Euphytica

, Volume 72, Issue 3, pp 183–188

Virulence characteristics of a new race of the parasitic angiosperm, Striga gesnerioides, from southern Benin on cowpea (Vigna unguiculata)

Authors

  • J. A. Lane
    • Department of Agricultural SciencesUniversity of Bristol, AFRC Institute of Arable Crops Research, Long Ashton Research Station
  • T. H. M. Moore
    • Department of Agricultural SciencesUniversity of Bristol, AFRC Institute of Arable Crops Research, Long Ashton Research Station
  • D. V. Child
    • Department of Agricultural SciencesUniversity of Bristol, AFRC Institute of Arable Crops Research, Long Ashton Research Station
  • K. F. Cardwell
    • International Institute of Tropical Agriculture
  • B. B. Singh
    • International Institute of Tropical Agriculture
  • J. A. Bailey
    • Department of Agricultural SciencesUniversity of Bristol, AFRC Institute of Arable Crops Research, Long Ashton Research Station
Article

DOI: 10.1007/BF00034156

Cite this article as:
Lane, J.A., Moore, T.H.M., Child, D.V. et al. Euphytica (1993) 72: 183. doi:10.1007/BF00034156

Abstract

An in vitro growth system was used to determine the virulence of two samples of Striga gesnerioides from Zakpota in southern Benin. Cowpea variety B301, previously considered resistant to all races of S. gesnerioides, was susceptible to both samples of the parasite. Two other cowpea varieties, 58–57 and IT81D-994, were totally resistant. Resistance in 58–57 was associated with a hypersensitive necrosis of infected roots, whilst IT81D-994 supported production of small S. gesnerioides tubercles with stems which failed to develop. Striga gesnerioides from southern Benin is the fourth race of the parasite to be identified, and the first with virulence on variety B301. The implications for breeding cowpeas with resistance to S. gesnerioides are discussed.

Key words

Striga gesnerioidesVigna unguiculatacowpeaparasitic angiospermbreeding for resistanceparasite variationraces

Abbreviations

IITA

International Institute of Tropical Agriculture

LARS

Long Ashton Research Station

SAFGRAD

Semi-Arid Food Grain Research and Development

Copyright information

© Kluwer Academic Publishers 1994