Abstract
This research was carried out to selection of desirable cultivar for organic cultivation of carrot in Korea. The assay of disease resistance, insect tolerance and rate of bolting were investigated on 32 cultivars of genetic resources of carrot. This experiment was carried out at experimental field and greenhouse of Gangneung-Wonju National University. 'PI 223360' was resistant against powdery mildew. Ten cultivars including 'Oxheart Carrot Heirloom' were moderately resistant, 22 cultivars including 'Long Impeator #58' were susceptible to powdery mildew. Although there was no resistant cultivar against black rot and leaf blight, our results showed that several cultivars have moderate resistance. Thirteen cultivars including 'Oxheart Carrot Heirloom' were having insect (Erythroplusia pyropia) tolerance and 'SA 102' and 'Scarlet Keeper Carrot Rare' were susceptible. According to the investigation of bolting, 6 cultivars including 'Hongsim Ouchon Carrot' were early bolting and 4 cultivars including 'Japanese Imperial Long Carrot' were moderate bolting. Other cultivars were identified as late bolting. From above results, we confirmed that 'Oxheart Carrot Heirloom' was suitable cultivar for organic cultivation among 32 genetic resources of carrot.
국내 당근 유기재배를 위한 저항성 품종 선발을 목적으로 한 실험에서는 당근 유전자원 32품종을 이용하여 병저항성(흰가루병, 검은무늬병, 검은잎마름병) 검정, 내충성 및 추대 정도를 조사하였다. 흰가루병 스크리닝 결과 'PI 223360'이 저항성이었으며, 'Oxheart Carrot Heirloom'를 포함한 10개의 품종이 중도저항성이었고 'Long Impeator #58'을 포함한 22품종이 감수성인 것으로 나타났다. 당근 검은무늬병과 검은잎마름병의 스크리닝 결과 모든 품종이 저항성을 나타내진 않았지만, 몇몇 품종이 중도저항성을 가진 것으로 확인되었다. 내충성을 조사한 결과 'Oxheart Carrot Heirloom'를 포함한 13품종이 내충성인 것으로 조사되었으며, 'Nantes Coreless Carrot'을 포함한 11개의 품종들이 중간정도를 나타냈으며 'SA 102'와 'Scarlet Keeper Carrot Rare'은 감수성인 것으로 조사되었다. 추대조사 결과에서는 'Hongsim Ouchon Carrot'을 포함한 6개의 품종이 이른 추대를 보였으며, 'Japanese Imperial Long Carrot'를 포함한 4개 품종이 중간 추대를 나머지는 만추대성인 것을 확인하였다. 이상의 결과를 근거로 'Oxheart Carrot Heirloom'이 조사한 32개 당근 유전자원 중 유기재배를 위한 품종으로 선발되었다.
