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. | Turk J Agric For 28 (2004) 183-187 © TÜB‹TAK QTL Analysis of Ascochyta Blight Resistance in Chickpea Mücella TEKEO⁄LU* Anadolu Agricultural Research Institute, . Box 17, 26001 Eskiflehir - TURKEY Muzaffer IfiIK Exporter Union Seed and Research Co. (‹TAfi). Ergazi Mah. Köyiçi Serpmeleri, No: 4 Bat›kent, Ankara - TURKEY Fred J. MUEHLBAUER . Department of Agriculture, Agricultural Research Service and the Department of Crop and Soil Sciences, Washington State University, Pullman, WA 99164-6434, USA Received: Abstract: 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 Eskiflehir. 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. Key Words: Chickpea, Ascochyta blight, quantitative trait locus, recombinant inbred line, molecular markers Nohutta Antraknoza Dayan›kl›l›¤›n Kantitatif Karakter Analizi Özet: Son y›llarda kantitatif karakterleri kontrol eden lokuslar›n (QTL) analizi için gelifltirilen yeni uygulamalar sayesinde nohutta (Cicer arietinum L.), Ascochyta rabiei Pass .
