Evaluation of drought tolerance in tomato (Solanum lycopersicum) using tolerance indices

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Published: Apr 22, 2016
Keywords:
multivariate analysis, water, , fruit set, drought response

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Marilyn Florido Bacallao
Instituto Nacional Ciencias Agrícolas (INCA)

Abstract

The present work was carried out with the aim of evaluating drought stress tolerance in 28 germplasm accessions of tomato (Solanum L. section Lycopersicon subsection Lycopersicon) ex situ preserved in Cuban collections as well as identifying the most tolerant accessions to be used in plant breeding programs. Thus, crop fruiting percentage was evaluated at the optimal period and under drought conditions (stressful period), which was used to calculate stress criteria: stress susceptibility index (SSI), geometric mean productivity (GMP), mean productivity (MP), stress tolerance index (STI), fruiting index (FI), harmonic mean (HARM), fruiting stability index (FSI), drought tolerance index (DI), stress susceptibility percentage index (SSPI), relative drought index (RDI), sensitivity drought index (SDI), modified stress tolerance indices (MSTI) and abiotic tolerance index (ATI). Accessions were classified according to their drought stress tolerance at plant level based on fruiting percentage, whereas the relationship among tolerance indices was evaluated by Biplot analysis. At the evaluated germplasm, there were accessions with high tolerance indices and fruiting percentages under stressful and non-stressful environments. This indicates that ex situ preserved germplasm in Cuba has tolerant accessions which can be used in breeding programs, in order to obtain adequately-performing cultivars or hybrids under these conditions.

Article Details

How to Cite
Florido Bacallao, M. (2016). Evaluation of drought tolerance in tomato (Solanum lycopersicum) using tolerance indices. Cultivos Tropicales, 37(1), 128–135. Retrieved from https://ediciones.inca.edu.cu/index.php/ediciones/article/view/1177
Issue
Vol. 37 No. 1 (2016)
Section
Original Article

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