Table 2.

Comparison of phenotypic assays used to detect quantitative trait loci (QTLs) in apricot cultivars and Prunus davidiana P1908.

Cross name	Population structure	Effective size	PPV strain	Inoculation*	Replicates	Phenotypic scoring‡	Reference
‘Polonais’ × ‘Stark Early Orange’	F1	84–104	PPV‐D RB 3.30	iR	3	Scale (0–3)	Lambert et al. (2007)
‘Lito’ × ‘Lito’	F2	81	PPV‐D RB 3.30	iB	12†	R/S†	Soriano et al. (2008)
‘Goldrich’ × ‘Currot’	F1	81	PPV‐D RB 3.30	iB	12†	R/S†	Soriano et al. (2008)
‘SD40’ × ‘SD40’	F2	68–69	PPV‐M ‘Vallier’	igB	3	Scale (0–4)	Marandel et al. (2009)
‘LE‐3246’ × ‘Vestar’	BC1	67	PPV‐M	iS	0	R/S	Lalli et al. (2008)
‘Harlayne’ × ‘Marlén’	F1	140–145	PPV‐Rec	iS	0	Scale (0–4)	Present study

^* iR, rootstocks are inoculated; iB, budsticks are inoculated before grafting on the rootstock; igB, budsticks are inoculated after grafting on the rootstock; iS, seedlings are inoculated.

^† 12 replicates were observed, but individuals were classified as resistant or susceptible.

^‡ Scoring range used or two‐category scoring. R/S, resistant vs. susceptible.