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Screening of Tobacco Genotypes for Tolerance/Resistance to Striga gesnerioides infestation in Zimbabwe | OMICS International| Abstract
ISSN: 2329-8863

Advances in Crop Science and Technology
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  • Research Article   
  • Adv Crop Sci Tech 2017, Vol 6(1): 340
  • DOI: 10.4172/2329-8863.1000340

Screening of Tobacco Genotypes for Tolerance/Resistance to Striga gesnerioides infestation in Zimbabwe

Koga C1*, Mabasa S2, Mazarura U2, Banwa T2 and Garwe D1
1Tobacco Research Board, , Box 1909 Harare, Zimbabwe
2University of Zimbabwe, 630 Churchill Avenue, Harare, Zimbabwe
*Corresponding Author : Koga C, Tobacco Research Board, Box 1909 Harare, Zimbabwe, Tel: +263-4-575289, Email: [email protected]

Received Date: Feb 06, 2018 / Accepted Date: Feb 13, 2018 / Published Date: Feb 19, 2018

Abstract

Witch weed (Striga gesnerioides) is a root parasitic weed of tobacco and cowpea in Sub- Saharan Africa. It is very difficult to control and host plant resistance is the most promising effective method affordable to small-scale farmers. This study was done to screen local tobacco genotypes for tolerance and resistance to Striga gesnerioides infection. Laboratory screening experiments were conducted during the 2016/17 season using fifteen local tobacco genotypes. The experiments were done using an Agar gel technique at the University of Zimbabwe, with treatments replicated four times in a Randomised Complete Block Design (RCBD). All tobacco genotypes significantly (p<0.05) stimulated the germination percentage and there were significant differences (p<0.05) in the germination distance of Striga seeds. The tobacco genotypes K RK66 and T74 had the closest Striga germination distance and the lowest germination percentages of Striga seeds, indicating their ability to produce low germination stimulants (strigolactones). This study revealed that all the tobacco genotypes were susceptible to Striga infection except the genotypes K RK66 and T74 which showed some level of tolerance and could be adopted by farmers in Striga infested areas. Additional evaluations, targeting the parental lines of the tolerant cultivars and is recommended as further studies.

Keywords: Striga gesnerioides; Tobacco; Strigolactones

Citation: Koga C, Mabasa S, Mazarura U, Banwa T, Garwe D (2018) Screening of Tobacco Genotypes for Tolerance/Resistance to Striga gesnerioides infestation in Zimbabwe . Adv Crop Sci Tech 6: 340. Doi: 10.4172/2329-8863.1000340

Copyright: © 2018 Koga C, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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