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Article
Assessment of management options on striga infestation and maize grain yield in Kenya
(Weed Science Society of America, 2018)
The parasitic purple witchweed [Striga hermonthica (Del.) Benth.] is a serious constraint to maize production in sub-Saharan Africa, especially in poor soils. Various Striga spp. control measures have been developed, but ...
Article
Molecular mapping and validation of SrND643: a new wheat gene for resistance to the stem rust pathogen Ug99 race group
(American Phytopathological Society (APS), 2015)
This study reports the identification of a new gene conferring resistance to the Ug99 lineage of races of Puccinia graminis f. sp. tritici in wheat (Triticum aestivum L.). Because the virulent races of stem rust pathogen ...
Article
Managing genotype x environment interaction in plant breeding programs: A selection theory approach
(Indian Society of Agricultural Statistics, 2011)
Two forms of genotype - environment interaction (GEI) are of concern to plant breeders. One consists of fixed GEI associated with predictable environmental, geographical, or management factors that can be used to delineate ...
Article
Comparison of the performance of synthetic maize varieties created based on either genetic distance or general combining ability of the parents
(Consiglio per la Ricerca e la sperimentazione in Agricoltura, Unità di Ricerca per la Maiscoltura, 2012)
Synthetics varieties are grown by farmers and used by breeders to select new inbred lines. In countries unable to market hybrids, use of synthetics leads to yield improvements over landraces. Synthetics are derived from ...
Article
Habilidad combinatoria general y especifica de lineas endogamicas de maiz tolerantes a bajo fosforo
(Universidad Nacional de Colombia, 2008)
Los cruzamientos dialelos de 12 padres contrastantes en la toma y uso de fosforo se evaluaron en dos niveles de fosforo (4 y 15 ppm) usando un diseno experimental de alpha lattice con tres repeticiones. Se uso el diseno ...
Article
Identification of drought, heat, and combined drought and heat tolerant donors in maize
(Crop Science Society of America (CSSA), 2013)
Low maize (Zea maysL.) yields and the impacts of climate change on maize production highlight the need to improve yields in eastern and southern Africa. Climate projections suggest higher temperatures within drought-prone ...
Article
Exploiting modified single crosses in maize (Zea mays L.) to facilitate hybrid use in developing countries
(Consiglio per la Ricerca e la sperimentazione in Agricoltura, Unità di Ricerca per la Maiscoltura, 2009)
A three-phase study was led by CIMMYT during 1996-99 to assess the usefulness of modified single-cross hybrids to accelerate the adoption of maize hybrids by farmers in developing countries. During Phase I, we evaluated ...
Article
Stress-adaptive changes in tropical maize (Zea mays L.) under excessive soil moisture stress
(Consiglio per la Ricerca e la sperimentazione in Agricoltura, Unità di Ricerca per la Maiscoltura, 2007)
Response of maize plants to excessive soil moisture (EM) has been studied extensively. However, systematic information on the stress-adaptive changes and cascade of events conferring the EM-tolerance is yet to ...
Article
Strategies to subdivide a target population of environments: Results from the CIMMYT-led maize hybrid testing programs in Africa
(Crop Science Society of America (CSSA), 2012)
To develop stable and high-yielding maize (Zea mays L.) hybrids for a diverse target population of environments (TPE), breeders have to decide whether greater gains result from selection across the undivided TPE or within ...
Article
Efficiency of managed-stress screening of elite maize hybrids under drought and low-N for yield under rainfed conditions in Southern Africa
(Crop Science Society of America (CSSA), 2012)
Maize (Zea mays L.) yields in southern Africa are low, due largely to drought and low-N stress. Selection of stress-tolerant genotypes by CIMMYT is conducted indirectly under managed stress conditions, although the selection ...