Harnessing Crop Wild Relatives to Mitigate Biotic Stresses in Cotton Crops

Strategic Insights -

Researchers from the Chinese University of Hong Kong have made a groundbreaking discovery in the field of agriculture, highlighting the potential of crop wild relatives in improving disease resistance in cotton crops. According to their study, crop wild relatives (CWRs) can offer valuable gene pools for preserving healthy agro-ecosystems and improving disease-resistant traits. The research aims to consolidate the information on the direct uses of novel genes from CWRs in mitigating biotic stress in wheat, rice, maize, soybean, and cotton crops using breeding techniques.

Key Takeaways:

  • The global food demand is predicted to rise anywhere from 59% to 98% by 2050 due to increasing population, posing a significant threat to global food security.
  • Biotic stresses are responsible for severe yield loss in crops, with cotton experiencing a loss of 28.8%.
  • Crop wild relatives (CWRs) tend to be more resistant to various biotic stresses, offering valuable gene pools for preserving healthy agro-ecosystems and improving disease-resistant traits.
  • Modern crop cultivars have lost much of their genetic diversity due to the bottleneck effect caused by artificial selection for desirable traits such as high yield and monoculture.
  • The introgression of novel genes and alleles from CWRs into modern crop varieties is a valuable method to improve disease resistance.
  • Advanced gene-editing technologies, coupled with the accumulation of sequence data on crop wild genomes, offers an expedited pathway to convert CWRs into ideal future crops.
  • The study emphasizes the potential of CWRs in improving disease resistance in cotton crops, highlighting their value in preserving healthy agro-ecosystems.

Statistics:

  • Global food demand is predicted to rise anywhere from 59% to 98% by 2050.
  • Biotic stresses result in severe yield loss in plants, with cotton experiencing a loss of 28.8%.
  • Only 28.2% of wheat, 37.4% of rice, 31.2% of maize, 26.3% of soybean, and 28.8% of cotton yield losses are due to biotic stresses, with the remaining losses attributed to abiotic stresses.

Sources:

  • A Repertoire of Major Genes From Crop Wild Relatives for Breeding Disease-resistant Wheat, Rice, Maize, Soybean and Cotton Crops. Plant Breeding, 2025.
  • Wiley (Wiley-Blackwell - www.wiley.com/; Plant Breeding - onlinelibrary.wiley.com/journal/10.1111/(ISSN)1439-0523)