토마토 대목용 품종 ‘파워가드’ 육성

‘Powerguard’ was developed from three-way crosses between two bacterial wilt resistant cultivars and a Fusarium wilt resistant line. In 2007, a F1 hybrid, ‘6TS72S’ was obtained from a cross between ‘B-barrier’ (Takii Seed Co.) and ‘B-blocking’ (Takii Seed Co.). Both parental lines were resistant to bacterial wilt. To stack Fusarium wilt resistance gene, ‘6TS72S’ was crossed with ‘07-9-47’. Two generations were proceeded per year by selecting individuals resistant to both bacterial and Fusarium wilt. For selection, bacterial wilt inoculation, and Fusarium wilt molecular marker tests were applied. Superior progenies were selected through progeny tests and the resistance characteristics were fixed through generation advancement during 2009 (F2~F3) and 2010 (F4~F5). In 2011, an inbred line (F6) with bacterial and Fusarium wilt resistance along with uniformity and stability were obtained and designated as ’Powerguard’. The cultivar ‘Powerguard’ is resistant not only to bacterial wilt and but to Fusarium wilt (I3), root knot nematode (Rex), tomato mosaic virus (ToMV), alternaria stem canker (Asc1) and tomato yellow leaf curl virus (Ty3). ‘Powerguard’ shows indeterminate growth and has round-shaped fruits with average 40 g weight and 4.2oBrix sugar content.