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Quantitative trait loci for head-bug resistance in sorghum

Deu M., Ratnadass A., Hamada M.A., Noyer J.L., Diabaté M., Chantereau J.. 2005. African Journal of Biotechnology, 4 (3) : p. 247-250.

QTLs were mapped in F2 progeny derived from a cross between the head-bug resistant sorghum cultivar Malisor 84-7 and susceptible S 34. The phenotypic evaluation was conducted in Mali. The mapped population consisted of 217 F2 plants, with 345 homologous and heterologous RFLP probes and 49 microsatellite markers tested. Eighty-one RFLP markers revealed polymorphism between the two parents, and 14 microsatellite markers gave usable amplification products. A genetic map including 92 loci distributed over 13 linkage groups, and covering a total distance of 1160 cM was built. Three significant and seven putative QTLs were detected and placed on the map.

Mots-clés : sorghum bicolor; résistance génétique; marqueur génétique; microsatellite; carte génétique; locus des caractères quantitatifs; rflp; mali; france; eurystylus oldi; qtl

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