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Assessment of Drought Tolerance of Miscanthus Genotypes through Dry-Down Treatment and Fixed-Soil-Moisture-Content Techniques

Author

Listed:
  • Tzu-Ya Weng

    (Graduate School of Global Food Resources, Hokkaido University, Sapporo 0600809, Hokkaido, Japan)

  • Taiken Nakashima

    (Research Faculty of Agriculture, Hokkaido University, Sapporo 0608589, Hokkaido, Japan)

  • Antonio Villanueva-Morales

    (Department of Statistics, Mathematics and Computing, Forest Sciences Division, Universidad Autónoma Chapingo, Texcoco 56230, Mexico)

  • J. Ryan Stewart

    (Department of Plant and Wildlife Sciences, Brigham Young University, Provo, UT 84604, USA
    Field Science Center for Northern Biosphere, Hokkaido University, Sapporo 0600811, Hokkaido, Japan
    Global Center for Food, Land and Water Resources, Hokkaido University, Sapporo 0608589, Hokkaido, Japan)

  • Erik J. Sacks

    (Field Science Center for Northern Biosphere, Hokkaido University, Sapporo 0600811, Hokkaido, Japan
    Department of Crop Sciences, University of Illinois, Urbana-Champaign, Urbana, IL 61801, USA)

  • Toshihiko Yamada

    (Field Science Center for Northern Biosphere, Hokkaido University, Sapporo 0600811, Hokkaido, Japan
    Global Center for Food, Land and Water Resources, Hokkaido University, Sapporo 0608589, Hokkaido, Japan)

Abstract

Miscanthus , a high-yielding, warm-season C 4 grass, shows promise as a potential bioenergy crop in temperate regions. However, drought may restrain productivity of most genotypes. In this study, total 29 Miscanthus genotypes of East-Asian origin were screened for drought tolerance with two methods, a dry-down treatment in two locations and a system where soil moisture content (SMC) was maintained at fixed levels using an automatic irrigation system in one location. One genotype, Miscanthus sinensis PMS-285, showed relatively high drought-tolerance capacity under moderate drought stress. Miscanthus sinensis PMS-285, aligned with the M. sinensis ‘Yangtze-Qinling’ genetic cluster, had relatively high principal component analysis ranking values in both two locations experiments, Hokkaido University and Brigham Young University. Genotypes derived from the ‘Yangtze-Qinling’ genetic cluster showed relatively greater photosynthetic performance than other genetic clusters, suggesting germplasm from this group could be a potential source of drought-tolerant plant material. Diploid genotypes showed stronger drought tolerance than tetraploid genotypes, suggesting ploidy could be an influential factor for this trait. Of the two methods, the dry-down treatment appears more suitable for selecting drought-tolerant genotypes given that it reflects water-stress conditions in the field. However, the fixed-SMC experiment may be good for understanding the physiological responses of plants to relatively constant water-stress levels.

Suggested Citation

  • Tzu-Ya Weng & Taiken Nakashima & Antonio Villanueva-Morales & J. Ryan Stewart & Erik J. Sacks & Toshihiko Yamada, 2021. "Assessment of Drought Tolerance of Miscanthus Genotypes through Dry-Down Treatment and Fixed-Soil-Moisture-Content Techniques," Agriculture, MDPI, vol. 12(1), pages 1-18, December.
    • Handle: RePEc:gam:jagris:v:12:y:2021:i:1:p:6-:d:708454
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    Citations

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    Cited by:

    1. Daniele Del Buono & Luca Regni & Primo Proietti, 2023. "Abiotic Stresses, Biostimulants and Plant Activity," Agriculture, MDPI, vol. 13(1), pages 1-5, January.

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