Table 1.

Collected sweetpotato samples in this study

2011		2012**		2013		2014
Region	No. samples collected	Region	No. samples collected	Region	No. samples collected	Region	No. samples collected
Muan*	452	Yeongam	40	Yeongam	34	Yeongam	29
		Haenam	10	Haenam	127	Haenam	377
		Muan	37	Iksan	117	Muan	31
		Iksan	16	Kimje	62	Iksan	139
		Kimje	14	Nonsan	77	Kimje	93
		Nonsan	13	Cheongju	184	Nonsan	299
		Boryeong	4	Yeoju	212	Cheongju	134
		Cheongju	7			Yeoju	126
		Yeoju***	549
		Sancheong	3
		Sacheon	10
Total	452		703		813		1,228

^*Collected from the “Bioenergy Crop Research Institute”.

^**Fields survey results were obtained from reports of Kwak et al (2014).

^***Collected from the “Yeoju-si Agriculture Technical Center”. ^* and ^*** both of them were surveyed virus infection status for the sweetpotato germplasm of Korea.