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Maize screening for multiple stress tolerance and agronomic

By: Denic, M | Centro Internacional de Mejoramiento de Maiz y Trigo (CIMMYT) Kenya.
Contributor(s): Chauque, P [coaut.] | Fato, P [coaut.] | Friesen, D.K.|Palmer, A.F.E [eds.] | Haag, W [coaut.] | Langa, M [coaut.] | Mariote, D [coaut.] | Crossa, J [coaut.].
Material type: materialTypeLabelBookAnalytics: Show analyticsPublisher: Nairobi (Kenya) KARI|CIMMYT : 2002Description: p. 88-91.ISBN: 970-648-120-6.Subject(s): Agricultural economics | Agroecosystems | Crop husbandry | Maize | Mozambique | Seed production | Varieties | Yield factors | CIMMYT | KARI | Zea mays AGROVOC | Plant breeding AGROVOCDDC classification: 338.16 Summary: Maize is the principal crop and staple food in Mozambique. The most important constraints to maize production in the country are drought, soil infertility, diseases and pests. Therefore, the main attention in the breeding program is given to the selection for tolerance/resistance to maize streak virus, downy mildew, borers, drought and soil infertility. Among the agronomic traits, attention is given to quality protein maize (QPM), grain texture and earliness. In order to achieve the goal, selected populations or lines with alleles conferring the desirable traits were used. To create stress conditions for strong selection pressure on selected traits, combinations of different procedures were implemented. The breeding method of reciprocal recurrent selection was applied. The same methods were used for normal maize and QPM. Data obtained revealed that remarkable improvement for the traits under selection was achieved. The greatest progress was obtained in selection for streak resistance, flintiness and earliness. In the case of drought stress, statistical analyses revealed significant negative correlations between yield and the anthesis-silking interval, and between yield and days to silk, but a positive correlation between yield and grain weight per ear.Collection: CIMMYT Publications Collection
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Item type Current location Collection Call number Copy number Status Date due Barcode Item holds
Book CIMMYT Knowledge Center: John Woolston Library

Lic. Jose Juan Caballero Flores

 

CIMMYT Publications Collection 338.16 FRI (Browse shelf) 1 Available F630188
Total holds: 0

Maize is the principal crop and staple food in Mozambique. The most important constraints to maize production in the country are drought, soil infertility, diseases and pests. Therefore, the main attention in the breeding program is given to the selection for tolerance/resistance to maize streak virus, downy mildew, borers, drought and soil infertility. Among the agronomic traits, attention is given to quality protein maize (QPM), grain texture and earliness. In order to achieve the goal, selected populations or lines with alleles conferring the desirable traits were used. To create stress conditions for strong selection pressure on selected traits, combinations of different procedures were implemented. The breeding method of reciprocal recurrent selection was applied. The same methods were used for normal maize and QPM. Data obtained revealed that remarkable improvement for the traits under selection was achieved. The greatest progress was obtained in selection for streak resistance, flintiness and earliness. In the case of drought stress, statistical analyses revealed significant negative correlations between yield and the anthesis-silking interval, and between yield and days to silk, but a positive correlation between yield and grain weight per ear.

Genetic Resources Program

English

0409|AGRIS 0401|AL-Maize Program

Juan Carlos Mendieta

CCJL01

CIMMYT Publications Collection

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Centro Internacional de Mejoramiento de Maíz y Trigo (CIMMYT) © Copyright 2015. Carretera México-Veracruz. Km. 45, El Batán, Texcoco, México, C.P. 56237.
Si tiene cualquier pregunta, contáctenos a CIMMYT-Knowledge-Center@cgiar.org