Fig 1.
An intraspecific genetic map for watermelon constructed using an F2 population from the cross ‘Arka Manik’ × ‘TS34’ and the location of 3 major QTLs for powdery mildew resistance (PMR), seed size (SS), and fruit shape index (FSI) identified by interval mapping (IM).
Chromosomes 1 to 11 are according to [4]. Numbers on the left side correspond to the distance in cM from the top of each chromosome. QTL positions were defined by the interval of the strongest linked markers flanking the QTL. Major QTL for PMR, SS, and FSI are represented by the blue, red, and green color, respectively.
Table 1.
Distribution of molecular markers and major QTLs among 14 linkage groups constructed using an F2 population from the cross ‘Arka Manik’ and ‘TS34’.
Fig 2.
PMR phenotypic distribution of F2 progeny from the cross ‘Arka Manik’ × ‘TS34’.
Table 2.
QTL mapping results for PMR, SS, and FSI in the F2 population from the cross ‘Arka Manik’ × ‘TS34’.
Table 3.
Primers for the major QTL-flanking markers shown in Table 2.
Table 4.
R genes and FS-related genes detected from chromosomes with PMR and FSI major QTLs, and SNPs in these gene between ‘Arka Manik’ and ‘TS34’.
The genes and SNPs for which PCR markers were developed are underlined.
Table 5.
Putative candidate gene-based markers located on major QTL regions for PMR and FS.
Fig 3.
Genetic mapping of two NBS-LRR gene-based markers and a SUN gene homolog-based marker, and composite interval mapping (CIM) of QTLs associated with powdery mildew resistance (PMR), seed size (SS), and fruit shape index (FSI) on Chr02 and Chr03.
In QTL LOD graphs, LOD thresholds for 133 F2 plants is 4.2.