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- Title
Prescreening in large populations as a tool for identifying elevated CO<sub>2</sub>-responsive genotypes in plants.
- Authors
Shimono, Hiroyuki; Farquhar, Graham; Brookhouse, Matthew; Busch, Florian A.; O'Grady, Anthony; Tausz, Michael; Pinkard, Elizabeth A.
- Abstract
Elevated atmospheric CO2 concentration (e[CO2]) can stimulate the photosynthesis and productivity of C3 species including food and forest crops. Intraspecific variation in responsiveness to e[CO2] can be exploited to increase productivity under e[CO2]. However, active selection of genotypes to increase productivity under e[CO2] is rarely performed across a wide range of germplasm, because of constraints of space and the cost of CO2 fumigation facilities. If we are to capitalise on recent advances in whole genome sequencing, approaches are required to help overcome these issues of space and cost. Here, we discuss the advantage of applying prescreening as a tool in large genome × e[CO2] experiments, where a surrogate for e[CO2] was used to select cultivars for more detailed analysis under e[CO2] conditions. We discuss why phenotypic prescreening in population-wide screening for e[CO2] responsiveness is necessary, what approaches could be used for prescreening for e[CO2] responsiveness, and how the data can be used to improve genetic selection of high-performing cultivars. We do this within the framework of understanding the strengths and limitations of genotype–phenotype mapping. There is population-wide variation in the responsiveness of trees and crops to higher atmospheric CO2 that could be exploited to improve future productivity but studies are limited by access to suitable facilities. We examined prescreening as a tool in large genome × CO2 experiments to limit the size and cost of experiments. Our review identified approaches that can be used for prescreening and how the data can improve genetic selection of high-performing cultivars.
- Subjects
CARBON dioxide; GENOTYPES; PHOTOSYNTHESIS; GERMPLASM; PHENOTYPES
- Publication
Functional Plant Biology, 2019, Vol 46, Issue 1, p1
- ISSN
1445-4408
- Publication type
Article
- DOI
10.1071/FP18087