Abstract
QTL analysis was performed using an F1 population derived from a cross between tochiotome and itigotyukanbohonnou2gou (Nou2gou) in order to identify a resistance-related region of the genome of Glomerella cingulata. We used a pseudo-testcross strategy in combination with DNA markers (RAPD, AFLP, SSR) that were segregated 1:1 in F1 populations. The tochiotome map comprised 376 markers distributed among 30 segregation groups (full length, 1005.4 cM). The Nou2gou map comprised 506 markers distributed among 29 segregation groups (full length, 1448.1 cM). As a result of QTL analysis, nine resistance-related regions were detected and mapped among the parent cultivars. In addition, the segregation ratio of markers and groups linked in the repulsion phase analysis suggests that octoploid strawberry cultivars are allopolyploid and display disomic segregation.
