In 2006, Cambodian Agriculture Research and Development Institute (CARDI) bred a high-quality tomato ‘Neang Pich’ variety. Since ‘Neang Pich’ is susceptible to Sclerotium rolfsii (S. rolfsii), it is severely affected the production major tomato growing regions. This study was conducted to evaluate the effect of seven S. rolfsii tolerant rootstocks on growth and yield in graft cultivation of ‘Neang Pich’ tomato. ‘Neang Pich’ seedlings were used as scion and non-grafted control. Six eggplant genotypes (‘2017053’, ‘2017062’, ‘17CJVC2’, ‘No. 80’, ‘VI041979A’, ‘VI041996’) and a commercial tomato variety (‘Hulk’) were used as rootstock. The grafted and non-grafted tomatoes were grown in a plastic greenhouse and open field. The survival rate of plants did not differ between plastic greenhouse (80.2%) and open field (79.5%). The top and root fresh weight of plants grown in a plastic greenhouse increased by 77% and 11% compared to the open field and the dry weight increased by 48% and 10%, respectively. The top (309 g) and root (18.9 g) fresh weight, and the top (90.5 g) and root (6.39 g) dry weight depending on rootstock were the highest in plants grafted onto ‘2017062’. The yield of tomatoes in a plastic greenhouse (19.5 MT/ha) was 65% higher than that of open field (11.8 MT/ha). The yield of tomatoes depending on rootstock were the highest in ‘2017062’ (17.8 MT/ha). The effect of cultivation practice and grafting on pH and sugar content (oBrix) of the fruit was non-significant difference (p0.05). The scion diameter, top fresh weight, fruit weight and yield (MT/ha) were significant difference (p0.05) in the interaction effect between tomato cultivation practices (plastic greenhouse and open field) and rootstock.

양파의 웅성불임을 이용한 고랭지 지역 재배에 적합한 장일형 일대잡종 품종, ‘대관황’을 2007년 고령지농업연구센터에서 육성하였다. ‘대관황’은 ‘만추황’의 웅성불임친을 모친으로, ‘NIHA-5001’을 부친으로 하여 2001년 교배하여 육성하였다. 교배 후 ‘고시가-1호’로 명명 후 2003년에 생산력검정 예비시험을 거쳐 2004년부터 2006년까지 생산력 검정 본시험을 고랭지 3개 지역에서 실시하였다. ‘대관황’의 초형은 직립이며 숙기는 중만생형이다. ‘대관황’의 구중은 시판품종인 ‘히구마’와 비슷하며 구형은 원형이며 구피색은 황갈색으로 ‘히구마’ 보다 저장성이 뛰어난 특성을 가지고 있다. ‘대관황’은 ‘히구마’에 비해 가용성 고형분이 높고, 건물중은 비슷하여 저장성이 뛰어나 고랭지 지역 재배에 적합한 품종으로 판단된다. 그러나 고랭지지역은 해발 600 m부터 800 m의 다양한 지역에 위치하고 있어 다양한 환경 변이가 있으므로 대면적 재배 전 지역적응성을 검토하는 것이 좋을 것으로 판단된다.