Shoot and root dry weight in drought exposed tomato populations
Abstract
This research was conducted with the aim to among forty-one tested tomato (Lycopersicon esculentum Mill) populations distinguish those tolerant to limited water supply. Tolerance assessments were performed by using sixteen drought stress selection indices calculated on the basis of tomato shoot and root dry weight yields determined at water stress and non-stress conditions. Populations were differentiated in groups using the method of cluster analysis. The pot experiment was set in controlled greenhouse conditions and comprised optimally irrigated control and drought treatment (35.0 and 20.9% volumetric soil water content, respectively), imposed at the phase of intensive vegetative growth. The experiment was conducted at the Institute for Vegetable Crops in Smederevska Palanka, Serbia. The analyzed tomatoes exhibited significant differences in terms of response to limited irrigation, which had more pronounced effect on shoot dry weight than on the roots (average decrease of 64.4 and 35....7%, respectively). Consequently, root fraction in the total dry weight increased at drought for 68.2% on average. Shoot and root dry weights were positively correlated at optimal irrigation but not in drought, implying genotypic differences in terms of root adjustments to stress conditions. As for the calculated selection indices, substantial variation was found among the populations enabling their ranking in terms of drought tolerance. Since ranking was not the same in all cases, clustering the populations was performed taking into account all sixteen selection indices. The results of this analysis indicate that populations designated with numbers 126, 124, 131, 125, 128, 105, 101, 138, 110, 132 and 109 in Institute for Vegetable Crops germplasm collection exhibit satisfactory level of drought tolerance at vegetative phase and therefore may be used as parents in breeding programs.
Keywords:
drought / stress selection indices / tomato / vegetative growthSource:
Genetika-Belgrade, 2014, 46, 2, 495-504Publisher:
- Društvo genetičara Srbije, Beograd
Funding / projects:
- Biotechnological approaches for overcoming effects of drought on agricultural production in Serbia (RS-MESTD-Technological Development (TD or TR)-31005)
- Integrating biotechnology approach in breeding vegetable crops for sustainable agricultural systems (RS-MESTD-Technological Development (TD or TR)-31059)
DOI: 10.2298/GENSR1402495B
ISSN: 0534-0012
WoS: 000342659500015
Scopus: 2-s2.0-84968831664
Collections
Institution/Community
FiVeRTY - JOUR AU - Brdar-Jokanović, Milka AU - Girek, Zdenka AU - Pavlović, Suzana AU - Ugrinović, Milan AU - Zdravković, Jasmina PY - 2014 UR - http://fiver.ifvcns.rs/handle/123456789/1321 AB - This research was conducted with the aim to among forty-one tested tomato (Lycopersicon esculentum Mill) populations distinguish those tolerant to limited water supply. Tolerance assessments were performed by using sixteen drought stress selection indices calculated on the basis of tomato shoot and root dry weight yields determined at water stress and non-stress conditions. Populations were differentiated in groups using the method of cluster analysis. The pot experiment was set in controlled greenhouse conditions and comprised optimally irrigated control and drought treatment (35.0 and 20.9% volumetric soil water content, respectively), imposed at the phase of intensive vegetative growth. The experiment was conducted at the Institute for Vegetable Crops in Smederevska Palanka, Serbia. The analyzed tomatoes exhibited significant differences in terms of response to limited irrigation, which had more pronounced effect on shoot dry weight than on the roots (average decrease of 64.4 and 35.7%, respectively). Consequently, root fraction in the total dry weight increased at drought for 68.2% on average. Shoot and root dry weights were positively correlated at optimal irrigation but not in drought, implying genotypic differences in terms of root adjustments to stress conditions. As for the calculated selection indices, substantial variation was found among the populations enabling their ranking in terms of drought tolerance. Since ranking was not the same in all cases, clustering the populations was performed taking into account all sixteen selection indices. The results of this analysis indicate that populations designated with numbers 126, 124, 131, 125, 128, 105, 101, 138, 110, 132 and 109 in Institute for Vegetable Crops germplasm collection exhibit satisfactory level of drought tolerance at vegetative phase and therefore may be used as parents in breeding programs. PB - Društvo genetičara Srbije, Beograd T2 - Genetika-Belgrade T1 - Shoot and root dry weight in drought exposed tomato populations EP - 504 IS - 2 SP - 495 VL - 46 DO - 10.2298/GENSR1402495B ER -
@article{ author = "Brdar-Jokanović, Milka and Girek, Zdenka and Pavlović, Suzana and Ugrinović, Milan and Zdravković, Jasmina", year = "2014", abstract = "This research was conducted with the aim to among forty-one tested tomato (Lycopersicon esculentum Mill) populations distinguish those tolerant to limited water supply. Tolerance assessments were performed by using sixteen drought stress selection indices calculated on the basis of tomato shoot and root dry weight yields determined at water stress and non-stress conditions. Populations were differentiated in groups using the method of cluster analysis. The pot experiment was set in controlled greenhouse conditions and comprised optimally irrigated control and drought treatment (35.0 and 20.9% volumetric soil water content, respectively), imposed at the phase of intensive vegetative growth. The experiment was conducted at the Institute for Vegetable Crops in Smederevska Palanka, Serbia. The analyzed tomatoes exhibited significant differences in terms of response to limited irrigation, which had more pronounced effect on shoot dry weight than on the roots (average decrease of 64.4 and 35.7%, respectively). Consequently, root fraction in the total dry weight increased at drought for 68.2% on average. Shoot and root dry weights were positively correlated at optimal irrigation but not in drought, implying genotypic differences in terms of root adjustments to stress conditions. As for the calculated selection indices, substantial variation was found among the populations enabling their ranking in terms of drought tolerance. Since ranking was not the same in all cases, clustering the populations was performed taking into account all sixteen selection indices. The results of this analysis indicate that populations designated with numbers 126, 124, 131, 125, 128, 105, 101, 138, 110, 132 and 109 in Institute for Vegetable Crops germplasm collection exhibit satisfactory level of drought tolerance at vegetative phase and therefore may be used as parents in breeding programs.", publisher = "Društvo genetičara Srbije, Beograd", journal = "Genetika-Belgrade", title = "Shoot and root dry weight in drought exposed tomato populations", pages = "504-495", number = "2", volume = "46", doi = "10.2298/GENSR1402495B" }
Brdar-Jokanović, M., Girek, Z., Pavlović, S., Ugrinović, M.,& Zdravković, J.. (2014). Shoot and root dry weight in drought exposed tomato populations. in Genetika-Belgrade Društvo genetičara Srbije, Beograd., 46(2), 495-504. https://doi.org/10.2298/GENSR1402495B
Brdar-Jokanović M, Girek Z, Pavlović S, Ugrinović M, Zdravković J. Shoot and root dry weight in drought exposed tomato populations. in Genetika-Belgrade. 2014;46(2):495-504. doi:10.2298/GENSR1402495B .
Brdar-Jokanović, Milka, Girek, Zdenka, Pavlović, Suzana, Ugrinović, Milan, Zdravković, Jasmina, "Shoot and root dry weight in drought exposed tomato populations" in Genetika-Belgrade, 46, no. 2 (2014):495-504, https://doi.org/10.2298/GENSR1402495B . .