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

This Article 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 Similar articles in ISI Web of Science Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via ISI Web of Science (1) Citing Articles via Google Scholar Google Scholar Articles by Yang, W. Articles by Weaver, D. B. Search for Related Content PubMed Articles by Yang, W. Articles by Weaver, D. B. Agricola Articles by Yang, W. Articles by Weaver, D. B. Related Collections Soybean Plant Disease Crop Genetics

PLANT GENETIC RESOURCES

Resistance to Frogeye Leaf Spot in Maturity Groups VI and VII of Soybean Germplasm

Dep. of Agronomy and Soils, Auburn Univ. and Alabama Agric. Exp. Stn., Auburn, AL 36849

Corresponding author (dweaver{at}acesag.auburn.edu)

Frogeye leaf spot (FLS) (caused by Cercospora sojina Hara) is an important foliar disease in many soybean [Glycine max (L.) Merr.] production areas of the world. It can cause severe yield losses, but can be completely managed with genetic resistance. Three dominant genes for resistance have been reported. However, the fungus is known to be genetically variable, and in the past, new races have developed that were capable of infecting previously resistant genotypes. Finding additional sources of resistance may reduce the impact of new virulent races. The objective of this study was to evaluate all available soybean plant introductions in maturity groups VI and VII for resistance to FLS. Plants were inoculated with C-32, an isolate of C. sojina, in the greenhouse. Genotypes were rated on a scale of 0 to 6 on the basis of percent leaf area infected with lesions. Six hundred sixty (39.3%) of the accessions received a rating of 3 or lower, and were identified as resistant. Twelve accessions remained completely disease free after repeated inoculation, thus were considered highly resistant or immune. There appears to be adequate resistance to FLS within the germplasm collection, and many of these may have unique resistance genes.

Abbreviations: FLS, frogeye leaf spot • MG, maturity group

This article has been cited by other articles:

				A. M. Missaoui, D. V. Phillips, and H. R. Boerma DNA Marker Analysis of 'Davis' Soybean and Its Descendants for the Rcs3 Gene Conferring Resistance to Cercospora sojina Crop Sci., May 31, 2007; 47(3): 1263 - 1270. [Abstract] [Full Text] [PDF]