ISSN 2736-1756
Advanced Journal of Microbiology Research Vol. 2005
Available online at http://internationalscholarsjournals.org/journal/ajmr
© 2005 International Scholars Journals
Short Communication
Quantitative trait loci for head-bug resistance in sorghum
M. Deu1, A. Ratnadass2*, M. A. Hamada2, J.L. Noyer3, M. Diabate2† & J. Chantereau4
1CIRAD-CA, UMR 1096/PIA, TA 40/03, F-34398 Montpellier, France.
2ICRISAT-CIRAD, BP 320 Bamako, Mali.
3CIRAD-AMIS, UMR 1096/PIA, TA 40/03, F-34398 Montpellier, France.
4CIRAD-CA, Programme CALIM, TA 73/09, F-34398 Montpellier, France.
Accepted 23 December, 2004
Abstract
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.
Key words: Head-bug, Eurystylus oldi, sorghum, resistance, RFLP, microsatellite, QTL.