BioMed Research International

Review Article

The Venturia Apple Pathosystem: Pathogenicity Mechanisms and Plant Defense Responses

Table 3

List of apple R-genes imparting scab resistance.


S.N.	R-Gene		Sourc /host	Linkage group	Resistance respons	Molecular marker (Distance from the gene in cM)	Reference
	Old name	New name

1	V_a	Rvi10	Antonovka Type PI 172623 Differential host: h10	LG-1	Class 1	B398480 (16)	[37]
2	V_b	Rvi12	Hansen’s baccata #2 Differential host: h12	LG-12 (Distal end)	Class 2 to 3b	Hi02d05 (7.8) Hi07f01(13.7)	[37]
3	Vbj	Rvi11	Malus baccata jackii Differential host: h11	LG-2 (Distal end)	Class 0 to 3b	CH05e03 (0.6) T6 (3.9)	[37]
4	V_d	Rvi13	Durello di Forli Differential host: h13	LG-10 (Proximal end)	Class 2	OPAF07-880 (2.0) CH2b07 (9.0)	[37]
5	Vd₃		1980-015-025	LG1	—	CH-Vf1 (1) 67005F17 (7)	[63]
6	Vdg	Rvi9	J34; Differential host: h9	—	—		[64]
7	—	Rvi14	Dülmener Rosenapfel Differential host: h14	LG-6 (Proximal end)	Class 2	HB09TC (5)	[65]
8	V_f	Rvi6	“Priscilla” Differential host: h6	LG-1 (Distal end)	Class 0 to 3b	M18 (0.2) CH-Vf1 (0.0) AL07 (0.9)	[37]
9	V_fh	Rvi7	Malus floribunda 821 Differential host: h7	LG-8	Class 1		[66]
10	V_g	Rvi1	Golden Delicious Differential host: h1	LG-12 (Distal end)	Class 2	MC105 (3.0) CH01D03 (0.5)	[37]
11	V_h2	Rvi2	Malus pumila R12740-7A (TSR34T15) Differential host: h2	LG-2 (Distal end)	Class 2	OPL 19 ₄₃₃(1) Ch02b10 (8)	[37]
12	Vh3.1	Rvi3	Q71; Differential host: h3	—	—		[64]
13	V_h4/V_r1	Rvi4	Malus pumila R12740-7A (TSR33T239) Differential host: 4	LG-2 (Distal end)	Class 1	S22 (4) CH02c02 (5)	[37]
14	V_h8	Rvi8	Malus sieversii W193B Differential host: 8	LG-2 (Distal end)	Class 2	OPL19 (1.3)	[37]
15	V_m	Rvi5	Malus micromalus 245-38, Malus atrosanguinea 840 Differential host: h5	LG-17 (Distal end)	Class1	OPB12 (6)	[67]
16	V_r2	Rvi15	GMAL 2473 Differential host: h15	LG-2 (Proximal end)	Class 0 to 2	CH02c02a (0.0)	[37]

The apple cultivar from where the gene has been isolated.
The characteristics of resistance response imparted by these R genes on apple against scab infection. Class 0: no symptoms; Class 1: pit type hypersensitive response like reactions; Class 2: irregular edged chlorotic lesions with slight necrotic center with no sporulation; Class 3a: chlorotic and necrotic lesions with rare sporulation; Class 3b: prominent sporulations with chlorotic and necrotic lesions.