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The Coordinated Regional Climate Downscaling Experiment (CORDEX) initiative has made available an enormous amount of regional climate projections in different domains worldwide. This information is crucial for the development of adaptation strategies and policy‐making. A relevant open issue in this context is assessing the potential multidomain conflicts that may result in overlapping regions and developing appropriate ensemble methods trying to make the most of all available information. This work addresses this timely topic by focusing on precipitation over the Mediterranean region, a first illustrative case study that is encompassed by both the Euro‐ and Africa‐CORDEX domains. We focus on several mean, extreme, and temporal indices and use variance decomposition to assess the separate contribution of the domain and models to the climate change signal, concluding that the contribution of the domain alone is nearly negligible (below 5% in all cases). Nevertheless, for some cases, the combined model/domain effect triggers up to 40% of the total variance. Plain Language Summary: The Coordinated Regional Climate Downscaling Experiment (CORDEX) provides spatially detailed climate change projections for different regions across the world. These projections are obtained through numerical models that solve the governing equations of the atmosphere over spatial domains, which typically cover continental areas and encompass several regions. The regional climate change information generated by these models presents various sources of uncertainties. This work addresses the uncertainty related to the choice of domain, which has not been properly assessed to date, despite it can potentially affect vast regions of the world for which model simulations coming from different CORDEX domains are available. We focus on precipitation over the Mediterranean region, which is encompassed by both the EURO‐ and AFR‐CORDEX domains, and quantify the separate contribution of the model and domain alone to the total uncertainty for the climate change signals. Our results indicate that this uncertainty comes mostly determined by the choice of model, with little variability coming from the domain. This would allow for combining different model simulations corresponding to overlapping domains since conflicting signals are very unlikely to occur. These findings may ease the decision‐making process in regions for which multimodel and multidomain heterogeneous climate change information is available. Key Points: Overlaps in multidomain CORDEX regional climate change projections (e.g., in the Mediterranean) may result in conflicting messagesA variance analysis shows that domain contribution to the grand ensemble is generally small for several mean, extreme, and temporal indicesWe conclude that combining the available multidomain CORDEX simulations for a given region is an appropriate methodology [ABSTRACT FROM AUTHOR]

The gene pools for breeding cassava (Manihot esculenta Crantz) in Africa currently contain only a fraction of the existing genetic variation found in Latin America where the crop originates. Our research aimed to broaden the genetic base in Africa by introducing Latin American (LA) germ-plasm. The first set of introductions comprised sexual seeds that led to the evaluation of 20,032 seedlings in Nigeria between 1990 and 1994. A second set comprised in vitro cultures, where the dominant CMD2 gene for cassava mosaic disease (CMD) resistance was introgressed into LA germplasm through marker-assisted selection (MAS). Through MAS 156 genotypes were preselected for the gene and evaluated in Nigeria between 2004 and 2006. Initial results from the first set of introductions indicated that LA germplasm was highly susceptible to CMD, minimizing its usefulness in African cassava-breeding programs. In the second set of introductions from LA, introgression of the CMD2 gene resulted in high CMD resistance under African field conditions. Now at advanced stages in the African breeding program, 14 genotypes combining CMD resistance and high yield are being evaluated. Marker-assisted introgression of CMD resistance into LA germplasm has improved the potential value of LA germplasm for Africa and enhanced the prospect of elite LA genotypes being released as improved varieties in Africa. [ABSTRACT FROM AUTHOR]