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Related Experiment Video

Updated: Dec 20, 2025

Author Spotlight: Streamlining Rice Breeding with CRISPR/Cas for Obtaining Optimal Phenotypic and Agronomic Traits
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Marker Assisted Forward Breeding to Combine Multiple Biotic-Abiotic Stress Resistance/Tolerance in Rice.

Shilpi Dixit1, Uma Maheshwar Singh1,2, Arun Kumar Singh1

  • 1International Rice Research Institute (IRRI), South-Asia Hub, ICRISAT, Hyderabad, India.

Rice (New York, N.Y.)
|May 31, 2020
PubMed
Summary

Climate-resilient rice varieties were developed using marker-assisted selection (MAS) to combine multiple disease and pest resistance genes with drought tolerance. These new rice lines offer high yields and good grain quality under various stress conditions.

Keywords:
AbioticBioticDiseaseDroughtForward breedingGenesMarker assisted breedingPestPyramidingResistance

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Area of Science:

  • Plant breeding and genetics
  • Agricultural science
  • Climate change adaptation

Background:

  • Increasing biotic and abiotic stresses due to climate change threaten rice production.
  • Development of climate-resilient rice is crucial for food security.

Purpose of the Study:

  • To develop high-yielding, climate-resilient rice using marker-assisted forward breeding (MAFB).
  • To introgress genes for resistance to blast, bacterial leaf blight (BLB), brown planthopper (BPH), gall midge (GM), and quantitative trait loci (QTLs) for drought tolerance.

Main Methods:

  • Marker-assisted selection (MAS) breeding approach.
  • Introgression of multiple resistance genes (Pi9, Xa4, xa5, Xa21, Bph3, Bph17, Gm4, Gm8) and drought tolerance QTLs (qDTY1.1, qDTY3.1).
  • Evaluation of developed introgression lines (ILs) in background of Swarna.

Main Results:

  • Seven introgression lines (ILs) with 7-10 genes/QTLs were developed.
  • ILs exhibited superior agronomic performance and preferred grain quality (23-26% amylose content).
  • Three ILs (IL1, IL6, IL7) showed resistance/tolerance to multiple stresses in field and greenhouse conditions, with high yields under stress and no yield penalty under non-stress conditions.

Conclusions:

  • Marker-assisted selection (MAS) successfully combined tolerance to multiple biotic and abiotic stresses in rice.
  • Developed ILs demonstrated superiority over the recurrent parent Swarna+drought, offering yield advantages under drought and maintaining grain quality.