HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Figures Only Full Text Free Full Text (PDF) Free Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Hyten, D. L. Articles by Cregan, P. B. Search for Related Content PubMed Articles by Hyten, D. L. Articles by Cregan, P. B. Agricola Articles by Hyten, D. L. Articles by Cregan, P. B. Related Collections Cell Biology & Molecular Genetics Crop Genetics Soybean

GENOMICS, MOLECULAR GENETICS & BIOTECHNOLOGY

Map Location of the Rpp1 Locus That Confers Resistance to Soybean Rust in Soybean

^a USDA-ARS, Soybean Genomics and Improvement Lab., Beltsville, MD 20705
^b USDA-ARS, Dep. of Crop Sciences, Univ. of Illinois, Urbana, IL 61801
^c USDA-ARS, Foreign Disease-Weed Science Research Unit (FDWSRU), Ft. Detrick, MD 21702
^d Monsanto Co., St. Louis, MO 63167
^e J.M. Narvel, Monsanto Co., Galena, MD 21635

^* Corresponding author (creganp{at}ba.ars.usda.gov).

Soybean rust (SBR), caused by Phakopsora pachyrhizi, was first discovered in North America in 2004 and has the potential to become a major soybean [Glycine max (L.) Merr.] disease in the USA. Currently, four SBR resistance genes have been identified but not mapped on the soybean genetic linkage map. One of these resistance genes is the Rpp1 gene, which is present in the soybean accession PI 200492. The availability of molecular markers associated with Rpp1 will permit marker-assisted selection and expedite the incorporation of this gene into U.S. cultivars. We compared simple sequence repeat (SSR) markers between ‘Williams 82’ and the BC₅ Williams 82 isoline L85-2378, which contains the Rpp1 resistance allele from the soybean accession PI 200492, for candidate regions that might contain Rpp1. One candidate region was found with the SSR marker BARC_Sct_187 on linkage group G. A population of BC₆F_2:3 lines segregating for the Rpp1 resistance locus was genotyped in this region on linkage group G followed by inoculation with the P. pachyrhizi isolate India 73-1 in the USDA-ARS Biosafety Level 3 Plant Pathogen Containment Facility at Ft. Detrick, MD. The Rpp1 gene was mapped between SSR markers BARC_Sct_187 and BARC_Sat_064 on linkage group G.