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A kabuli chickpea ideotype.

Tuba Eker1, Duygu Sari2, Hatice Sari2

  • 1Department of Field Crops, Faculty of Agriculture, Akdeniz University, 07070, Antalya, Turkey. ekertuba07@gmail.com.

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|February 1, 2022
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Developing a superior kabuli chickpea ideotype involved integrating disease resistance and yield-enhancing traits. Marker-assisted selection identified superior lines with high yield, large seeds, and ascochyta blight resistance for improved food security.

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Area of Science:

  • Plant breeding and genetics
  • Agronomy
  • Crop improvement

Background:

  • The crop ideotype concept aims to develop ideal plant models for enhanced yield and desirable traits.
  • Two main approaches include 'defect elimination' (e.g., disease resistance) and 'selection for yield' through hybridization.
  • Ascochyta blight causes significant yield losses in chickpea, necessitating resistant cultivars.

Purpose of the Study:

  • To introduce and develop a kabuli chickpea ideotype with high yield, extra-large seeds, and multiple pods.
  • To incorporate heat tolerance and resistance to ascochyta blight using marker-assisted selection.
  • To evaluate agro-morphological traits and molecular markers for breeding superior chickpea lines.

Main Methods:

  • Development of chickpea lines with specific ideotype traits: high plant height, imparipinnate leaves, heat tolerance, and disease resistance.
  • Evaluation of F3 and F4 lines for agro-morphological traits, including seed weight and podding characteristics.
  • Utilized molecular markers (SCY17_590 and CaETR-1) to assess ascochyta blight resistance in selected lines.

Main Results:

  • Imparipinnate-leafed and multi-podded plants exhibited the highest number of pods, seeds per plant, and overall yield.
  • Multi-podded plants significantly outperformed single- and double-podded plants in seed yield.
  • Six superior lines were selected, combining desirable traits like double/multi-podding, large seeds, heat tolerance, and ascochyta blight resistance markers.

Conclusions:

  • Ideotype breeding, combining desirable traits through crossing and marker-assisted selection, is effective for improving chickpea yield and seed size.
  • The developed chickpea ideotype, resistant to ascochyta blight and heat-tolerant, contributes to future food security.
  • The breeding strategies employed are potentially applicable to other important crop species.