Resistance to Northern Root-knot Nematode, Meloidogyne hapla, in Peony Strains

당근뿌리혹선충에 대한 작약계통의 저항성 검정

This study was carried out to screen 11 peony varieties collected for resistance to northern root-knot nematode, Meloidogyne hapla. The larval population of Meloidogyne halpa to the Uisongjakyak, Taebaekjakyak, Doseo, EP368, EP512 peony were detected high denisties with individuals of 98-173 per 300 ml soil, but Sabeol, Yongsu, Kimchon, Pl23 peony showed low number of larvar with 21-60. The root rot were lowered in Yongsu, Kimchon peony than Uisongjakyak, Taebaekjakyak, EP368, EP512. It seems to involved with densities of 2nd juvernile population in that rot rate of root was increased as increase of 2nd stage larvae. Two peony, Uisongjakyak, Taebaekjakyak were susceptable to M. hapla with high egg mass formation which showed 49,28 in each root. And Yongsu, Doseo, EP368, EP512 were Mid resistance with 1-15 egg mass of each root. Whereas Sabeol, Kimchon, Pl23, EP337, EP425 were found to be resistant to M, hapla with few egg mass formation of 4-7 each root.

작약계통에 대한 당근뿌리혹선충의 저항성검정에서, 의성작약, 태백작약 도서종, EP368, EP512는 효충의 밀도가 토양 300m1당 121-173마리로 높았으며 사벌종, 웅수종, 김천종, Pl23에서는 21-60마리로 타계통 보다 기생밀도가 낮았다. 공신된 계통별 작약 뿌리의 부패정도는 용수종, 김천종에서 경징하였으며, 선충의 기생이 많았던 의성작약, 태백작약 Ep368, Ep512는 선충의 기생밀도도 높았으며 뿌리 부패율이 아주 높았다. 작약계통별 당근뿌리혹선충에 대한 저항성정도를 보면 의성작약, 태백작약 용수종, 도서종, EP368, EP512는 난낭의 형성이 많아 당근뿌리혹선충에 감수성이였고, 사벌종과 김천종, Pl23, EP337, EP425는 난낭형성이 매우 낮아 저항성을 나타내었다.