 18. Quantitative trait loci and straight linkage maps confirmed the loci. Resistance to P. sojae pathotypes 1.S.1.1 and/or OH7 was mapped to Chromosome 3 in the PI 407974B RIL population. PI 407974B and PI 424487B RIL populations have Rps loci on chromosome 18 toward OH4 and OH25, respectively, which are near the Rps4/6 region. Although these PIs may have novel Rps genes/alleles and could assist in the deployment and pyramiding of resistance against P. sojae, care should be taken because these may condition defense reactions to some P. sojae pathotypes but not to all.
Funding for this project was provided by the United Soybean Board, the Ohio Soybean Council, and the Ohio State University Center for Applied Plant Sciences, College of Food, Agricultural and Environmental Sciences, Center for Soybean Research. In addition, we wish to acknowledge support from the Molecular Cellular Imaging Center at Ohio Agricultural Research and Development Center. Salaries and research support for this project was provided by State and Federal Funds appropriated to the Ohio Agricultural Research and Development Center, The Ohio State University and the National Institute of Food and Agriculture, USDA, Hatch projects Development of Disease Management Strategies for Soybean Pathogens in Ohio OHO01303 and Genetic Analysis of Soybean Added-Value Traits and Soybean Variety Development for Ohio OHO01279.
Databáze: OpenAIRE
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