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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
Phenotypic approaches to drought in cassava: Review
Frontiers in Physiology, Volume 4 MAY, Article Article 93, Year 2013
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Description
Cassava is an important crop in Africa, Asia, Latin America, and the Caribbean. Cassava can be produced adequately in drought conditions making it the ideal food security crop in marginal environments. Although cassava can tolerate drought stress, it can be genetically improved to enhance productivity in such environments. Drought adaptation studies in over three decades in cassava have identified relevant mechanisms which have been explored in conventional breeding. Drought is a quantitative trait and its multigenic nature makes it very challenging to effectively manipulate and combine genes in breeding for rapid genetic gain and selection process. Cassava has a long growth cycle of 12-18 months which invariably contributes to a long breeding scheme for the crop. Modern breeding using advances in genomics and improved genotyping, is facilitating the dissection and genetic analysis of complex traits including drought tolerance, thus helping to better elucidate and understand the genetic basis of such traits. A beneficial goal of new innovative breeding strategies is to shorten the breeding cycle using minimized, efficient or fast phenotyping protocols. While high throughput genotyping have been achieved, this is rarely the case for phenotyping for drought adaptation. Some of the storage root phenotyping in cassava are often done very late in the evaluation cycle making selection process very slow. This paper highlights some modified traits suitable for early-growth phase phenotyping that may be used to reduce drought phenotyping cycle in cassava. Such modified traits can significantly complement the high throughput genotyping procedures to fast track breeding of improved drought tolerant varieties. The need for metabolite profiling, improved phenomics to take advantage of next generation sequencing technologies and high throughput phenotyping are basic steps for future direction to improve genetic gain and maximize speed for drought tolerance breeding. © 2013 Okogbenin, Setter, Ferguson, Mutegi, Ceballos, Olasanmi and Fregene.
Authors & Co-Authors
Okogbenin, Emmanuel
Nigeria, Abia State
National Root Crops Research Institute
Setter, Tim L.
United States, Ithaca
Cornell University
Ferguson, Morag Elizabeth
Kenya, Nairobi
International Institute of Tropical Agriculture
Mutegi, Rose
Kenya, Nairobi
International Institute of Tropical Agriculture
Ceballos, Hernán
Colombia, Cali
Centro Internacional de Agricultura Tropical
Olasanmi, Bunmi
Nigeria, Abia State
National Root Crops Research Institute
Fregene, Martín A.
United States, St. Louis
Donald Danforth Plant Science Center
Statistics
Citations: 152
Authors: 7
Affiliations: 5
Identifiers
Doi:
10.3389/fphys.2013.00093
e-ISSN:
1664042X
Research Areas
Cancer
Food Security
Genetics And Genomics
Study Approach
Quantitative