Person: Gichuki, S.T.
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Gichuki
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S.T.
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Gichuki, S.T.
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- Genome editing for tolerance to maize lethal necrosis(KALRO, [2021]) Beyene, Y.; Dhugga, K.; Gowda, M.; Gichuki, S.T.; Mugo, S.N.; Karanja, J.; Murithi, A.; Ogugo, V.; Olsen, M.; Pixley, K.V.; Prasanna, B.M.; Suresh, L.M.; Wen, A.; Albertsen, M.; Allen, K.; Calahan, P.; Church, L.; DeLeon, A.; Farrell, J.; Federova, M.; Fengler, K.; Gaffney, J.; Greene, T.; Gutterson, N.; Habben, J.E.; Harkins, K.; Humbert, S.; Jetty, R.; Jones, T.; Jung, M.; Bailin Li; Limberger, E.; Llaca, V.; May, G.D.; Meeley, B.; Meyer, M.; Muller, M.; Owens, M.; Pitts, A.; Pundt, D.; Sanyal, A.; Schulze, J.M.; Simcox, K.; Snopek, K.; Thatcher, S.; Wilke, A.; Wu, E.; Deping Xu; Zastrow-Hayes, G.; Jones, M.; Stewart, L.R.
Publication - Use of genome editing technology to accelerate development of resistance to maize lethal necrosis disease(CIMMYT, 2021) Karanja, J.; Dhugga, K.; Mugo, S.N.; Jung, M.; Beyene, Y.; Olsen, M.; Zhengyu Wen; Gichuki, S.T.; Pixley, K.V.
Publication - Accelerated breeding to improve resistance against maize lethal necrosis (MLN)(CIMMYT, 2020) Dhugga, K.; Mugo, S.N.; Jung, M.; Beyene, Y.; Karanja, J.; Olsen, M.; Zhengyu Wen; Gichuki, S.T.; Pixley, K.V.
Publication - Resistance of Bt-maize (MON810) against the stem borers Busseola fusca (Fuller) and Chilo partellus (Swinhoe) and its yield performance in Kenya(Elsevier, 2016) Tadele Tefera; Mugo, S.N.; Mwimali, M.; Bruce, A.Y.; Tende, R.; Beyene, Y.; Gichuki, S.T.; Oikeh, S.O.; Nang’ayo, F.; Okeno, J.; Njeru, E.; Pillay, K.; Meisel, B.; Prasanna, B.M.A study was conducted to assess the performance of maize hybrids with Bt event MON810 (Bt-hybrids) against the maize stem borer Busseola fusca (Fuller) in a biosafety greenhouse (BGH) and against the spotted stem borer Chilo partellus (Swinhoe) under confined field trials (CFT) in Kenya for three seasons during 2013e2014. The study comprised 14 non-commercialized hybrids (seven pairs of near-isogenic Bt and non-Bt hybrids) and four non-Bt commercial hybrids. Each plant was artificially infested twice with 10 first instar larvae. In CFT, plants were infested with C. partellus 14 and 24 days after planting; in BGH, plants were infested with B. fusca 21 and 31 days after planting. In CFT, the seven Bt hybrids significantly differed from their non-Bt counterparts for leaf damage, number of exit holes, percent tunnel length, and grain yield. When averaged over three seasons, Bt-hybrids gave the highest grain yield (9.7 t ha1), followed by non-Bt hybrids (6.9 t ha1) and commercial checks (6 t ha1). Bt-hybrids had the least number of exit holes and percent tunnel length in all the seasons as compared to the non-Bt hybrids and commercial checks. In BGH trials, Bt-hybrids consistently suffered less leaf damage than their non-Bt near isolines. The study demonstrated that MON810 was effective in controlling B. fusca and C. partellus. Bt-maize, therefore, has great potential to reduce the risk of maize grain losses in Africa due to stem borers, and will enable the smallholder farmers to produce high-quality grain with increased yield, reduced insecticide inputs, and improved food security.
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