Korean Journal of Breeding Science

Resistance level to major viruses and some diseases of ‘Gangseon’.

Variety	Virusz			Common scab resistance			Late blight resistancez

	PVX	PVY	PLRV	Incidence ratex (%)	Incidence indexy	Resistancez	True	Field
Gangseon	R	S	R	61.9	1.8	S	R	R
Dejima	M	M	R	74.2	2.2	S	S	S

^zR: resistant, M: moderate, S: susceptible

^yIncidence index: 0, No lesion; 1, lesion area is below 5%; 2, lesion area 5~10%; 3, lesion area 10~20%; 4, lesion area is above 20%

^xIncidence rate = No. of contaminated tubers /No. of total tubers investigated×100