Research priorities, techniques, and accomplishments in sweet-potato breeding at IITA
1982
Hahn, S.K. (International Institute of Tropical Agriculture, Ibadan (Nigeria))
Sweet potato is an important staple-food crop in many parts of the tropics and substropics. It is grown over a wide range of environmental conditions and has a tremendous capacity to produce dry matter per unit of land and time. The major biological constraints to sweet-potato production in the tropics are weevils and viruses. The primary objective of sweet-potato breeding at IITA, therefore, has been to improve sweet-potato clones and populations resistant to weevils and viruses. The sweet-potato breeding methods and procedures are described in this paper, with particular emphasis on performance evaluation of breeding material. The IITA-improved sweet-potato cultivars with the most weevil-resistant roots and virus resistance are reported. Cultivars with improved agronomic characters, such as keeping quality, dry-matter content, and drought tolerance are also reported.
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