Euphytica

, Volume 102, Issue 1, pp 9–13

A molecular and embryonic study of apomixis in cassava (Manihot esculenta Crantz)

Authors

  • Nagib M.A. Nassar
    • Departamento de AgronomiaUniversidade de Brasília
  • Marco Andre Vieira
    • Departamento de AgronomiaUniversidade de Brasília
  • Clibas Vieira
    • Departamento de FitotecniaUniversidade de Vicosa
  • Dario Grattapaglia
    • Laboratório de Genética de Plantas CENARGEN-EMBRAPA –
Article

DOI: 10.1023/A:1018303109798

Cite this article as:
Nassar, N.M., Vieira, M.A., Vieira, C. et al. Euphytica (1998) 102: 9. doi:10.1023/A:1018303109798

Abstract

In cassava, apomixis fixes heterosis and avoids transmission of systemic pathogens which complicate vegetative propagation of the crop. A combination of evidence from maternal inheritance of RAPD markers and the structure of the embryonic sac in large progeny sets of two distinct genotypes have further confirmed the occurrence of apomixis in cassava. We could advance further on earlier reports of the detection of apomixis in four ways: (1) we could arrive at an estimate of the rate of facultative apomixis in the range of 2%; (2) we detected the occurrence of apomixis in a second genotype, derived from a different interspecific cross; (3) apomictic behavior was demonstrated in an F1 individual and (4) parallel embryonic evidence was generated that corroborate the potential occurrence of apomixis by apospory. The fact that apomixis was detected in an F1 interspecific hybrid hints to the possibility of directly transferring genes for apomixis from a wild relative to cultivated cassava.

embryo sacRAPDinterspecific hybrid
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Copyright information

© Kluwer Academic Publishers 1998