TRAITS RELATED TO DROUGHT TOLERANCE IN TOMATO ACCESSIONS OF DIFFERENT GROWTH TYPE AND FRUIT SIZE

This study was undertaken to investigate the possibilities for breeding drought tolerant tomatoes of different growth type and fruit size. The effects of drought were analyzed and the relationships among the observed traits at optimal irrigation and drought were interpreted using biplot analysis. Greenhouse pot experiment included 40 tomato accessions grown under optimal irrigation and drought (volumetric soil water content 35.0% and 20.9%), designed in complete randomized blocks. Observations were made at the intensive vegetative growth phase. The selection criterion for drought tolerance was plant dry weight. The accessions differed in: the whole plant, shoot and root dry weight, root proportion in plant dry weight (RP), plant height, number of leaves below the first flower branches (NL), number of lateral branches, and the first and second order lateral branches length. Drought resulted in significant decline, with the exceptions of the increased RP and NL. Determinate and indeterminate tomatoes were not significantly different in drought tolerance, implying that both types may be bred for tolerance to the stress; however, the accessions of larger fruit size had comparatively higher water requirements. Results of the biplot analysis indicated that drought tolerance in tomato does not necessarily have to be associated with robust root system and therefore the indirect selection strategy may rely on shoot traits.

[1]  T. Koshiba,et al.  Overexpression of RSOsPR10, a root-specific rice PR10 gene, confers tolerance against drought stress in rice and drought and salt stresses in bentgrass , 2016, Plant Cell, Tissue and Organ Culture (PCTOC).

[2]  P. Galindo,et al.  Tomato fruit quality as influenced by the interactions between agricultural techniques and harvesting period , 2014 .

[3]  A. Waheed,et al.  EFFECT OF DIFFERENT WATER REGIMES ON BIOMETRIC TRAITS OF SOME TOLERANT AND SENSITIVE TOMATO GENOTYPES , 2014 .

[4]  X. Liu,et al.  Effect of water stress on yield and nutrition quality of tomato plant overexpressing StAPX , 2014, Biologia Plantarum.

[5]  L. Qin,et al.  Screening of Tomato Inbred-Lines for Drought Tolerance at Germination and Seedling Stage , 2013 .

[6]  A. Ashok Kumar,et al.  Phenotyping for Plant Breeding: Applications of Phenotyping Methods for Crop Improvement , 2013 .

[7]  J. Labate,et al.  Genotype and environmental interaction for fruit quality traits in vintage tomato varieties , 2013, Euphytica.

[8]  P. Kumar,et al.  Phenotyping of Tomatoes , 2013 .

[9]  S. U. Siddiqui,et al.  GENOTYPIC DIFFERENCES AGAINST PEG SIMULATED DROUGHT STRESS IN TOMATO , 2013 .

[10]  K. Nahar,et al.  Morphological and Physiological Characters of Tomato (Lycopersicon esculentum Mill) Cultivars under Water Stress , 2012 .

[11]  G. Nedelea,et al.  Research concerning drought tolerance in some tomato seedling genotypes , 2012 .

[12]  R. Gardner,et al.  GGE Biplot Analysis of Tomato F1 Hybrids Evaluated Across Years for Marketable Fruit Yield , 2011 .

[13]  F. Nuez,et al.  Evaluation and selection of tomato accessions (Solanum section Lycopersicon) for content of lycopene, β-carotene and ascorbic acid. , 2010 .

[14]  Kazuo Shinozaki,et al.  Research on plant abiotic stress responses in the post-genome era: past, present and future. , 2010, The Plant journal : for cell and molecular biology.

[15]  P. Dharmatti,et al.  Effect of drought on growth attributes of tomato (Lycopersicon esculentum Mill.) genotypes. , 2010 .

[16]  M. Ashraf,et al.  Inducing drought tolerance in plants: recent advances. , 2010, Biotechnology advances.

[17]  J. Richards,et al.  Drought response in self-compatible species of tomato (Solanaceae). , 2009, American journal of botany.

[18]  Muhammad Aslam Pervez,et al.  Effect of drought stress on growth, yield and seed quality of tomato (Lycopersicon esculentum L.). , 2009 .

[19]  V. Martínez,et al.  Hormonal changes in relation to biomass partitioning and shoot growth impairment in salinized tomato (Solanum lycopersicum L.) plants , 2008, Journal of experimental botany.

[20]  Rodney B. Thompson,et al.  Effects of salinity on fruit yield and quality of tomato grown in soil-less culture in greenhouses in Mediterranean climatic conditions , 2008 .

[21]  M. Foolad.  Current Status Of Breeding Tomatoes For Salt And Drought Tolerance , 2007 .

[22]  Weikai Yan,et al.  Biplot analysis of multi-environment trial data: Principles and applications , 2006 .

[23]  G. T. Dodds,et al.  Effects of water stress at different growth stages on greenhouse tomato yield and quality , 2003 .