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Wolde, L.

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Wolde, L.

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Author: Regasa, M.W. ×

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    Chapter 7. Fast-tracking the development and dissemination of a drought-tolerant maize variety in Ethiopia in response to the risks of climate change
    (The Climate-Smart Agriculture Papers, 2019) Tadesse, B.; Azmach, G.; Keno, T.; Chibsa, T.; Beyene, A.D.; Demissie, G.; Dagne Wegary Gissa; Wolde, L.; Chere, A.T.; Regasa, M.W.
    Climate change projections suggest increased frequency of drought in many parts of sub-Saharan Africa (SSA). The replacement of old varieties of maize with new drought-tolerant (DT) varieties will be crucial to respond to the future risk of drought, as it already is today. The first group of locally developed maize hybrids in Ethiopia—BH140, BH660 and BH540—were commercialised between 1988 and 1995, but were not selected for drought tolerance. Among these, BH660 remained the most popular and widely grown maize variety in the Ethiopian maize belt between 2000 and 2010, accounting for nearly 50% of maize area under improved seed. A new DT hybrid, BH661, with better agronomic performances under optimum and random drought than BH660, was identified and released in 2011. In 2016, 9000 tonnes of certified seed—enough to plant 360,000 ha—was produced and marketed. The concerted effort of breeders and seed producers as well as governmental and non-governmental extension workers drove the development, release and rapid adoption of BH661 contributing to food and income security of more than 300,000 households by mitigating the effects of climate change in Ethiopia. The success of BH661 is a valuable and timely case study for breeders, seed companies, extension agents, regulatory bodies and policy-makers striving to develop and disseminate new DT varieties in sub-Saharan Africa.
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    Major biotic maize production stresses in Ethiopia and their management through host resistance
    (Academic Journals, 2018) Keno, T.; Azmach, G.; Dagne Wegary Gissa; Regasa, M.W.; Tadesse, B.; Wolde, L.; Deressa, T.; Abebe, B.; Chibsa, T.; Suresh, L.M.
    Biotic stresses are recently evolving very rapidly and posing significant yield losses of maize production in Ethiopia. A number of high yielding maize hybrids, initially developed as tolerant/resistant, have been taken out of production due to their susceptibility to major maize diseases. Furthermore, recent disease and insect pest epidemics have clearly shown the importance of breeding maize for biotic stresses and study the genetics of resistance to the major maize disease pathogens, insect pests and parasitic weeds. This paper gives the general perspective of the major biotic maize production stresses in Ethiopia and the interventions made locally and globally to control these stresses using host resistance. More emphasis was given to grey leaf spot (GLS), turcicum leaf blight (TLB), common leaf rust (CLR), maize streak disease (MSD), maize lethal necrosis (MLN), maize weevil, stalk borers, fall armyworm and Striga. Approaches to conducting genetic analysis and achieving durable host resistance to these stresses, where applicable, are discussed. This information will be used for breeders, private and public maize seed and grain growers who are targeting to operate in Ethiopia and Eastern Africa.
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    Meeting the challenges of global climate change and food security through innovative maize research
    (CIMMYT, 2012) Regasa, M.W.; Twumasi Afriyie, S.; Wolde, L.; Tadesse, B.; Demissie, G.; Bogale, G.; Dagne Wegary Gissa; Prasanna, B.M.
    The National Maize Research Project of Ethiopia has a well-established tradition of conducting decadal workshops on maize research, development and utilization. The first and second workshops were held in 1992 and 2001, respectively. The articles publishe
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