Comparative experiment on the resistance of tomato yellow leaf curl virus in Hotan Area
To screen high resistance tomato varieties to yellow leaf curl virus disease in Hotan area,and provide a basis for the prevention and control of yellow leaf curl virus disease in tomato facilities and the selection of resistant varieties.The results showed that all tested varieties were infected by chlorotic leaf curl virus at different levels.The plant height,stem diameter and leaf number among tomato varieties decreased with the increase of incidence rate and disease index of chlorotic leaf curl virus.The chlorophyll relative content(SPAD value),leaf net photosynthetic rate(Pn),and yield of Temete 36 were the highest,with no significant difference compared with Youla 578 and Dongfeng 199,but significantly higher than other treatments.Varieties Diana,Youla 578,Dongfeng 199,Aofen 1,Fenna,and Ellis had relative disease resistance indices ranging from 0.86 to 0.99,which were highly resistant varieties.Based on comprehensive analysis of disease resistance,plant traits,leaf photosynthetic parameters,and yield,the varieties Temeite 36,Dongfeng 199,and Youla 578 showed better performance,making them the preferred varieties for resistance to yellow leaf curl virus disease in autumn greenhouse tomato crops in Hotan,Xinjiang.