Scholarly article on topic 'The Use of Stress Tolerance Indices for the Selection of Tolerant Inbred Lines and their Correspondent Hybrids under Normal and Water-stress Conditions'

The Use of Stress Tolerance Indices for the Selection of Tolerant Inbred Lines and their Correspondent Hybrids under Normal and Water-stress Conditions Academic research paper on "Agriculture, forestry, and fisheries"

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Procedia Environmental Sciences
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{"stress tolerance" / indices / "B value" / "plant yield potential" / maize / "inbred lines" / hybrids}

Abstract of research paper on Agriculture, forestry, and fisheries, author of scientific article — Fokion Papathanasiou, Christos Dordas, Fotis Gekas, Chrysanthi Pankou, Elissavet Ninou, et al.

Abstract Drought is a major cause of yield loss for many important crops including maize. Therefore, the development and release of drought tolerant varieties that will yield well under a broad range of environmental conditions is an important breeding goal. Several stress indices have been developed, aiming to assist identification and selection of stable, high-yielding, drought tolerant genotypes. A novel equation (B value) that predicts crop yield potential of a genotype at normal farming densities has been also suggested1. The estimation of B value relies on plant yield potential at ultra-low densities and on the coefficient of variation (CV) of individual plants. The present study aimed to investigate the tolerance of inbred lines and their correspondent hybrids using stress tolerant indices and compare them with the B values. Therefore, we used thirty one maize inbred lines and their correspondent hybrids under ultra-spaced and highly dense and under two different water regimes (normal and drought conditions) in three different areas in Greece during the 2012 and 2013 growing season, respectively. The inbred lines and the hybrids were evaluated using grain yield and for each genotype, B value and nine other stress indices based on their yield under normal and water stress conditions were calculated, including stress susceptibility index (SSI), mean relative performance (MRP), stress tolerance (TOL), mean productivity2 (MP), relative efficiency index (REI), stress tolerant index3 (STI), geometric mean of productivity (GMP), yield index (YI) and harmonic mean4 (HM). It was found a strong and positive correlation (P<0.001) of B values with all indices, except SSI, for all experimental locations. These results suggest that B value matches the ability of the other stress indices to identify drought sensitive and tolerant genotypes and is an effective selection criterion for high yielding genotypes with stable performance under variable environmental conditions.

Academic research paper on topic "The Use of Stress Tolerance Indices for the Selection of Tolerant Inbred Lines and their Correspondent Hybrids under Normal and Water-stress Conditions"

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Procedía Environmental Sciences 29 (2015) 274 - 275

Agriculture and Climate Change- Adapting Crops to Increased Uncertainty (AGRI 2015)

The use of stress tolerance indices for the selection of tolerant inbred lines and their correspondent hybrids under normal and

water-stress conditions

Fokion Papathanasioua*, Christos Dordasb, Fotis Gekasb, Chrysanthi Pankoub, Elissavet Ninoub, Ioannis Mylonasb, Konstantinos Tsantarmasc, Iosif Sistanisa, Evangelia Sinapidouc, Anastasios Lithourgidisd, Jovanka-Katarzyna Petrevskaa, Ioannis Papadopoulosa, Paulos Zouliamise, Anastasia Kargiotidouc, Ioannis Tokatlidisc

aTechnological and Education Institute of Western Macedonia, Dept. of Agricultural Technology, Terma Kontopoulou, 53100 Florina, Greece bLaboratory of Agronomy, Faculty of Agriculture, Forestry and Natural Environment, Aristotle University of Thessaloniki, 54124 Greece cDemocritus University of Thrace, Dept. of Agricultural Development, Pantazidou 193, 68200, Orestiada, Greece dDept. of Agronomy, Farm of Aristotle University of Thessaloniki, 57001 Thermi, Greece eAmerican Genetics, Philellinon 17, 57013 Thessaloniki, Greece

Abstract

Drought is a major cause of yield loss for many important crops including maize. Therefore, the development and release of drought tolerant varieties that will yield well under a broad range of environmental conditions is an important breeding goal. Several stress indices have been developed, aiming to assist identification and selection of stable, high-yielding, drought tolerant genotypes. A novel equation (B value) that predicts crop yield potential of a genotype at normal farming densities has been also suggested1. The estimation of B value relies on plant yield potential at ultra-low densities and on the coefficient of variation (CV) of individual plants. The present study aimed to investigate the tolerance of inbred lines and their correspondent hybrids using stress tolerant indices and compare them with the B values. Therefore, we used thirty one maize inbred lines and their correspondent hybrids under ultra-spaced and highly dense and under two different water regimes (normal and drought conditions) in three different areas in Greece during the 2012 and 2013 growing season, respectively. The inbred lines and the hybrids were evaluated using grain yield and for each genotype, B value and nine other stress indices based on their yield under normal and water stress conditions were calculated, including stress susceptibility index (SSI), mean relative performance (MRP), stress tolerance (TOL), mean productivity2 (MP), relative efficiency index (REI), stress tolerant index3 (STI), geometric mean of productivity (GMP), yield index (YI) and harmonic mean4 (HM). It was found a strong and positive correlation (P<0.001) of B values with all indices, except SSI, for all experimental locations. These results suggest that B value matches the ability of the other stress indices to identify drought sensitive and tolerant genotypes and is an effective selection criterion for

1878-0296 © 2015 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

Peer-review under responsibility of the organizing committee of the Agriculture and Climate Change - Adapting Crops to Increased

Uncertainty (AGRI 2015)

doi : 10. 1016/j .proenv.2015.07.279

Fokion Papathanasiou et al. /Procedia Environmental Sciences 29 (2015) 274 - 275

high yielding genotypes with stable performance under variable environmental conditions.

* Corresponding author. Tel.: +30-23850-54615; fax: +30-23850-46630. E-mail address: fokionp@gmail.com

Acknowledgements

Work co-financed by EU (ERDF) and Greek funds through the program code 09 SYN-22-604 "SYNERGASIA2009 - Action I. Cooperative small- and mid-scale projects ".

© 2015TheAuthors. Published byElsevierB.VThisis an open access article under the CC BY-NC-ND license (http://creativecommons.org/hcenses/by-nc-nd/4.0/).

Peer-reviewunderresponsibility oftheorganizing committee of the Agriculture and Climate Change - Adapting Crops to Increased Uncertainty (AGRI 2015)

Keywords:stress tolerance; indices; B value; plant yield potential; maize; inbred lines; hybrids

References

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