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 HighWire Citing Articles via Google Scholar Google Scholar Articles by Terry, L.I. Articles by Lark, K.G. Search for Related Content PubMed Articles by Terry, L.I. Articles by Lark, K.G. Agricola Articles by Terry, L.I. Articles by Lark, K.G.

CROP BREEDING, GENETICS & CYTOLOGY

Soybean Quantitative Trait Loci for Resistance to Insects

^a Dep. of Biology, University of Utah, Salt Lake City, UT 84112 USA
^b Dept. of Agronomy and Plant Genetics, University of Minnesota, St. Paul, MN 55108 USA
^c Facultad de Agronomia, Universidad Catholica de Valpariso, Casilla 4-D, Quillota, Chile

terry{at}biology.utah.edu

Resistance to insects was found in a recombinant inbred (RI) population of soybean derived from nonresistant parents, `Minsoy' and `Noir 1' (MN) (240 RI). The objectives of this study were to determine quantitative trait loci (QTLs) associated with this resistance by linkage to either restriction fragment length polymorphism (RFLP) or simple sequence repeat (SSR) markers and to confirm these loci in a new population derived from Minsoy crossed with the elite cultivar Archer (MA) (233 RI). Corn earworm (Helicoverpa zea Boddie) larvae were reared on individual lines of the MN and MA RI and several larval traits were measured. Of the 20 linkage groups (LG) of the composite genetic soybean map, QTLs were found on five LGs in the MN and four in the MA population. The QTL on LG U2 is associated with major effects on larval development in both the MN (r² > 0.12) and the MA population (r² > 0.28). All other QTLs had lesser effects (r² < 0.10). The U2 QTL associated with resistance to insects is of major importance in that: (i) it has been identified in different genetic backgrounds; (ii) it is associated with several larval growth parameters; and (iii) it explains a large proportion of the phenotypic variation. All other QTLs were observed to segregate in only one population. Most of the resistance alleles were associated with the Minsoy parent. Consistent with this observation, Archer and Noir 1 were better corn earworm larval host plants than Minsoy.

Abbreviations: cM, centimorgans • QTLs, quantitative trait loci • RI, recombinant inbreds • RFLP, restriction fragment length polymorphism • SSR, simple sequence repeat • MA, Minsoy x Archer cross • MN, Minsoy x Noir1 cross • LG, linkage group • LOD, log of the odds

This article has been cited by other articles:

				C. B. Hill, Y. Li, and G. L. Hartman A Single Dominant Gene for Resistance to the Soybean Aphid in the Soybean Cultivar Dowling Crop Sci., May 18, 2006; 46(4): 1601 - 1605. [Abstract] [Full Text] [PDF]

				K. Komatsu, S. Okuda, M. Takahashi, R. Matsunaga, and Y. Nakazawa QTL Mapping of Antibiosis Resistance to Common Cutworm (Spodoptera litura Fabricius) in Soybean Crop Sci., August 26, 2005; 45(5): 2044 - 2048. [Abstract] [Full Text] [PDF]

				S. R. M. Pinson, F. M. Capdevielle, and J. H. Oard Confirming QTLs and Finding Additional Loci Conditioning Sheath Blight Resistance in Rice Using Recombinant Inbred Lines Crop Sci., January 31, 2005; 45(2): 503 - 510. [Abstract] [Full Text] [PDF]