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Maize seed selection by East African smallholder farmers and resistance to Maize streak virus

Maize seed selection by East African smallholder farmers and resistance to Maize streak virus

Gibson, R.W., Lyimo, N.G., Temu, A.E.M., Stathers, T.E., Page, W.W., Nsemwa, L.T.H., Acola, G. and Lamboll, R.I. (2005) Maize seed selection by East African smallholder farmers and resistance to Maize streak virus. Annals of Applied Biology, 147 (2). pp. 153-159. ISSN 0003-4746 (Print), 1744-7348 (Online) (doi:10.1111/j.1744-7348.2005.00021.x)

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Abstract

Interviews identified that most small-scale maize farmers in central Uganda and in the Southern Highlands of Tanzania plant home-saved seed of landraces or seed derived from various open-pollinated and hybrid varieties. Some farmers
also bought a portion of their seed, either certified seed, locally traded seed or even maize sold for consumption. Selection for home-saved seed was generally among harvested cobs. Big cobs with many, regularly arranged, large, white,
flint kernels were preferred. A maize cob may bear several hundred seeds, so a farmer needs to save <1% of cobs for seed. A form of resistance in which plants show only moderate symptoms and suffer only a small reduction in yield when infected has been incorporated in some released varieties. Because not all plants in most crops are infected and because plants uninfected with Maize streak virus (MSV) tend to produce bigger cobs than infected resistant plants, the few cobs selected by a farmer for seed may all be from the uninfected ‘escapes’, with no preferential selection of resistant types. On-station simulation of the farmers’ selection process in a crop of the MSV-resistant maize variety, Longe 1, confirmed this. An alternative very strong form of MSV resistance was
identified.

Item Type: Article
Additional Information: [1] Published on behalf of The Association of Applied Biologists.
Uncontrolled Keywords: Africa, farmer selection, host plant disease resistance, landraces
Subjects: S Agriculture > SB Plant culture
Faculty / Department / Research Group: Faculty of Engineering & Science > Natural Resources Institute
Related URLs:
Last Modified: 05 Dec 2013 17:50
Selected for GREAT 2016: None
Selected for GREAT 2017: None
Selected for GREAT 2018: None
URI: http://gala.gre.ac.uk/id/eprint/10388

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