Kenya Agricultural Research Institute-RRC Kakamega Annual Report 1999

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Date
1999
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Kenya Agriculture Research Institute
Abstract
The yields of Kenya hybrids have steadily increased since their first release to the local farmers in 1963 as has been shown by the National Maize Variety Trials. At any rate, this yield increase has not been fully realised by most farmers simply because of the unnecessary heights of these hybrids that render them vulnerable to both stalk and root lodging. Maize does not have to grow all that tall to give high yields. In view of this, this programme’s interest was centred around means and ways of reducing the heights, one of which was by incorporating a dwarfing gene known as brachytic – 2 that has the ability to shorten the internode while maintaining the leaf area so that the photosynthetic structure is not interfered with. A brachytic - 2 plant is normally short, stout with a tendency to have up-right leaves and a higher frequency of prolificacy i.e. ability to have more than one ear per plant.
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