Euphytica (2002) 128, 375-388

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Christopher J. Botanga, Jennifer G. Kling, Dana K. Berner and Michael P. Timko (2002)
Genetic variability of Striga asiatica (L.) Kuntz based on AFLP analysis and host-parasite interaction
Euphytica 128 (3), 375-388
Abstract: AFLP analysis was used to estimate genetic variability within and among 14 populations of Striga asiatica L. Kuntze collected from different locations within the Republic of Benin. The mean within-population genetic distances ranged from 0.028 to 0.038, while the mean among-population genetic distances ranged from 0.019 to 0.088, with an assumed minimum genetic distance of 0.01 in each case. Intra- and inter-population variation was reflected by a highly significant R2 of 0.61 for the regression of geographic distance versus genetic distance. Interactions of the different Striga populations with susceptible host genotypes, 8338-1 (Zea mays) and CK60B ( Sorghum bicolor), indicated a high degree of host-specialization, with CK 60B failing to support growth of the parasite from any of the populations. The various Striga populations also exhibited different degrees of virulence on susceptible host plants. Our results support the hypothesis that different populations of this parasite may well be considered and treated as ecotypes in plant breeding programs developing resistance to S. asiatica.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Michael P. Timko, Christopher Botanga, Dana K. Berner

Research topic(s) for pests/diseases/weeds:
general biology - morphology - evolution

Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.

Striga asiatica (weed) Maize/corn (Zea mays) Benin
Striga asiatica (weed) Sorghum (crop) Benin