Relationship among membrane thermostability, cell viability and tolerancecriteria on the evaluation of heat tolerance in tomato(Solanum L. section Lycopersicon subsection Lycopersicon)

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Published: Jul 4, 2012
Keywords:
tomato, heat tolerance, cell membranes, temperature, viability

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Marilyn Florido Bacallao
Instituto Nacional de Ciencias Agrícolas

Abstract

This work was developed in order to know ifthere exists any heat tolerance variability in a representativesample of ex situ-preserved tomato (Solanum L. sectionLycopersicon subsection Lycopersicon) germplasm fromCuban collections and to identify the most tolerant accessionsto be used in plant breeding programs. Thus, the followingstatistical parameters were calculated: average, range andcoefficient of variation of cell membrane thermostability (TMC)and cell viability (VC), tested at tissue level, as well as of thecharacters and tolerance criteria: potential fruit set (FP), fruitset under stress conditions (FE), stress geometric fruit set(FGE), tolerance (TOL), stress susceptibility index (ISE), stresstolerance value (ITE), and relative tolerance index (ITR),evaluated at plant level. It was also assessed the relationshipexisting among them, by means of estimating coincidence indexof the best and worst accessions, and the correlation betweenthem. It was proved that tissue-level evaluations, especiallyTMC, had high rates of coincidence and positive correlationwith tolerance criteria at plant level, mainly with ITE or FGE,determining 18 accessions, which were coincidentally classifiedas heat-tolerant through every indicator evaluated, that areproposed as parents in plant breeding programs for heattolerance in the crop.

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How to Cite
Florido Bacallao, M. (2012). Relationship among membrane thermostability, cell viability and tolerancecriteria on the evaluation of heat tolerance in tomato(Solanum L. section Lycopersicon subsection Lycopersicon). Cultivos Tropicales, 32(1), 54–61. Retrieved from https://ediciones.inca.edu.cu/index.php/ediciones/article/view/54
Issue
Vol. 32 No. 1 (2011)
Section
Original Article

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