ISSN:
1432-2242
Schlagwort(e):
Key words Resistance genes
;
Soybean cyst nematode
;
Hartwig
;
RFLP mapping
;
PI 437654
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Biologie
Notizen:
Abstract 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 lines derived from the cross ‘Williams 82’בHartwig’ 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 . Four unlinked RFLP markers (A006, A567, A487, A112) 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.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1007/s001220050096
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