A new soybean rust resistance allele from PI 423972 at the Rpp4 locus

被引：0
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作者：
Zachary R. King
Silas P. Childs
Donna K. Harris
Kerry F. Pedley
James W. Buck
H. Roger Boerma
Zenglu Li
机构：
[1] University of Georgia,Institute of Plant Breeding, Genetics and Genomics
[2] United States Department of Agriculture-Agricultural Research Service (USDA-ARS) Foreign Disease-Weed Science Research Unit,Department of Plant Pathology
[3] University of Georgia,undefined
来源：
Molecular Breeding | 2017年 / 37卷
关键词：
Bulked segregant analysis (BSA); Haplotype analysis; Linkage mapping; Resistance to ; (; ) gene; Single-nucleotide polymorphism (SNP); Soybean rust (SBR);
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摘要：
Phakopsora pachyrhizi is a fungal pathogen and the cause of Asian soybean rust. P. pachyrhizi was first detected in the continental USA in 2004 and has since been a threat to the soybean industry. There are six described loci that harbor resistance to P. pachyrhizi (Rpp) genes. The resistance of PI 423972 was previously shown to be within 5 cM of the Rpp4 locus of PI 459025B, yet had differential reactions when challenged with P. pachyrhizi isolates India 1973 and Taiwan 1972. In this study, the resistance of PI 423972 was mapped to a 187.5 kb interval between the SNP markers GSM0543 and GSM0387 on chromosome 18 (51,397,064 to 51,584,617 bp, Glyma.Wm82.a2) that overlaps the interval for Rpp4 and is designated as Rpp4-b. A unique haplotype is described for PI 423972 that separates it from PI 459025B, 32 North American soybean ancestors, and all described sources of Rpp gene resistance.
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