Cross Pollination of Tomatoes

POLLINATION RELATIONS OF LYCOPERSICON ESCULENTUM IN NATIVE AND FOREIGN REGIONS

“…Position of the stigma as a factor affecting NCP relations in the tomato has been recognized previously by Lesley (1924), who discovered much higher rates in the variety Magnus having stigmas exserted 1.4 mm. than in the variety Dwarf Champion, which has stigmas' depressed 1.0 mm.…”

Spontaneous outcrossing in tomato depends on cultivar and environment and varies between individual flowers

“…Very limited evidence was available on genotypic variation. Lesley () observed largely differing outcrossing rates for the cultivars ‘Magnus’ (4.9%) and ‘Dwarf Champion’ (0.59%). The results presented here are in a similar range: no outcrossing was observed in 13 cultivar–location combinations in 2005 (Table ); the highest value was 5.23% in ‘Rosa Roma’ 2006 (Table ).…”

“…Flower morphology can help to understand genotypic differences and to identify genotypes that may be prone to outcrossing. According to Lesley (), ‘Magnus’ had long styles, on average protruding 1.4 mm from the anther cone and ‘Dwarf Champion’ had short styles with the stigmata usually 1 mm inside the anther cone. A high outcrossing rate was observed in a genotype with protruding stigma in the Punjab (Singh et al., ) 9.3% in 25 m distance from a pollen donor and 6.6% at 50 m. In ‘Rosa Roma’, protruding stigmata were observed.…”

“…Very limited scientific evidence is available for European conditions: no outcrossing (0%) was observed in Central and Southern Italy (Ilardi & Barba, ). An effect of the cultivar on outcrossing rates has been observed (Lesley, ), but evidence is scarce.…”

“…Outcrossing was calculated in cultivars of the potato‐leaf type which were grown surrounded by cultivars of the cut‐leaf type. The cut‐leaf trait, also named tomato leaf, is typical for most tomato cultivars and monogenetic dominant over potato‐leaf (Lesley, ). Thus, all cut‐leaf seedlings derived from a potato‐leaf mother plant are the result of outcrossing.…”