Response of transgenic Bt cowpea lines and their hybrids under field conditions
Open accessAbstract
Transgenic cowpeas are those genetically engineered with Cry1Ab gene for protection against the lepidopteran pest Maruca vitrata that could inflict upto 80% yield loss in severe infestation. Two transgenic events TCL-709 and TCL-711 were crossed to three non-transgenic lines IT97K-499-35, IT93K-693-2 and IT86D-1010 to generate six set of F1 hybrids. The study was designed and conducted to evaluate the performance of transgenic cowpeas and hybrids derived from them under natural field conditions. The transgenics, non-transgenics and the hybrids were planted with intra and inter-row spacing of 30 and 75 cm respectively in a completely Randomized Block Design during the 2012 cowpea growing season at Confined Field Trial site of Institute for Agricultural Research of Ahmadu Bello University Samaru-Zaria. The plot sizes consisted of 2 rows of 5 m long. The trial was kept weed-free by constant manual weeding. The various generations of IT97K-499-35 x TCL-709 were infested six times with first instar Maruca larvae at four day interval at flower initiation stage while the remaining crosses were exposed to natural infestation of Maruca. The data were recoreded on various characters and the results revealed that the cowpea lines containing the cry1Ab gene produced enough toxin to kill and inhibit the feeding of Maruca on cowpea plants. The result on infestation of Maruca larvae scored as number of damaged pods per plant gave a clear proof of the achievement of the goal of the genetic transformation of cowpea lines with Cry1Ab gene. As the Cry1Ab gene conferred a high degree of resistance to cowpea pod borer, the transgenic cowpea lines should be used as a precious insect-resistant line to be employed in traditional breeding programs to develop Maruca resistant cowpea varieties. Key words: Bacillus thuriengiensis, confined field trial, Cry1Ab gene, transgenic cowpea, Maruca vitrata.
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Cowpea contains Cry1Ab to protect the plant from damage by Maruca testulalis.
“Another example is that of cowpea (Vigna unguiculata ssp.unguiculata) that contains Cry1Ab to protect the plant from damage by Maruca testulalis (Lepidoptera: Crambidae) (Ba et al., 2018;Huesing et al., 2011;Mohammed et al., 2014).”
From Genetically engineered crops help support conservation biological control (2019) · cites this paper as Mohammed et al., 2014
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References 14 · Cited by 17
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- Barton K (1989). Development of insect resistance cotton. AgBiotech 89-Proceedings of a conference held in Arlington-Virginia USA 28-30: pp. 168-171.
- Ishiyaku MF (2010). Domestication of Agricultural Biotechnology in Nigeria: Challenges and Opportunities: A paper presentation to the one day sensitization workshop organized by the RCN, IAR of the Ahmadu Bello University, Zaria, p.
- Mohammed BS, Ishiyaku MF, Katung MD, Abdullahi US (2012). Towards Establishing a Suitable Approach to Field Hybridization of Cowpea. Edited Proceedings of the 36th Annual Conference of Genetics Society of Nigeria, held at University of Calabar, 15-18th October, 2012.
- Editors: Uyoh, E.A., Iwo, G.A., Okon, B., Ittah, M.A., Ibom, L.A., Etta, H. And Udensi, O.} pp. 100-105.
- NGICA (2002). Report of workshop on the genetic transformation of Cowpea held in Capri, Italy, October 31 -November 2. Accessed 05/05/2011 on http://www.entm.purdue.edu/NGICA/reports /italy_proceedings.pdf
- Singh BB (2002). Breeding cowpea varieties for resistance to Striga gesnerioides and Alectra vogelii. In C.A. Fatokun et al. (ed.) Challenges and opportunities for enhancing sustainable cowpea production. IITA, Ibadan, Nigeria, pp. 154-166. http://old.iita.org/cms/articlefiles/737- Cowpea%20proceedings%202002.pdf
- Singh BB, Ehlers JD, Sharma B, Filho FRF (2002). Recent progress in cowpea breeding. In; Fatokun, C.A., Tarawali, S.A., Singh,B.B., Kormawa, P.M. and Tamò, M.(eds). Challenges and opportunities for enhancing sustainable cowpea production. Proceedings of the World Cowpea Conference III held at the IITA, Ibadan, Nigeria, p. 396.
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- Authors
- Mohammed, Ishiyaku, Abdullahi, & Katung
- Affiliations
- Ahmadu Bello University (NG)
- Venue
- Journal of Plant Breeding and Crop Science
- Publisher
- Academic Journals
- Published
- 2014-08-21
- Volume
- 6
- Issue
- 8
- Pages
- 91-96
- ISSN
- 2006-9758 (ISSN-L)
- OpenAlex
- W2164340692
- Cited by
- 17
- References
- 14
- Citations by year
- 2026: 2 · 2025: 1 · 2023: 1 · 2022: 2 · 2021: 3 · 2020: 2 · 2019: 2 · 2018: 2 · 2017: 2
- FWCI
- 0.78
- Type
- journal article
- Language
- en
- Open access
- hybrid
- doi.org
- Licence
- cc-by
- Locations
- Journal of Plant Breeding and Crop Science (publishedVersion, cc-by)
- Funders
- Ahmadu Bello University
- Topics
- Life Sciences › Agricultural and Biological Sciences › Plant Science › Genetically Modified Organisms Research
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Insect Resistance and Genetics
- Life Sciences › Agricultural and Biological Sciences › Plant Science › Agricultural pest management studies
- Keywords
- cowpea, cry1Ab gene, Bacillus thuringiensis, Maruca vitrata, cowpea pod borer, insect resistance, F1 hybrids, field trials, pod damage
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