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Updated: Apr 4, 2026

Semi-High Throughput Screening for Potential Drought-tolerance in Lettuce Lactuca sativa Germplasm Collections
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Multi-trait selection for drought-tolerant soybean accessions under contrasting water regimes.

Tenena Silue1,2, Bunmi Olasanmi3, Adeyinka Saburi Adewumi2

  • 1Pan African University Life and Earth Science Institute, University of Ibadan, Ibadan, Nigeria.

Plos One
|April 2, 2026
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This study identified superior soybean varieties resilient to water stress, crucial for improving crop yields in drought-prone regions. SY150 showed exceptional stability, highlighting effective breeding strategies for drought tolerance.

Area of Science:

  • Agricultural Science
  • Plant Breeding
  • Genetics

Background:

  • Soybean (Glycine max) yield is significantly reduced by water stress, especially during flowering and pod-filling.
  • Developing drought-tolerant soybean varieties is critical for food security in water-scarce regions.

Purpose of the Study:

  • To evaluate soybean accessions for water-deficit tolerance using multi-trait selection.
  • To identify high-yielding and resilient soybean genotypes for sub-Saharan Africa.

Main Methods:

  • Assessed 150 soybean accessions under well-watered and intermittent water-stressed conditions.
  • Utilized multi-trait genotype-ideotype distance index (MGIDI) and drought tolerance indices for selection.
  • Analyzed genetic variation, heritability, and trait correlations across water regimes.

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Main Results:

  • Significant genetic variation and heritability were found for all evaluated traits.
  • Grain yield under stress positively correlated with non-stress yield; hundred-seed weight was consistently associated with yield.
  • MGIDI and drought tolerance indices identified 30 superior accessions per regime, with eight consistently outstanding. SY150 was the most stable genotype.

Conclusions:

  • Integrating MGIDI with drought tolerance indices effectively selects for both yield potential and stress resilience.
  • Identified soybean accessions are promising for advancing water-deficit-tolerant breeding programs in sub-Saharan Africa.