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Genotyping By Sequencing And Genome–Environment Associations In Wild Common Bean Predict Widespread Divergent Adaptation To Drought, Andrés J. Cortés, Matthew W. Blair
Genotyping By Sequencing And Genome–Environment Associations In Wild Common Bean Predict Widespread Divergent Adaptation To Drought, Andrés J. Cortés, Matthew W. Blair
Agricultural and Environmental Sciences Faculty Research
Drought will reduce global crop production by >10% in 2050 substantially worsening global malnutrition. Breeding for resistance to drought will require accessing crop genetic diversity found in the wild accessions from the driest high stress ecosystems. Genome–environment associations (GEA) in crop wild relatives reveal natural adaptation, and therefore can be used to identify adaptive variation. We explored this approach in the food crop Phaseolus vulgaris L., characterizing 86 geo-referenced wild accessions using genotyping by sequencing (GBS) to discover single nucleotide polymorphisms (SNPs). The wild beans represented Mesoamerica, Guatemala, Colombia, Ecuador/Northern Peru and Andean groupings. We found high polymorphism with a …
Effects Of Precipitation Changes On Switchgrass Photosynthesis, Growth, And Biomass: A Mesocosm Experiment, Dafeng Hui, Chih-Li Yu, Qi Deng, E. Kudjo Dzantor, Suping Zhou, Sam Dennis, Roger Sauve, Terrance L. Johnson, Philip A. Fay, Weijun Shen, Yiqi Luo
Effects Of Precipitation Changes On Switchgrass Photosynthesis, Growth, And Biomass: A Mesocosm Experiment, Dafeng Hui, Chih-Li Yu, Qi Deng, E. Kudjo Dzantor, Suping Zhou, Sam Dennis, Roger Sauve, Terrance L. Johnson, Philip A. Fay, Weijun Shen, Yiqi Luo
Agricultural and Environmental Sciences Faculty Research
Climate changes, including chronic changes in precipitation amounts, will influence plant physiology and growth. However, such precipitation effects on switchgrass, a major bioenergy crop, have not been well investigated. We conducted a two-year precipitation simulation experiment using large pots (95 L) in an environmentally controlled greenhouse in Nashville, TN. Five precipitation treatments (ambient precipitation, and -50%, -33%, +33%, and +50% of ambient) were applied in a randomized complete block design with lowland "Alamo" switchgrass plants one year after they were established from tillers. The growing season progression of leaf physiology, tiller number, height, and aboveground biomass were determined each growing …