The first occurrence of leaf mold of tomato caused by races 4.9 and 4.9.11 of Passalora fulva (syn. Fulvia fulva) in Japan

Abstract

Tomato leaf mold caused by Passalora fulva was found on two tomato varieties carrying the Cf-9 gene in Japan, in 2007. The isolates obtained from Chiba and Fukushima were identified as race 4.9.11, and those from Gunma were races 4.9 or 4.9.11. This is the first report in Japan of tomato leaf mold caused by P. fulva strains that can overcome the Cf-9 gene.

Occurrence of a new race 2.9 of leaf mold of tomato in Japan

“…In Japan, the resistance of cultivars that carry Cf-2, Cf-4, Cf-9, and Cf-11 has been overcome by eight races of P. fulva (Enya et al 2009;Kishi 1962;Ozaki and Shirakawa 1996;Satou et al 2005;Yamada and Abiko 2002). Races that have overcome Cf-9 resistance first occurred in Gunma, Chiba, and Fukushima prefectures in 2007 and were identified as races 4.9 and 4.9.11 (Enya et al 2009).…”

“…Races that have overcome Cf-9 resistance first occurred in Gunma, Chiba, and Fukushima prefectures in 2007 and were identified as races 4.9 and 4.9.11 (Enya et al 2009). In 2008, leaf mold was also found on Cf-9 tomato cultivars in Iwate prefecture, geographically distant from the area where races 4.9 and 4.9.11 have occurred.…”

Occurrence of Leaf Mold Pathogen Fulvia fulva Isolates Infecting Tomato Cf-9 Cultivars in Korea

“…토마토 재배 품종에 도입된 Cf 저항성 유전자는 Cf-2, var. cerasiforme로부터, 그리고 Cf-4는 Lycopersicon habrochaites 로부터 도입되어 잎곰팡이병 저항성 품종을 육성하기 위하 여 이용되고 있다 (Enya et al, 2009;Takken et al, 1998). Cf-4를 감염하는 균주는 race 2.4이다.…”

“…Cf-4를 감염하는 균주는 race 2.4이다. Cf 저항성 유전자가 도입된 토마토 품종이 포장에 재배됨에 따라 병원성이 다른 race를 가진 F. fulva의 발생이 뒤따르게 되어 다양한 race 분화가 지속적으로 보고되고 있다 (Boukema, 1981;Day, 1954;Enya et al, 2009;Laterrot, 1986;Laterrot and Clerjeau, 1979;Laterrot et al, 1985;Lindhout et al, 1989). 일본에서 는 Enya et al(2009)이 기존 발견된 6개의 race(race 0, 2, 4, 2.4, 4.11, 2.4.11)와 Cf-4, Cf-9, Cf-11을 감염하는 2개의 새 로운 race 4.9와 4.9.11을 보고하였으며, 뉴질랜드에서도 race 2.4.5.9를 발견함에 따라 이 잎곰팡이 병원균에 의해 Cf-2, Cf-4, Cf-5와 Cf-9 저항성 유전자가 극복되었다 (Boukema, 1981).…”

“…Cf-9 품종의 잎곰팡이병 저항성을 극복하는 새로운 race는 일본, 네덜란드, 폴란드 등의 세계 각국에서도 지속적으로 보 고되고 있으나 (Enya et al, 2009;Laterrot, 1986;Lindhout ). The infected plants were incubated in humidity chamber at 25°C for 48 hours and then transferred to a growth chamber at 25°C and 80% RH with 12-hour light a day.…”