The effectiveness of extension strategies for increasing the adoption of biofortified crops: the case of quality protein maize in East Africa

Gunaratna, Nilupa S.; Fisher, Monica; Kebebe, E.G.; Mmbando, Frank; Friesen, Dennis

doi:10.1007/s12571-016-0621-7

Cited by 34 publications

(57 citation statements)

References 36 publications

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“…Bio-fortified crops bred for improved nutritional quality can alleviate nutritional deficiencies if they are produced and consumed in sufficient quantities [35]. Several studies in controlled settings have indicated the positive impact of QPM on the nutritional status of human consumption and animal feeds [12,34,[36][37][38][39][40][41].…”

Section: Nutritional Quality and Impact Of Qpmmentioning

confidence: 99%

Breeding for Quality Protein Maize (QPM) Varieties: A Review

et al. 2017

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Abstract:The nutritional evaluation of quality protein maize (QPM) in feeding trials has proved its nutritional superiority over non-QPM varieties for human and livestock consumption. The present paper reviews some of the most recent achievements in development of QPM varieties using both conventional and molecular breeding under stressed and non-stressed environments. It is evident that numerous QPM varieties have been developed and released around the world over the past few decades. While the review points out some gaps in information or research efforts, challenges associated with adoption QPM varieties are highlighted and suggestions to overcome them are presented. The adoption of released varieties and challenges facing QPM production at the farmer level are also mentioned. Several breeding methods have been conventionally used to develop QPM varieties in stressed (drought, low soil nitrogen, resistance to grey leaf spot, Turcicum leaf blight, ear rot, and Striga) and non-stressed environments. At least three genetic loci have been found to be implicated in controlling the levels of a protein synthesis factor correlated with lysine. They have been mapped on chromosomes 2, 4, and 7. While the use of molecular approaches will improve the efficiency and speed of variety development, the cost implications might limit the use of these technologies in the developing world. More emphasis should be given to breeding QPM for tolerance to environmental stresses, such as low soil pH, heat, and combined heat and drought stress. The post-harvest attack of QPM grains should also be considered. The adoption of QPM genotypes by farmers has been found to be limited mainly due to the minimal collaboration between maize breeders, farmers, agricultural extension workers, and other relevant stakeholders, as well as the need for isolating QPM varieties from normal maize. Therefore, there is need to use participatory plant breeding (PPB) and/or participatory variety selection (PVS) to enhance and improve the adoption of QPM varieties.

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Section: Nutritional Quality and Impact Of Qpmmentioning

confidence: 99%

Breeding for Quality Protein Maize (QPM) Varieties: A Review

et al. 2017

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“…Recycling of seed from one season to another is still a popular practice in Sub-Saharan Africa due to the high seed cost and limited access to quality seed (Sserunkuuma 2003;De Groote et al 2010). Farmers have shown preference for the variety Longe5 because of its quality protein nature, easy access to seed, and high adaptability (De Groote et al 2010).…”

Section: Introductionmentioning

confidence: 99%

“…Farmers have shown preference for the variety Longe5 because of its quality protein nature, easy access to seed, and high adaptability (De Groote et al 2010). For the same reasons, a number of projects have been implemented to promote Longe5, especially in schools and resettlement schemes in northern Uganda where they are rehabilitating people formerly affected by the war.…”

Section: Introductionmentioning

confidence: 99%

Response of maize population “Longe5” to two cycles of modified S1 recurrent selection for resistance to maize weevil

2015

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The maize weevil (Sitophilus zeamais Mostch.) is one of the most damaging storage pests causing significant reductions in grain weight and quality in tropical and subtropical regions. The current study determined the effectiveness of two cycles of modified S 1 recurrent selection towards the improvement of weevil resistance in the maize variety ''Longe5''. Grain yield and resistance to Turcicum leaf blight, grey leaf spot and rust diseases, which occurred naturally at the time of experimentation, were also evaluated to enhance the overall worth of the maize variety. Selections were made by identifying and self-pollinating the foliar disease resistant and vigorous plants, with potentially big well-placed ears from the base population of the Longe5 (the original cycle i.e., C 0 ), grown at the National Crops Resources Research Institute, Namulonge, in Uganda. Over 540 selfed ears were obtained from the C 0 and were screened for maize weevil resistance under controlled conditions in the laboratory, after which 162 weevil resistant genotypes were selected and recombined in an isolated field to generate the C 1 . The second cycle (C 2 ) was generated from the C 1 in a similar procedure, by recombining 190 weevil resistant genotypes. The C 0 , C 1 , and C 2 were evaluated for grain yield and reaction to foliar diseases at three locations, and the ensuing seed was screened for maize weevil resistance in the laboratory. Significant gains were obtained for maize weevil resistance. There was a reduction in grain weight loss due to maize weevil damage of 65 % in C 2 and 15 % in C 1 . There was a 33 % reduction in the number of weevil progenies emerging in C 2 and 19 % in C 1 grain. Similar positive trends were realized for grain yield and resistance to foliar diseases in C 1 and C 2 compared to C 0 . The results indicate that the modified S 1 recurrent selection was effective in improving Longe5 for maize weevil resistance.

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“…To have a look into the protein biofortifi cation efforts and effects in maize reader may go through these articles, Hugo et al 2010 ;Akalu et al 2010 ;Gunaratna et al 2010 .…”

Section: Cereals: Iron Zinc and Vitamin Amentioning

confidence: 99%

Sustainable Agriculture Reviews

2015

Sustainable Agriculture Reviews

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The effectiveness of extension strategies for increasing the adoption of biofortified crops: the case of quality protein maize in East Africa

Cited by 34 publications

References 36 publications

Breeding for Quality Protein Maize (QPM) Varieties: A Review

Breeding for Quality Protein Maize (QPM) Varieties: A Review

Response of maize population “Longe5” to two cycles of modified S1 recurrent selection for resistance to maize weevil

Sustainable Agriculture Reviews

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