Fig. 2. Linkage groups from the framework linkage map (Zhu, 2002) developed on the cross, Ogle/MAM17-5 (OM), showing significant quantitative trait loci (QTL) for crown rust resistance, days to heading and plant height. Map distances are given in Haldane's centi-Morgan. QTL for crown rust resistance are indicated to the right of linkage groups by crosshatch bars (reaction type) and open boxes (rust severity). QTL for days to heading (Hdq) and plant height (Htq) are indicated to the right of linkage groups by lines. Pcq1, Pcq2, and Pcq3 are QTL controlling reaction type. Pcq1, Pcq2, Pcq3 and Pcq4 are QTL controlling rust severity. Molecular markers beginning with letter ‘e’ are AFLP-type, with ‘am’ are SSR-type, and with others are RFLP-type markers.