Journal ArticleDOI
Molecular mapping of soybean aphid resistance genes in PI 567541B
TLDR
Two quantitative trait loci (QTLs) controlling the aphid resistance were found using the composite interval mapping method and could be useful in improving soybean aphid resistant genes by marker-assisted selection.Abstract:
The soybean aphid (Aphis glycines Matsumura) is an important pest of soybean [Glycine max (L.) Merr.] in North America since it was first reported in 2000. PI 567541B is a newly discovered aphid resistance germplasm with early maturity characteristics. The objectives of this study were to map and validate the aphid resistance genes in PI 567541B using molecular markers. A mapping population of 228 F3 derived lines was investigated for the aphid resistance in both field and greenhouse trials. Two quantitative trait loci (QTLs) controlling the aphid resistance were found using the composite interval mapping method. These two QTLs were localized on linkage groups (LGs) F and M. PI 567541B conferred resistant alleles at both loci. An additive × additive interaction between these two QTLs was identified using the multiple interval mapping method. These two QTLs combined with their interaction explained most of the phenotypic variation in both field and greenhouse trials. In general, the QTL on LG F had less effect than the one on LG M, especially in the greenhouse trial. These two QTLs were further validated using an independent population. The effects of these two QTLs were also confirmed using 50 advanced breeding lines, which were all derived from PI 567541B and had various genetic backgrounds. Hence, these two QTLs identified and validated in this study could be useful in improving soybean aphid resistance by marker-assisted selection.read more
Citations
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Achievements and Challenges in Legume Breeding for Pest and Disease Resistance
Diego Rubiales,Sara Fondevilla,Weidong Chen,Laurent Gentzbittel,Thomas J. V. Higgins,María Ángeles Castillejo,Karam B. Singh,Nicolas Rispail +7 more
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References
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Journal ArticleDOI
Empirical threshold values for quantitative trait mapping.
TL;DR: An empirical method is described, based on the concept of a permutation test, for estimating threshold values that are tailored to the experimental data at hand, and is demonstrated using two real data sets derived from F(2) and recombinant inbred plant populations.
Journal ArticleDOI
MapChart: Software for the Graphical Presentation of Linkage Maps and QTLs
TL;DR: MapChart is a software package that takes as input the linkage and QTL data and generates charts of linkage maps andQTLs and is exported as vector graphics rather than bitmaps, which makes them easy to rescale and to edit further if desired.
Journal ArticleDOI
Precision mapping of quantitative trait loci.
TL;DR: A new method of QTL mapping is proposed and analyzed in this paper by combining interval mapping with multiple regression, an interval test in which the test statistic on a marker interval is made to be unaffected by QTLs located outside a defined interval.
Journal ArticleDOI
Insect resistance in crop plants.
TL;DR: Taxonomy of Vascular Plants George H. M. Lawrence & Maurice Caullery provides a source of information on theory, principles, & operating procedures in plant taxonomy plus an accounting of all families of plants of North America.