Normal view MARC view ISBD view

Developing low-N tolerant maize varieties for mid-altitude subhumid agro-ecology of Ethiopia

By: Worku, M | Centro Internacional de Mejoramiento de Maiz y Trigo (CIMMYT) Kenya.
Contributor(s): Abera, W [coaut.] | Diallo, A [coaut.] | Friesen, D.K.|Palmer, A.F.E | Guta, A [coaut.] | Tuna, H [coaut.] | Twumasi Afriyie, S [coaut.] | Wolde, L [coaut.].
Material type: materialTypeLabelBookAnalytics: Show analyticsPublisher: Nairobi (Kenya) KARI|CIMMYT : 2002Description: p. 197-201.ISBN: 970-648-120-6.Subject(s): Agroecosystems | Ethiopia | Maize | Seed production | Subtropical climate | Varieties | CIMMYT | KARI | Soil fertility AGROVOCSummary: Soil fertility condition is among the factors intluencing maize production in mid-altitude sub-humid areas of Ethiopia Farmers are constrained by cash shortage that keeps them from using inorganic fertilizers. Different maize varieties in different sets of trials were evaluated under low-N and optimum conditions at Bako during 1999 and 2000 cropping seasons in alpha lattice design in collaboration with CIMMYT AMS project to identify varieties (hybrids and OPVs) which can give reasonable yield under both conditions. Grain yield, selection index, ears per plant, leaf senescence, anthesis-silking interval, disease reaction were considered in selecting the varieties. Separate analysis of variance for grain yield was done for each trial and it showed significant differences (P~ 0.05) among the varieties. The results showed that, when the top yielding genotype under optimum conditions in each trial was selected, the mean yield loss across the trials and years under the low-N condition was high (64.56%) and when the best materials under low-N condition were selected, most of them were less responsive under the optimum condition. But when the selection was based on the performance under both fertility conditions the mean yield loss across trials and years under low-N was 47.34%, without or with mean loss of 6.52% under the optimum condition. These varieties also significantly out yielded the local checks under both fertility conditions. This indicated the existence of genetic variation among the tested materials for the efficiency of nutrient utilization and the possibility of releasing nutrient-use-efficient commercial varieties in Ethiopia. Thus, better performing varieties under both fertility conditions were selected for further evaluation across locations.Collection: CIMMYT Staff Publications Collection
Tags from this library: No tags from this library for this title. Log in to add tags.
    average rating: 0.0 (0 votes)
Item type Current location Collection Call number Copy number Status Date due Barcode Item holds
Conference proceedings CIMMYT Knowledge Center: John Woolston Library

Lic. Jose Juan Caballero Flores

 

CIMMYT Staff Publications Collection CIS-4176 (Browse shelf) 1 Available 630217
Total holds: 0

Soil fertility condition is among the factors intluencing maize production in mid-altitude sub-humid areas of Ethiopia Farmers are constrained by cash shortage that keeps them from using inorganic fertilizers. Different maize varieties in different sets of trials were evaluated under low-N and optimum conditions at Bako during 1999 and 2000 cropping seasons in alpha lattice design in collaboration with CIMMYT AMS project to identify varieties (hybrids and OPVs) which can give reasonable yield under both conditions. Grain yield, selection index, ears per plant, leaf senescence, anthesis-silking interval, disease reaction were considered in selecting the varieties. Separate analysis of variance for grain yield was done for each trial and it showed significant differences (P~ 0.05) among the varieties. The results showed that, when the top yielding genotype under optimum conditions in each trial was selected, the mean yield loss across the trials and years under the low-N condition was high (64.56%) and when the best materials under low-N condition were selected, most of them were less responsive under the optimum condition. But when the selection was based on the performance under both fertility conditions the mean yield loss across trials and years under low-N was 47.34%, without or with mean loss of 6.52% under the optimum condition. These varieties also significantly out yielded the local checks under both fertility conditions. This indicated the existence of genetic variation among the tested materials for the efficiency of nutrient utilization and the possibility of releasing nutrient-use-efficient commercial varieties in Ethiopia. Thus, better performing varieties under both fertility conditions were selected for further evaluation across locations.

Global Maize Program

English

0409|AGRIS 0401|AL-Maize Program

Juan Carlos Mendieta

INT2402

CIMMYT Staff Publications Collection

There are no comments for this item.

Log in to your account to post a comment.
baner

International Maize and Wheat Improvement Center (CIMMYT) © Copyright 2015. Carretera México-Veracruz. Km. 45, El Batán, Texcoco, México, C.P. 56237.
Monday –Friday 9:00 am. 17:00 pm. If you have any question, please contact us at CIMMYT-Knowledge-Center@cgiar.org

Centro Internacional de Mejoramiento de Maíz y Trigo (CIMMYT) © Copyright 2015. Carretera México-Veracruz. Km. 45, El Batán, Texcoco, México, C.P. 56237.
Lunes –Viernes 9:00 am. 17:00 pm. Si tiene cualquier pregunta, contáctenos a CIMMYT-Knowledge-Center@cgiar.org