WB-B33, A NEW FUSARIUM WILT-RESISTANT STRAWBERRY LINE

Fusarium wilt of strawberries (Fusarium oxysporum f. sp. fragariae) was first found in Japan in 1969. It is a very serious disease for cultivated strawberries (Fragaria × ananassa); recently, the damage from this disease has spread to open- culture farming in cooler regions such as Akita Prefecture (40˚N, 139˚E, approximately 200 meters elevation). A new resistant line, ‘WB-B33’ (‘Pajaro’ × ‘Belle Rouge’), bred for open culture by inoculation with a spore suspension (1×10⁶ spores/ml) and in an open field heavily infested with Fusarium oxysporum f. sp. fragariae in 2003, was tested at the experimental farm of Akita Prefectural University and compared with four commercially grown cultivars (control cultivars): ‘Pajaro’, ‘Belle Rouge’, ‘Akita Berry’ and ‘Kitanokagayaki’. The yield of ‘WB-B33’ was 152.4 kg per are (100 m²), which was the same as or higher than that of ‘Belle Rouge’, ‘Pajaro’ and ‘Akita Berry’. The Brix (%) of ‘WB-B33’ was 9.3, which was higher than that of the control cultivars.
The pericarp puncture force of ‘WB-B33’ was 1.12 N (114.2 gf), which was almost the same as that of the control cultivars.
These results demonstrate that the new resistant line, ‘WB-B33’, is very promising as a practical cultivar for open-culture farming as practiced in northern Japan.

XXVII International Horticultural Congress – IHC2006: II International Symposium on Plant Genetic Resources of Horticultural Crops

H. Takahashi, Y. Yoshida, H. Kanda

Fragaria × ananassa, Fusarium wilt-resistance, breeding, open culture

https://doi.org/10.17660/ActaHortic.2007.760.57