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Intra- and Inter-Season Stability of Cassava Plant Morphological Traits Associated with Host-Plant Resistance Against Cassava Green Mite in Zambia

Received: 30 May 2023    Accepted: 19 June 2023    Published: 27 June 2023
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Abstract

Cassava genotypes that combine earliness with prolonged underground storability are most preferred for food security under subsistence farming. However, the long growth cycle of cassava coupled with the delayed harvesting by local farmers in Zambia exposes the crop to cassava green mite (CGM) attack which contributes to instability in yield performances of cassava. Various plant morphological traits have been recognized as direct or indirect defense mechanisms that enhance host plant resistance (HPR) to CGM. However, little research has been done to understand the stability of such traits despite their potential impact on the durability of HPR. With this background, field trials, involving sequential harvesting of cassava at 9, 12, and 15 months after planting (MAP) were conducted for two seasons. The objective of the study was to understand the variability of the indirect plant defense mechanisms, and how the interactions of genetic factors with crop age and season influence the expression of these vital traits. The genotype stability index was computed for each genotype for CGM population density and leaf damage, leaf retention, stay green, and apical leaf pubescence. There were highly significant differences among genotypes at different sampling dates for all the traits studied. Genotypes TMS 4 (2) 1425, L9.304/175, and L9.304/147 exhibited high intra-season and inter-season stability for low CGM-induced leaf damage. Genotypes Kapeza, Bangweulu and I60/42 exhibited a tolerance mechanism towards CGM. Two of these genotypes L9.304/175, and TMS 4 (2) 1425 also combined high intra-season and inter-season stability for increased leaf retention and apical leaf pubescence, while Kapeza and Bangweulu combined high inter-season stability for increased stay green and leaf retention. Genotypes that combined intra- and inter-season stability for both Low CGM population density and low CGM-induced leaf damage were also identified.

Published in American Journal of Agriculture and Forestry (Volume 11, Issue 3)
DOI 10.11648/j.ajaf.20231103.16
Page(s) 112-118
Creative Commons

This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.

Copyright

Copyright © The Author(s), 2024. Published by Science Publishing Group

Keywords

Mononychellus tanajoa, Host-Plant Resistance, Stability, Intra-Season, Inter-Season

References
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[5] Chalwe, A., R. Melis, P. Shanahan, and M. Chiona (2015). Inheritance of resistance to cassava green mite and other useful agronomic traits in cassava grown in Zambia. Euphytica 205: 103-119.
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[15] Mebelo, M., R. Hanna, and M. Toko. 2003. Cassava green mite biocontrol in Zambia: Progress through 2001, In R. Hanna and M. Toko (eds). Proceedings of the 3rd international regional meeting of the Africa-wide cassava green mite biocontrol project. International Institute of Tropical Agriculture, Biological control centre for Africa. Cotonou, Republic of Benin, 20-22 February 2002. P. 67-72.
[16] Miyazaki, J., W. H. Stiller, and L. J. Wilson. 2012. Novel cotton germplasm with host plant resistance to two-spotted spider mite. Field Crops Research 134: 114-121.
[17] Nkunika, P. O. Y. 1998. Potential use of entomo-pathogenic fungi for the control of termites in cassava fields, In M. O. Akoroda and J. M. Teri (eds). Proceedings of the scientific workshop of the Southern Africa Root crops Research Network (SARRNET), Lusaka, Zambia 17-19 August 1998. P. 263-268.
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[24] Raji, A., O. Ladeinde, and A. Dixon. 2008. Screening landraces for additional sources of field resistance to cassava mosaic disease and green mite for integration into the cassava improvement programme. Journal of Integrative Plant Biology 50: 311-318.
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  • APA Style

    Chalwe Able, Melis Rob, Shanahan Paul, Chiona Martin, Sakumona Mushekwa. (2023). Intra- and Inter-Season Stability of Cassava Plant Morphological Traits Associated with Host-Plant Resistance Against Cassava Green Mite in Zambia. American Journal of Agriculture and Forestry, 11(3), 112-118. https://doi.org/10.11648/j.ajaf.20231103.16

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    ACS Style

    Chalwe Able; Melis Rob; Shanahan Paul; Chiona Martin; Sakumona Mushekwa. Intra- and Inter-Season Stability of Cassava Plant Morphological Traits Associated with Host-Plant Resistance Against Cassava Green Mite in Zambia. Am. J. Agric. For. 2023, 11(3), 112-118. doi: 10.11648/j.ajaf.20231103.16

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    AMA Style

    Chalwe Able, Melis Rob, Shanahan Paul, Chiona Martin, Sakumona Mushekwa. Intra- and Inter-Season Stability of Cassava Plant Morphological Traits Associated with Host-Plant Resistance Against Cassava Green Mite in Zambia. Am J Agric For. 2023;11(3):112-118. doi: 10.11648/j.ajaf.20231103.16

