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Diversity among synthetic backcross-derived wheat (Triticum aestivum L.) lines for drought tolerance

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Abstract

Wheat (Triticum aestivum L.) is predominantly growing in areas where terminal drought stress is the foremost yield-limiting factor. Since genetic variability for drought tolerance is weakened in modern wheat cultivars, exploring the drought tolerance potential of the synthetic backcross-derived wheat lines (SBL) might help to widen genetic diversity for wheat breeders. The variation among 45 selected SBLs in response to drought stress was assessed by measuring physio-agronomic traits under induced drought stress at the reproductive stage in comparison to 5 known drought tolerant commercial wheat varieties as check. The variability among genotypes was verified by analysis of variance, principal component analysis, a heat map, and clustering methods using Ward’s method. The study selected 12 SBLs with significantly higher grain yields than 5 local checks under drought stress. The drought tolerance ability of these selected genotypes was strongly associated with proline, leaf water contents, membrane stability, and better leaf chlorophyll contents under drought stress. The identified tolerant SBLs may prove useful wheat lines for wheat breeders to evolve drought-tolerant wheat varieties.

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The data generated and analyzed during the current study are available from the corresponding author on reasonable request.

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Acknowledgements

The authors acknowledge the financial support from the Agricultural Linkages Program (ALP) of the Pakistan Agricultural Research Council (PARC) for this study.

Funding

This research was funded by the Agricultural Linkages Program (ALP) of the Pakistan Agricultural Research Council (PARC) under Project Number: CS 369.

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M. Sohail perceived, designed the experiment, collected data, analysed the results, and wrote this article. M. Qamar assisted in data collection, laboratory assays and facilitated in conducting of the research. S. Waqar assisted in data collection. I. Hussain served as a research supervisor and aided in obtaining the funding and final review of the manuscript version to be submitted.

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Correspondence to Muhammad Sohail.

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Sohail, M., Qamar, M. & Hussain, I. Diversity among synthetic backcross-derived wheat (Triticum aestivum L.) lines for drought tolerance. Euphytica 218, 138 (2022). https://doi.org/10.1007/s10681-022-03086-w

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  • DOI: https://doi.org/10.1007/s10681-022-03086-w

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