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Identifying New Resistance to Cassava Mosaic Disease and Validating Markers for the CMD2 Locus

Author

Listed:
  • Cu Thi Le Thuy

    (International Center for Tropical Agricultural (CIAT), Hanoi 100000, Vietnam)

  • Luis Augusto Becerra Lopez-Lavalle

    (CGIAR Research Program on Roots Tubers and Bananas (RTB), International Center for Tropical Agriculture (CIAT), Cali 763537, Colombia)

  • Nguyen Anh Vu

    (National Key Laboratory for Plant Cell Biotechnology, Agricultural Genetics Institute (AGI), Hanoi 100000, Vietnam)

  • Nguyen Huu Hy

    (Hung Loc Agricultural Research Center (HLARC), Thong Nhat 810000, Vietnam)

  • Pham Thi Nhan

    (Hung Loc Agricultural Research Center (HLARC), Thong Nhat 810000, Vietnam)

  • Hernan Ceballos

    (CGIAR Research Program on Roots Tubers and Bananas (RTB), International Center for Tropical Agriculture (CIAT), Cali 763537, Colombia
    Former cassava breeders at the International Center for Tropical Agriculture (CIAT).)

  • Jonathan Newby

    (International Center for Tropical Agricultural (CIAT), Vientiane 1000, Laos)

  • Nguyen Ba Tung

    (Hung Loc Agricultural Research Center (HLARC), Thong Nhat 810000, Vietnam)

  • Nguyen Trong Hien

    (Root Crops Research and Development Center (RCRDC), Hanoi 100000, Vietnam)

  • Le Ngoc Tuan

    (National Key Laboratory for Plant Cell Biotechnology, Agricultural Genetics Institute (AGI), Hanoi 100000, Vietnam)

  • Nguyen Hung

    (National Key Laboratory for Plant Cell Biotechnology, Agricultural Genetics Institute (AGI), Hanoi 100000, Vietnam)

  • Nguyen Thi Hanh

    (National Key Laboratory for Plant Cell Biotechnology, Agricultural Genetics Institute (AGI), Hanoi 100000, Vietnam)

  • Do Thi Trang

    (National Key Laboratory for Plant Cell Biotechnology, Agricultural Genetics Institute (AGI), Hanoi 100000, Vietnam)

  • Pham Thi Thu Ha

    (Root Crops Research and Development Center (RCRDC), Hanoi 100000, Vietnam)

  • Le Huy Ham

    (National Key Laboratory for Plant Cell Biotechnology, Agricultural Genetics Institute (AGI), Hanoi 100000, Vietnam
    Faculty of Agricultural Technology, University of Engineering and Technology, Hanoi 100000, Vietnam)

  • Xuan Hoi Pham

    (National Key Laboratory for Plant Cell Biotechnology, Agricultural Genetics Institute (AGI), Hanoi 100000, Vietnam)

  • Do Thi Nhu Quynh

    (National Key Laboratory for Plant Cell Biotechnology, Agricultural Genetics Institute (AGI), Hanoi 100000, Vietnam)

  • Ismail Y. Rabbi

    (International Institute for Tropical Agriculture (IITA), Ibadan 200001, Nigeria)

  • Peter A. Kulakow

    (International Institute for Tropical Agriculture (IITA), Ibadan 200001, Nigeria)

  • Xiaofei Zhang

    (CGIAR Research Program on Roots Tubers and Bananas (RTB), International Center for Tropical Agriculture (CIAT), Cali 763537, Colombia)

Abstract

Cassava ( Manihot esculenta Crantz) is a crucial staple crop, and provides carbohydrate energy to more than half a billion people in the tropics. Cassava mosaic disease (CMD) is the most important disease of cassava in Africa. Since Sri Lanka Cassava Mosaic Virus (SLCMV) was first reported in South East Asia in 2015, establishing sustainable solutions to CMD has become a top priority for the cassava program at the International Center for Tropical Agriculture (CIAT) and its partners. In the present study, we screened two populations for CMD resistance: VNM142, 142 clones collected from farms throughout Vietnam, and CIAT102, 102 clones resistant to CMD or mites, which were introduced from CIAT. High broad-sense heritability was observed in all the trials (>0.80). From the population VNM142, eight clones showed high CMD resistance with CMD severity scores less than 2.0. Two resistant clones had the same DNA fingerprinting with the accessions CR63 (PER262 or TAI9) and KM57 (VNM8) in the genebank, respectively. To our knowledge, this is the first report of CMD resistance in the genebank at CIAT. We also used the two populations to validate the CMD markers S12_7926132 and S14_4626854. Both markers explained 51% of the population variance in the segregating population CIAT102, but only 11% in the diverse population VNM142. Thus, we concluded that the two CMD markers could not be used to select for CMD resistance in diverse populations, but could predict the CMD resistance in segregating populations when the susceptible parents do not have resistant marker alleles and the resistance of the CMD2 donors is confirmed.

Suggested Citation

  • Cu Thi Le Thuy & Luis Augusto Becerra Lopez-Lavalle & Nguyen Anh Vu & Nguyen Huu Hy & Pham Thi Nhan & Hernan Ceballos & Jonathan Newby & Nguyen Ba Tung & Nguyen Trong Hien & Le Ngoc Tuan & Nguyen Hung, 2021. "Identifying New Resistance to Cassava Mosaic Disease and Validating Markers for the CMD2 Locus," Agriculture, MDPI, vol. 11(9), pages 1-15, August.
    • Handle: RePEc:gam:jagris:v:11:y:2021:i:9:p:829-:d:625731
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    References listed on IDEAS

    as
    1. Victorino O. Floro & Ricardo A. Labarta & Luis A. Becerra López†Lavalle & Jose M. Martinez & Tatiana M. Ovalle, 2018. "Household Determinants of the Adoption of Improved Cassava Varieties using DNA Fingerprinting to Identify Varieties in Farmer Fields: A Case Study in Colombia," Journal of Agricultural Economics, Wiley Blackwell, vol. 69(2), pages 518-536, June.
    2. Bates, Douglas & Mächler, Martin & Bolker, Ben & Walker, Steve, 2015. "Fitting Linear Mixed-Effects Models Using lme4," Journal of Statistical Software, Foundation for Open Access Statistics, vol. 67(i01).
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