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  • @article{10.11648/j.ajaf.20231103.16,
      author = {Chalwe Able and Melis Rob and Shanahan Paul and Chiona Martin and Sakumona Mushekwa},
      title = {Intra- and Inter-Season Stability of Cassava Plant Morphological Traits Associated with Host-Plant Resistance Against Cassava Green Mite in Zambia},
      journal = {American Journal of Agriculture and Forestry},
      volume = {11},
      number = {3},
      pages = {112-118},
      doi = {10.11648/j.ajaf.20231103.16},
      url = {https://doi.org/10.11648/j.ajaf.20231103.16},
      eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajaf.20231103.16},
      abstract = {Cassava genotypes that combine earliness with prolonged underground storability are most preferred for food security under subsistence farming. However, the long growth cycle of cassava coupled with the delayed harvesting by local farmers in Zambia exposes the crop to cassava green mite (CGM) attack which contributes to instability in yield performances of cassava. Various plant morphological traits have been recognized as direct or indirect defense mechanisms that enhance host plant resistance (HPR) to CGM. However, little research has been done to understand the stability of such traits despite their potential impact on the durability of HPR. With this background, field trials, involving sequential harvesting of cassava at 9, 12, and 15 months after planting (MAP) were conducted for two seasons. The objective of the study was to understand the variability of the indirect plant defense mechanisms, and how the interactions of genetic factors with crop age and season influence the expression of these vital traits. The genotype stability index was computed for each genotype for CGM population density and leaf damage, leaf retention, stay green, and apical leaf pubescence. There were highly significant differences among genotypes at different sampling dates for all the traits studied. Genotypes TMS 4 (2) 1425, L9.304/175, and L9.304/147 exhibited high intra-season and inter-season stability for low CGM-induced leaf damage. Genotypes Kapeza, Bangweulu and I60/42 exhibited a tolerance mechanism towards CGM. Two of these genotypes L9.304/175, and TMS 4 (2) 1425 also combined high intra-season and inter-season stability for increased leaf retention and apical leaf pubescence, while Kapeza and Bangweulu combined high inter-season stability for increased stay green and leaf retention. Genotypes that combined intra- and inter-season stability for both Low CGM population density and low CGM-induced leaf damage were also identified.},
     year = {2023}
    }
    

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  • TY  - JOUR
    T1  - Intra- and Inter-Season Stability of Cassava Plant Morphological Traits Associated with Host-Plant Resistance Against Cassava Green Mite in Zambia
    AU  - Chalwe Able
    AU  - Melis Rob
    AU  - Shanahan Paul
    AU  - Chiona Martin
    AU  - Sakumona Mushekwa
    Y1  - 2023/06/27
    PY  - 2023
    N1  - https://doi.org/10.11648/j.ajaf.20231103.16
    DO  - 10.11648/j.ajaf.20231103.16
    T2  - American Journal of Agriculture and Forestry
    JF  - American Journal of Agriculture and Forestry
    JO  - American Journal of Agriculture and Forestry
    SP  - 112
    EP  - 118
    PB  - Science Publishing Group
    SN  - 2330-8591
    UR  - https://doi.org/10.11648/j.ajaf.20231103.16
    AB  - Cassava genotypes that combine earliness with prolonged underground storability are most preferred for food security under subsistence farming. However, the long growth cycle of cassava coupled with the delayed harvesting by local farmers in Zambia exposes the crop to cassava green mite (CGM) attack which contributes to instability in yield performances of cassava. Various plant morphological traits have been recognized as direct or indirect defense mechanisms that enhance host plant resistance (HPR) to CGM. However, little research has been done to understand the stability of such traits despite their potential impact on the durability of HPR. With this background, field trials, involving sequential harvesting of cassava at 9, 12, and 15 months after planting (MAP) were conducted for two seasons. The objective of the study was to understand the variability of the indirect plant defense mechanisms, and how the interactions of genetic factors with crop age and season influence the expression of these vital traits. The genotype stability index was computed for each genotype for CGM population density and leaf damage, leaf retention, stay green, and apical leaf pubescence. There were highly significant differences among genotypes at different sampling dates for all the traits studied. Genotypes TMS 4 (2) 1425, L9.304/175, and L9.304/147 exhibited high intra-season and inter-season stability for low CGM-induced leaf damage. Genotypes Kapeza, Bangweulu and I60/42 exhibited a tolerance mechanism towards CGM. Two of these genotypes L9.304/175, and TMS 4 (2) 1425 also combined high intra-season and inter-season stability for increased leaf retention and apical leaf pubescence, while Kapeza and Bangweulu combined high inter-season stability for increased stay green and leaf retention. Genotypes that combined intra- and inter-season stability for both Low CGM population density and low CGM-induced leaf damage were also identified.
    VL  - 11
    IS  - 3
    ER  - 

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Author Information
  • Department of Agriculture Science, School of Mathematical and Natural Sciences, Mukuba University, Kitwe, Zambia

  • African Centre for Crop Improvement, University of Kwazulu-Natal, Pietermaritzburg, South Africa

  • African Centre for Crop Improvement, University of Kwazulu-Natal, Pietermaritzburg, South Africa

  • Zambia Agriculture Research Institute, Mansa Research Station, Mansa, Zambia

  • Department of Agriculture Science, School of Mathematical and Natural Sciences, Mukuba University, Kitwe, Zambia

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