Wheat genetic resources enhancement by the International Maize and Wheat Improvement Center (CIMMYT)

By Rodomiro Ortiz, H. Braun, Jose Crossa, J. Crouch, G. Davenport, J. Dixon, Susanne Dreisigacker, E. Duveiller, Zhonghu He, J. Huerta and 20 more. Genetic Resources and Crop Evolution, 2008

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Strategic crossing of biomass and harvest index—source and sink—achieves genetic gains in wheat (2017, background): “…recombination of genes of minor effect when elite lines are intercrossed, as well as the introgression of new genetic diversity from landraces or wild relatives (Braun et al. 2010), typically as sources of disease resistance and grain quality traits (Ortiz et al. 2008; Sehgal et al. 2015).”
Crop Breeding for Low Input Agriculture: A Sustainable Response to Feed a Growing World Population (2011, background): “Modern breeding programs have some success at releasing maize and wheat varieties intended for marginal production areas [31,32], however for the most part modern varieties have not been widely accepted by local farmers.”
Plant tolerance to high temperature in a changing environment: scientific fundamentals and production of heat stress-tolerant crops (2013, background): “In a similar manner, a temperature increase of 3–4◦C could cause crop yields to fall by 15–35% in Africa and Asia and by 25–35% in the Middle East (Ortiz et al., 2008).”
The need to breed crop varieties suitable for organic farming, using wheat, tomato and broccoli as examples: A review (2011, background): “Nevertheless, drought tolerance, water-use efficiency and heat stress tolerance are already considered major breeding goals for wheat production in marginal regions [113].”