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Journal of Heredity Advance Access originally published online on September 21, 2006
Journal of Heredity 2006 97(5):429-437; doi:10.1093/jhered/esl024
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© The American Genetic Association. 2006. All rights reserved. For permissions, please email: journals.permissions@oxfordjournals.org.

Genetic Analysis of Resistance to Soybean Mosaic Virus in J05 Soybean

Cuiming Zheng, Pengyin Chen, and Rose Gergerich

From the Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, AR 72701 (Zheng and Chen); and Department of Plant Pathology, University of Arkansas, Fayetteville, AR 72701 (Gergerich)

Address correspondence to P. Chen at the address above, or e-mail: pchen{at}uark.edu.

Soybean cultivar J05 was identified to be resistant to the most virulent strain of soybean mosaic virus (SMV) in northeastern China. However, the reaction of J05 to SMV strains in the United States of America is unknown, and genetic information is needed to utilize this germplasm in a breeding program. The objectives of this study were to determine the reaction of J05 to all US strains of SMV (G1–G7), the inheritance of SMV resistance in J05, and the allelic relationship of resistance genes in J05 with other reported resistance genes. J05 was crossed with susceptible cultivar Essex (rsv) to study the inheritance of SMV resistance. J05 was also crossed with PI 96983 (Rsv1), L29 (Rsv3), and V94-5152 (Rsv4) to test the allelism of resistance genes. F2 populations and F2:3 lines from these crosses were inoculated with G1 or G7 in the greenhouse. Inheritance and allelism studies indicate that J05 possesses 2 independent dominant genes for SMV resistance, one at the Rsv1 locus conferring resistance to G1 and necrosis to G7 and the other at the Rsv3 locus conditioning resistance to G7 but susceptibility to G1. The presence of both genes in J05 provides resistance to G1 and G7. J05 is unique from the previous sources that carry 2 genes of Rsv1Rsv3 and will be useful in breeding for SMV resistance.


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