Efficacy of drought-tolerant and insect-protected transgenic TELA® maize traits in Nigeria.

Autor: Oyekunle M; Institute for Agricultural Research (IAR) Samaru, Zaria, Nigeria. moyekunle@abu.edu.ng., Adamu RS; Institute for Agricultural Research (IAR) Samaru, Zaria, Nigeria., Ndou E; Bayer Crop Science, South Africa Bayer (Pty) Ltd Place, 27 Wrench Rd, Petit, Isando, 1600, South Africa., Beyene Y; International Maize and Wheat Improvement Center (CIMMYT), P.O. Box 1041-00621, Nairobi, Kenya., Abdulmalik MM; Institute for Agricultural Research (IAR) Samaru, Zaria, Nigeria., Oikeh SO; African Agricultural Technology Foundation (AATF), ILRI Campus, P.O. Box 30709-00100, Nairobi, Kenya.
Jazyk: angličtina
Zdroj: Transgenic research [Transgenic Res] 2023 Jun; Vol. 32 (3), pp. 169-178. Date of Electronic Publication: 2023 Apr 12.
DOI: 10.1007/s11248-023-00345-x
Abstrakt: Assessment of efficacy of drought tolerance (DT) and insect protection (Bt) genes in maize genotypes is invaluable for commercialization and production of transgenic maize in Nigeria. Seven maize hybrids, known as TELA® maize, with stacked events of Bt insect protection (MON89034) and drought tolerance (MON87460; DroughtGard®) and their respective non-GM versions (isohybrids) developed through the TELA Maize Project were evaluated in confined field trial site at Zaria in 2020 and 2021. The objective was to assess the efficacy of stacked DT and Bt genes to seek deregulation and commercialization of both traits in Nigeria. Significant (P < 0.05-0.01) differences were observed among genotypes (G), environments (E) and genotype × environment interaction (GEI) for grain yield and most other traits under stem borer (moth species) and fall armyworm infested, drought stress, and optimum-moisture conditions, except E and GEI under drought. TELA® GM hybrids with Bt MON89034 had 19% higher yield than their non-GM isogenic versions, and 40% higher yield than the commercial checks under the target pests infestation. The foliar damage score of all the TELA® GM genotypes was ≤ 2 relative to their non-GM isogenic versions which scored ≥ 4, indicating the effectiveness of the Bt MON89034 gene in conferring resistance against stem borer and fall armyworm. Under moderate drought, pairwise comparison showed TELA® GM Hybrid 1-1 and Hybrid 2-1 had 12.4-20.4% higher (P < 0.01) yield than their isogenic versions. Under optimum-moisture condition with pests controlled, the TELA® GM and their isogenic hybrids were similar, but both had 32% higher yield than the commercial checks. Adoption of TELA® GM technology by farmers as adaptation strategy to cope with climate change, will ensure sustainability of maize production and productivity in Nigeria.
(© 2023. The Author(s), under exclusive licence to Springer Nature Switzerland AG.)
Databáze: MEDLINE
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