Association of RFLP markers with loci conferring broad-based resistance to the soybean cyst nematode (Heterodera glycines)

Soybean cyst nematode (SCN) is a major soybean yield-limiting pest. The present study was conducted to map broad-based SCN resistance loci from the cultivar 'Hartwig'. Two-hundred F(2:3) lines derived from the cross 'Williams 82' x 'Hartwig' were screened with a fourth-...

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Bibliographic Details
Published in:Theoretical and applied genetics 1996, Vol.92 (1), p.83-86
Main Authors: Vierling, R.A, Faghihi, J, Ferris, V.R, Ferris, J.M. (Purdue Univ., Lafayette (USA). Indiana Crop Improvement Association and Dept. of Agronomy)
Format: Article
Language:English
Subjects:
Biological and medical sciences
CARTE GENETIQUE
Classical genetics, quantitative genetics, hybrids
Fundamental and applied biological sciences. Psychology
GENE
GENES
Genetics of eukaryotes. Biological and molecular evolution
GLYCINE MAX
HETERODERA GLYCINES
MAPAS GENETICOS
POLIMORFISMO GENETICO
POLYMORPHISME GENETIQUE
Pteridophyta, spermatophyta
RESISTANCE AUX ORGANISMES NUISIBLES
RESISTENCIA A LAS PLAGAS
RFLP
Vegetals
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Summary:Soybean cyst nematode (SCN) is a major soybean yield-limiting pest. The present study was conducted to map broad-based SCN resistance loci from the cultivar 'Hartwig'. Two-hundred F(2:3) lines derived from the cross 'Williams 82' x 'Hartwig' were screened with a fourth-generation SCN inbred and 56 polymorphic molecular markers. Allele states and phenotypes were analyzed using stepwise regression and the model selection was made at P below 0.01. Four unlinked RFLP markers (A006, A567, A487, A 112) were associated with SCN resistance and the partial coefficient of determinations (R2) were 91%, 1%, 1%, and 1%. We have mapped a new, major SCN resistance locus (A006) and three minor loci (A567, A487, A112). This complete mapping will accelerate the transfer of broad-based resistance without linkage drag and aid in the determination of relationships among various SCN-resistant germplasm sources.
ISSN:0040-5752
1432-2242
DOI:10.1007/BF00222955