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Genetic Diversity of a Parasitic Weed, Striga hermonthica, on Sorghum and Pearl Millet in Mali

Tropical Plant Biology volume 4, pages 91–98 (2011)Cite this article

Abstract

Eleven populations of witchweed, Striga hermonthica, were collected in four regions of Mali and investigated with 12 microsatellite markers. Extensive genetic diversity was observed, with most plants heterozygous for most markers. Allelic diversity was broadly distributed across populations with little genetic differentiation and large amounts of gene flow. Nearby fields of pearl millet and sorghum were found to have indistinguishable witchweed populations. Some population structure was apparent, but did not correlate with the local environment or host genotype, suggesting that seed transportation or other human-driven variables act to differentiate central Malian S. hermonthica populations from southern Malian populations.

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Acknowledgments

We would like to thank Drs. John Burke and John Wares for comments that greatly improved this manuscript. We would also like to thank Sidi Dembele and Abdoulaye Bah for their assistance in field collection of Striga populations. This researchwas supported by grants from the Fulbright Foundation, the Guggenheim Foundation and the International Crop Research Institute for the Semi-Arid Tropics.

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Authors and Affiliations

  1. Department of Biology, University of Missouri-St. Louis, St. Louis, MO, 63121, USA

    Matt C. Estep

  2. International Crops Research Institute for the Semi-Arid Tropics, BP, 320, Bamako, Mali

    Thomas A. Van Mourik & Eva Weltzien

  3. Institute of Plant Breeding, Seed Science and Population Genetics, University of Hohenheim, Stuttgart, 70599, Germany

    Peter Muth & Heiko K. Parzies

  4. Institut d’ Economie Rurale (IER), Bamako, Mali

    Diarah Guindo

  5. Laboratory of Applied Molecular Biology, Faculty of Science and Techniques, University of Bamako, Bamako, Mali

    Ousmane A. Koita

  6. Department of Genetics, University of Georgia, Athens, GA, 30602, USA

    Jeffrey L. Bennetzen

Authors
  1. Matt C. Estep
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  2. Thomas A. Van Mourik
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  3. Peter Muth
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  4. Diarah Guindo
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  5. Heiko K. Parzies
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  6. Ousmane A. Koita
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  7. Eva Weltzien
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  8. Jeffrey L. Bennetzen
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Correspondence to Matt C. Estep.

Additional information

Communicated by Ray Ming

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Estep, M.C., Van Mourik, T.A., Muth, P. et al. Genetic Diversity of a Parasitic Weed, Striga hermonthica, on Sorghum and Pearl Millet in Mali. Tropical Plant Biol. 4, 91–98 (2011). https://doi.org/10.1007/s12042-011-9073-6

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  • DOI: https://doi.org/10.1007/s12042-011-9073-6

Keywords

  • Microsatellite markers
  • Striga hermonthica
  • Sub-Saharan Africa
  • Subsistence agriculture
  • Witchweed

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