NaCl tolerance in Lycopersicon pennellii introgression lines: QTL related to physiological responses
Frary, A., Izmir Inst.of Technology (Turkey). Dept. of Molecular Biology and Genetics | Keles, D., Alata Horticultural Research Inst., Erdemli (Turkey) | Pinar, H., Alata Horticultural Research Inst., Erdemli (Turkey) | Goel, D., Izmir Inst.of Technology (Turkey). Dept. of Molecular Biology and Genetics | Doganlar, S., Izmir Inst.of Technology (Turkey). Dept. of Molecular Biology and Genetics
The growth and ion content of salt sensitive Lycopersicon esculentum cv. M82 and salt tolerant L. pennellii accession LA716 were examined under both control and stress conditions (150 mM NaCl). L. esculentum grew more vigorously than L. pennellii under optimal conditions, however, L. pennellii was able to maintain its growth better than cultivated tomato when the plants were exposed to salinity. Sodium content of both L. esculentum and L. pennellii increased as a result of NaCl stress. In addition, both species showed reduced K and Ca content due to salinity. The physiological traits were also measured in a population of 52 L. pennellii introgression lines grown under both normal and stress conditions. A total of 311 quantitative trait loci (QTL) were identified for the studied traits: plant height, stem diameter, leaf number, leaf and root fresh and dry mass, and Na, K and Ca contents. Some of the loci (124) were identified under both control and stress conditions while 86 QTL were identified only under non-stress conditions, and 101 loci were identified only under NaCl stress.
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