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Genetic control of some plant growth characteristics of bread wheat (Triticum aestivum L.) under aluminum stress

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Abstract

Background

Biomass yield is an important trait for wheat breeding programs. Enhancing the yield of the aerial components of wheat cultivars will be an integral part of future wheat improvement. Aluminum (Al) toxicity is one of the main factors limiting wheat growth and production in acid soils, which occur on up to 50% of the arable lands of the world especially in tropical and subtropical regions.

Objective

Our objective was to identify quantitative trait loci (QTL) of plant growth characteristics and yield in wheat.

Methods

A recombinant inbred line (RIL) population consisting of 167 lines, derived from a cross between SeriM82 and Babax were evaluated under two Al treatments (+ Al, 800 µM of Al; −Al, 0 µM of Al) in the field based on an alpha lattice design with two replications for two consecutive crop seasons.

Results

A total of 40 QTLs including nine putative and 31 suggestive QTLs were found for all traits using the composite interval mapping (CIM) method. By mixed model-based composite interval mapping (MCIM) method, 42 additive QTLs and nine pairs of epistatic effects were detected for studied traits, of which 20 additive and six pairs of epistatic QTLs showed significant QTL × environment interactions. Most of the detected QTLs across environments were stable, and the highest number of stable QTLs was related to A genome. Co-localization of QTL was found on linkage groups (LGs) 2B, 4B, 6A-a, and 7A (CIM method) and 2A-d, and 6A-a (MCIM method).

Conclusion

These results have implications for selection strategies in biomass yield and for increasing the yield of the aerial part of wheat following further evaluations in various genetic backgrounds and environments.

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Acknowledgements

The authors are grateful to Darab Agriculture and Natural Resources Research and Education Center for providing the seeds of the SB population and the support in field trials and also Faculty of Agriculture and Natural Resources of Darab to provide laboratory facilities.

Funding

This research did not receive any specific grant from funding agencies in the public, commercial or not-for-profit sectors.

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Authors and Affiliations

Authors

Contributions

B.A.F, S.T, N.M.N and A.M designed the research and edited the manuscript. Thanks to S.T for the help in statistical analysis. Thanks to C.L.M for providing the marker data of SeriM82/Babax population and offering constructive suggestions to improve the manuscript. S.F. performed the experiments, analyzed the data, and wrote the primary draft of the manuscript.

Corresponding authors

Correspondence to Sara Farokhzadeh or Sirous Tahmasebi.

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Conflict of interest

The authors declare that they have no conflict of interests.

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This article does not contain any studies with human participants or animals performed by any of the authors.

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Informed consent was obtained from all individual participants included in the study.

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Farokhzadeh, S., Fakheri, B.A., Nezhad, N.M. et al. Genetic control of some plant growth characteristics of bread wheat (Triticum aestivum L.) under aluminum stress. Genes Genom 42, 245–261 (2020). https://doi.org/10.1007/s13258-019-00895-7

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  • DOI: https://doi.org/10.1007/s13258-019-00895-7

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