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A New Breeding Strategy towards Introgression and Characterization of Stay-Green QTL for Drought Tolerance in Sorghum

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  • Nasrein Mohamed Kamal

    (Arid Land Research Center, Tottori University, 1390 Hamasaka, Tottori 680-0001, Japan
    Biotechnology and Biosafety Research Centre, Agricultural Research Corporation, P.O. Box 30, Shambat, Khartoum North, Sudan)

  • Yasir Serag Alnor Gorafi

    (Arid Land Research Center, Tottori University, 1390 Hamasaka, Tottori 680-0001, Japan
    Agricultural Research Corporation, P.O. Box 126, Wad Medani, Sudan)

  • Hanan Abdeltwab

    (Agricultural Research Corporation, P.O. Box 126, Wad Medani, Sudan)

  • Ishtiag Abdalla

    (Agricultural Research Corporation, P.O. Box 126, Wad Medani, Sudan
    Agribusiness and Consumer Sciences Department, Faculty of Agriculture and Food Sciences, King Faisal University, P.O. Box 400, Al-Ahssa 31982, Saudi Arabia)

  • Hisashi Tsujimoto

    (Arid Land Research Center, Tottori University, 1390 Hamasaka, Tottori 680-0001, Japan)

  • Abdelbagi Mukhtar Ali Ghanim

    (Arid Land Research Center, Tottori University, 1390 Hamasaka, Tottori 680-0001, Japan
    Plant Breeding and Genetics Laboratory, FAO/IAEA Joint Division, International Atomic Energy Agency (IAEA), 2444 Seibersdorf, Austria)

Abstract

Several marker-assisted selection (MAS) or backcrossing (MAB) approaches exist for polygenic trait improvement. However, the implementation of MAB remains a challenge in many breeding programs, especially in the public sector. In MAB introgression programs, which usually do not include phenotypic selection, undesired donor traits may unexpectedly turn up regardless of how expensive and theoretically powerful a backcross scheme may be. Therefore, combining genotyping and phenotyping during selection will improve understanding of QTL interactions with the environment, especially for minor alleles that maximize the phenotypic expression of the traits. Here, we describe the introgression of stay-green QTL ( Stg 1– Stg 4) from B35 into two sorghum backgrounds through an MAB that combines genotypic and phenotypic (C-MAB) selection during early backcross cycles. The background selection step is excluded. Since it is necessary to decrease further the cost associated with molecular marker assays, the costs of C-MAB were estimated. Lines with stay-green trait and good performance were identified at an early backcross generation, backcross two (BC 2 ). Developed BC 2 F 4 lines were evaluated under irrigated and drought as well as three rainfed environments varied in drought timing and severity. Under drought conditions, the mean grain yield of the most C-MAB-introgression lines was consistently higher than that of the recurrent parents. This study is one of the real applications of the successful use of C-MAB for the development of drought-tolerant sorghum lines for drought-prone areas.

Suggested Citation

  • Nasrein Mohamed Kamal & Yasir Serag Alnor Gorafi & Hanan Abdeltwab & Ishtiag Abdalla & Hisashi Tsujimoto & Abdelbagi Mukhtar Ali Ghanim, 2021. "A New Breeding Strategy towards Introgression and Characterization of Stay-Green QTL for Drought Tolerance in Sorghum," Agriculture, MDPI, vol. 11(7), pages 1-19, June.
  • Handle: RePEc:gam:jagris:v:11:y:2021:i:7:p:598-:d:583641
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    References listed on IDEAS

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    1. Rosenow, D. T. & Quisenberry, J. E. & Wendt, C. W. & Clark, L. E., 1983. "Drought tolerant sorghum and cotton germplasm," Agricultural Water Management, Elsevier, vol. 7(1-3), pages 207-222, September.
    2. Brennan, John P. & Rehman, Ata & Raman, Harsh & Milgate, Andrew W. & Pleming, Denise & Martin, Peter J., 2005. "An economic assessment of the value of molecular markers in plant breeding programs," 2005 Conference (49th), February 9-11, 2005, Coff's Harbour, Australia 137929, Australian Agricultural and Resource Economics Society.
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    Cited by:

    1. Andekelile Mwamahonje & John Saviour Yaw Eleblu & Kwadwo Ofori & Tileye Feyissa & Santosh Deshpande & Ana Luísa Garcia-Oliveira & Rajaguru Bohar & Milcah Kigoni & Pangirayi Tongoona, 2021. "Introgression of QTLs for Drought Tolerance into Farmers’ Preferred Sorghum Varieties," Agriculture, MDPI, vol. 11(9), pages 1-14, September.

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    Keywords

    sorghum; stay-green; QTL; C-MAB; drought;
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