Plant Science Research Uncovers Insights into Wheat Crop Resilience

Strategic Insights -

Scientists at Banda University of Agriculture and Technology conducted a study to assess the impact of climate change on wheat crops, specifically focusing on temperature and drought stress. The research, published in Frontiers in Plant Science, aimed to understand the effects of heat and combined heat-drought stress on wheat production and identify potential sources of tolerance. The study involved evaluating 34 landraces and elite cultivars of Triticum spp. across different environments, revealing significant genotype x environment interactions.

Key Takeaways:

  • The study found that climate change poses a serious threat to food security, with heat and drought stress affecting wheat crop production and productivity.
  • The research identified genotypes Local-17, HI-8802, HI-8713, DBW 187, HI-8777, Raj 4120, and PDW 274 as tolerant to both heat and combined heat-drought stress.
  • PDW 274 was found to be the most stress-tolerant genotype, with the highest Stress Tolerance Index (STI) and lowest Stress Susceptibility Index (SSI).
  • The number of grains per spike and test kernel weight were positively associated with seed yield across environments and locations.
  • The study suggests utilizing selected genotypes in hybridization to develop tolerant wheat genotypes and map underlying genes/quantitative trait loci (QTLs).

Statistics:

  • 34 landraces and elite cultivars were evaluated in the study.
  • The study was conducted over two years (2020-2021 and 2021-2022).
  • The pooled analysis of variance showed significant genotype x environment interaction.
  • Regression analysis indicated significant contribution of number of grains per spike towards stress tolerance.
  • The Stress Tolerance Index (STI) was calculated for each genotype to determine their tolerance to heat and combined heat-drought stress.
  • The Stress Susceptibility Index (SSI) was also calculated to identify stress-susceptible genotypes.

Sources:

  • "Capturing agro-morphological variability for tolerance to terminal heat and combined heat-drought stress in landraces and elite cultivar collection of wheat" published in Frontiers in Plant Science, 2023,14.
  • Frontiers in Plant Science (journal) - http://journal.frontiersin.org/journal/plant-science
  • Banda University of Agriculture and Technology (institution)
  • Science Letter (news outlet)
  • NewsRx LLC (copyright holder)
  • doi: 10.3389/fpls.2023.1136455