Determination of Heat and Drought Tolerant Lines in Segregating Populations Produced by Interspecific Crosses in Eggplant
2022
Cebeci, Esra | Boyacı, H. Filiz | Doğan, Yıldız | Toppıno, Laura | Rotıno, Giuseppe L.
Nowadays abiotic stresses originated by climate change are one of the main factors causing reductions to the agricultural production. Heat and drought are the most prominent abiotic stress factors affecting both eggplant production worldwide and food security. Although eggplant is known as more tolerant to these stresses compared to othervegetables and solanaceous crops, its quality and yield suffers from severe stress conditions. In this research, 256F2 plants developed from the interspecific cross between the wild relative of Solanum insanum L. and the pure line(BATEM-TDC47) from Batı Akdeniz Agricultural Research Institute, (BATEM) eggplant gene pool were used asplant materials. Seedlings at 3-4 true leaves stage bred in three-liter pots filled with a 1:1 mixture of peat and perlitewere subjected to drought stress test to this end, a 75% deficit irrigation was applied to the plants, while control plantswere irrigated with the required amount to recover the 100% of ETp as appropriate management strategy. The stresssymptoms of plants were determined by morphological and chemical analyses. Plant heights were measured on the25th day of the experiment and visual evaluation stress symptoms was observed according to the 0-5 scale. Morphological observations, MDA (malondialdehyde) and proline content of selected plants were performed to confirm theirtolerance levels to heat and drought. Following the drought test, 100 F2 lines, which were selected as drought tolerant,were transferred to the greenhouse for determination of heat tolerant individuals.
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