The release of puseletso, a Russian wheat aphid (Diuraphis noxia) resistant cultivar, in Lesotho
Material type:
TextPublication details: Addis Ababa (Ethiopia) CIMMYT : 1999ISBN: - 92-9146-058-3
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| Conference proceedings | CIMMYT Knowledge Center: John Woolston Library | CIMMYT Publications Collection | Look under series title (Browse shelf(Opens below)) | 1 | Available | 1Q629146 |
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| Look under series title Occurrence of entomopathogenic fungi and aphilinid parasitoids infecting cereal aphids in Kenya | Look under series title Inheritance of resistance to russian wheat aphid, Diuraphis noxia (Homoptera: Aphididae) in two wheat lines | Look under series title Response to seed-dressing aphicides in commercial varieties for preventing Russian wheat aphid (Diuraphis noxia) damage in Kenya | Look under series title The release of puseletso, a Russian wheat aphid (Diuraphis noxia) resistant cultivar, in Lesotho | Look under series title Stripe rust: a new threat to wheat production in South Africa | Look under series title Patchy stunting of wheat and barley in Tanzania -- preliminary results | Look under series title Occurrence and pathogenicity of Puccinia recondita f.sp. tritici in South Africa during 1997 |
In April 1992, "PUSELETSO", which means "the regaining of that which we have lost" (due to the outbreak of RW A), was released. This cultivar has a Russian wheat aphid resistance gene called DN1, and is a backcross of Tugela (Kavkaz/Jaral "S") with DN1 (SA 1684) from ARC-Small Grain Institute, South Africa. This cultivar which is also acid tolerant was donated by the Smal1 Grain Institute to the Lesotho Ministry of Agriculture in 1992, to replace susceptible and poorly adapted (outdated) cultivars. Does this mean that R W A and acidity problems are solved in Lesotho? NO! The amount of seed available is not yet sufficient for all farmers and it is known that resistance breaking biotypes of aphids can font1 when constantly exposed to resistant cultivars. Since Lesotho practices dryland farming, it will always be subjected to drought and higher temperatures during September, which will cause a rapid increase in RWA numbers. Since not all Basotho farmers have adopted Puseletso and liming, they still suffer large yield losses due to the acidity problem. Puseletso has however shown excellent adaption to Lesotho conditions and has already made a significant contribution in Lesotho.
English
0007|AGRIS 0101|AL-Wheat Program
Jose Juan Caballero
CIMMYT Publications Collection