Note resistant plant on left and susceptible plant
on the right. DSI's for resistant plants were 2 to 2.5 and susceptible
plants 3.5 to 4.Goal: Tagging resistance genes from L. hirsutum
Project leader: Luis Mejia, Universidad de San Carlos
From cross of GF lines with susceptible lines, resistance from L. hirsutum was dominant and may be one major gene. The susceptible parent HC7880, which is the open pollinated cultivar. About 100 plants of the F2 population (GF2 x HC7880) were planted and symptoms were very evident at 30 days on some plants. At 85 days, fruit were collected from the 8 most resistant plants and the 8 most susceptible plants in March 2003.
Note resistant plant on left and susceptible plant
on the right. DSI's for resistant plants were 2 to 2.5 and susceptible
plants 3.5 to 4.
[Back to Field Tests, March 03] [Breeding tomatoes for resistance to geminiviruses in Guatemala]