Seedling salt tolerance in tomato

Abstract

Soils with higher concentrations of salt are becoming more and more a constraint for many crops to obtain high yields. Wild tomato species, adapted to adverse environments, are a potential reservoir for genes underlying quantitative trait loci (QTL) related to salt tolerance in tomato. In this study two introgression line (IL) libraries derived from two different wild species, Solanum pennellii LA716 and Solanum lycopersicoides LA2951, were used to identify QTLs for salt tolerance in the seedling stage. In the S. pennellii IL library, four major QTLs were identified on chromosomes 6, 7 and 11. In the S. lycopersicoides IL library, six major QTLs were discovered which are located on chromosomes 4, 6, 9 and 12. Co-localization of QTLs on chromosome 6 in the two IL libraries and previously reports hinted that this locus might be conserved in the tomato crop. Three S. pennellii ILs (IL6-2, IL7-1 and IL7-5) harboring QTLs on chromosome 6 and 7 were crossed. Semi-dominance and dominance were shown for these three QTLs, and non-additive and epistatic interactions between them were observed.

Relationship between survival and yield related traits in Solanum pimpinellifolium under salt stress

“…There is evidence that the genetic basis of salt tolerance in crop plants is complex involving heterotic, dominant, semi-dominant, additive, non-additive, and epistatic effects (Flowers 2004;Li et al 2011). Monforte et al (1997) reported that salt tolerance in S. pimpinellifolium accessions (L1 and L5) is characterized by higher fruit number, total fruit weight and mean fruit weight under saline condition, which is controlled by several QTLs with epistatic and heterotic effects.…”

Assessment of salinity tolerance in tomato cultivars grown in Maharashtra, India.

“…Increment in saline areas is due to low rainfall, high evaporation, native rocks, saline irrigation water, poor water management and disproportionate use of chemical fertilizers (Dasgan et. al., 2002;Mahajan and Tuteja, 2005;Li et. al., 2011).…”

Research Article: Effects of salt stress on capsaicin content, growth, and fluorescence in a Jalapeño cultivar ofCapsicum annuum(Solanaceae)

“…Although much research has been conducted to examine the effects of soil salinity on halophytic plant species (Ungar, 1991), more recent research has focused on salt tolerance among food crops, including chili peppers (van der Beek and Ltifi, 1991) and tomatoes (Li et al, 2011), two closely related members of the Solanaceae.…”