UTILIZATION OF WILD TOMATO RELATIVE FOR THE DEVELOPMENT OF IMPROVED TOMATO LINES FOR HIGH HUMIDITY ENVIRONMENT
ABSTRACT
An effort to obtain a tomato cultivar that would adapt to high temperature and high humidity
condition in the southern part of Nigeria in order to increase tomato yield in this part
of the country has been in progress for the past nine years (2000-2008).The research
was carried out at the Faculty of Agriculture Research Farm, University of Nigeria,
Nsukka located in the derived savanna zone latitude 0.6o52, N, longitude 07o 24, E,
447.26 m altitude. Three cultivated tomato varieties (Solanum lycopersicon) Roma
VF, Tropica (Derica), Nsukka Local and a wild relative, Solanum pimpinellifolium
and their progenies were used in the study for the development of a novel tomato
cultivar for commercial production. The results of the frequency distributions of the
parents and progenies showed continuous variation in fruit size thus suggesting fruit
size in tomato as a polygenic trait that is controlled by multiplicative gene action.
Genetic progress made over the generations equally revealed that highest genetic gain
was obtained at the F11 generation over all the generations studied with a decline at
the F12 generation.
