Recent advances in quantitative trait loci (QTL) analysis have facilitated studies on Ascochyta blight, caused by Ascochyta rabiei Pass (Lab.), resistance in chickpea (Cicer arietinum L.). Using a recombinant inbred line (RIL) population derived from an interspecific cross between C. arietinum and C. reticulatum, the same 2 QTLs conferring resistance to Ascochyta blight were identified at 2 locations by interval mapping. Genotype X environment (G x E) interaction was significant both between years at the same location and between locations. The effect of QTL-1 on linkage group 8 (LG-8) was greater than that of QTL-2 on LG-4 at Pullman while the effect of QTL-2 was higher than that of QTL-1 at Eskişehir. Dissection of QTLs with molecular markers provides a better understanding of resistance to Ascochyta blight in chickpea. Validation of both QTLs in a second environment promises the application of marker-assisted selection (MAS) for this trait. Changes in magnitudes of the QTL's effect in 2 locations indicate possible differences in pathogen populations and environmental interactions.
Chickpea, Ascochyta blight, quantitative trait locus, recombinant inbred line, molecular markers
TEKEOĞLU, MÜCELLA; IŞIK, MUZAFFER; and MUEHLBAUER, FRED J. (2004) "QTL Analysis of Ascochyta Blight Resistance in Chickpea," Turkish Journal of Agriculture and Forestry: Vol. 28: No. 3, Article 6. Available at: https://journals.tubitak.gov.tr/agriculture/vol28/iss3/6