, Volume 155, Issue 1–2, pp 215–224 | Cite as

Resistance profile of improved cassava germplasm to cassava mosaic disease in Nigeria

  • C. N. EgesiEmail author
  • F. O. Ogbe
  • M. Akoroda
  • P. Ilona
  • A. Dixon


Cassava mosaic disease (CMD) caused by a group of begomoviruses and transmitted by whitefly vector is a serious disease in all the cassava-growing areas of Africa. Field evaluation with replication was conducted in 2003 and 2004 in three agroecologies in Nigeria to study the response of 40 cassava genotypes to CMD and to investigate genotype × environment (GE) interactions on their reactions to CMD, using the rank-sum classification and site regression analysis model. The 40 genotypes were separated into resistant (n = 17), moderately resistant (n = 6), moderately susceptible (n = 2) and susceptible (n = 15) groups. Environments, genotypes and GE interactions were all highly significant (P < 0.0001) for the virus disease contributing 9.5%, 71.36% and 19.14%, respectively to total variation. More than 40% of the genotypes were identified as resistant to the disease. Genotypes TMS 98/0581, TMS 99/3073, TMS 97/4763, TMS M98/0040, TMS 98/0505, TMS 97/0211, TMS 97/4769, TMS 99/2123, TMS M98/0068 and TMS 97/0162 were shown to have high resistance to CMD. The study also identified Umudike, in south-east Nigeria, as having high disease severity and the most appropriate site for CMD resistance screening of genotypes. Most of the genotypes exhibited stable resistance to CMD. The implication that the availability of these resistant genotypes as identified in this study could be a source of CMD resistance for further breeding is discussed.


AUDPC Cassava mosaic disease Genotype × environment interaction Germplasm Resistance Manihot esculenta 



The CMD project (2003–2004) was co-sponsored by the Federal Government of Nigeria, the State Governments of the south–south and southeast geopolitical zones, Ondo State government, the Niger Delta Development Commission (NDDC), Nigerian National Petroleum Corporation (NNPC), Shell Petroleum Development Company (SPDC), and the United States Agency for International Development (USAID), we acknowledge their support and thank them.


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Copyright information

© Springer Science+Business Media B.V. 2006

Authors and Affiliations

  • C. N. Egesi
    • 1
    Email author
  • F. O. Ogbe
    • 1
    • 2
  • M. Akoroda
    • 2
  • P. Ilona
    • 2
  • A. Dixon
    • 2
  1. 1.Root Crops DivisionNational Root Crops Research InstituteUmuahiaNigeria
  2. 2.International Institute of Tropical AgricultureIbadanNigeria

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