Browsing by Author "Dixon, G.E."
Now showing 1 - 4 of 4
- Results Per Page
- Sort Options
Item East African Work on Breeding Maize Resistant to the Tropical American Rust, Puccinia Polysora(1957) Baldwin, B.J.T.; Audrie, K.H.; Storey, H.H.; Dixon, G.E.; Hemingway, J.S.; Jameson, J.D.; Thorpe, H.C.; East African Agricultural and Forestry Research Organization: Tanganyika Agricultural Corporation: Uganda Department of Agriculture: Kenya department of AgricultureSince 1952 Puccinia polysora under has become widespread in maize in the tropical areas of East Africa, and severe attacks have been shown to reduce yield greatly. Two physiologic races have been recognized, 'EA.I' being today the prevalent race in the field and 'EA.2' being known as yet only in the Muguga glasshouses. Experimental infection trials in glasshouses at Muguga, Kenya, failed to demonstrate resistance in any African maize variety; but among maize’s imported from Central America and the Caribbean plants were found that showed the hypersensitive type of resistance. From these, lines were bred that were pure for either of two genes: Rppl. conferred high resistance to Race EA.I but none to EA.2; while Rpp2 conferred a lesser, but effective, resistance equally to both rust races. Field breeding at three stations in East Africa was successful in incorporating each of these genes separately in locally adapted maize varieties; and considerable bulks of pure-breeding resistant maize’s were expected to become available during 1957 and later years.Item Release of New Cereal Varieties—1955(1956) Thorpe, H.C.; Dixon, G.E.; Department of Agriculture, KenyaThe undermentioned cereals have been released by the Department for sowing during the 1955/56 season. In conformity with accepted procedure the varieties have been tested in trial plots on the Plant Breeding Station, Njoro (7,100 ft:), and subsequently with farmers in various parts of the territory. Fuller details of the procedure were given in an earlier article.Item Release of New Cereal Varieties-1957(1956) Dixon, G.E.; Thorpe, H.C.The undermentioned cereals have been released by the Department of Agriculture for sowing during the 1957/58 season. In conformity with established procedure the varieties have been tested in trial plots on the Plant Breeding Station and district stations, and subsequently with farmers in various parts of the country.Item Release of New Cereal Varieties-1957(1956/1957) Thorpe, H. C.; Dixon, G.E.The undermentioned cereals have been released by the Department of Agriculture for sowing during the 1957/58 season. In conformity with established procedure the varieties have been tested in trial plots on the Plant Breeding Station and district stations, and subsequently with farmers in various parts of the country.
