Surfing parameter hyperspaces under climate change scenarios to design future rice ideotypes. (5th April 2017)

• Record Type: Journal Article
• Authors: Paleari, Livia; Movedi, Ermes; Cappelli, Giovanni; Wilson, Lloyd T.; Confalonieri, Roberto
• Is Part Of: Global change biology. Volume 23:Number 11(2017)
• Page Start: 4651
• Page End: 4662
• Publication Date: 2017-04-05
• Subjects: blast -- canopy structure -- chalkiness -- head rice -- photosynthetic efficiency -- sensitivity analysis -- spikelet sterility -- WARM; Climatic changes -- Environmental aspects -- Periodicals; Troposphere -- Environmental aspects -- Periodicals; Biodiversity conservation -- Periodicals; Eutrophication -- Periodicals; 551.5
• DOI: 10.1111/gcb.13682
• Languages: English
• ISSNs: 1354-1013

Abstract

Abstract: Growing food crops to meet global demand and the search for more sustainable cropping systems are increasing the need for new cultivars in key production areas. This study presents the identification of rice traits putatively producing the largest yield benefits in five areas that markedly differ in terms of environmental conditions in the Philippines, India, China, Japan and Italy. The ecophysiological model WARM and sensitivity analysis techniques were used to evaluate phenotypic traits involved with light interception, photosynthetic efficiency, tolerance to abiotic stressors, resistance to fungal pathogens and grain quality. The analysis involved only model parameters that have a close relationship with phenotypic traits breeders are working on, to increase the in vivo feasibility of selected ideotypes. Current climate and future projections were considered, in the light of the resources required by breeding programs and of the role of weather variables in the identification of promising traits. Results suggest that breeding for traits involved with disease resistance, and tolerance to cold‐ and heat‐induced spikelet sterility could provide benefits similar to those obtained from the improvement of traits involved with canopy structure and photosynthetic efficiency. In contrast, potential benefits deriving from improved grain quality traits are restricted by weather variability and markedly affected by G × E interactions. For this reason, district‐specific ideotypes were identified using a new index accounting for both their productivity and feasibility. Abstract : The ecophysiological model WARM and sensitivity analysis techniques were used to evaluate rice phenotypic traits involved with light interception, photosynthetic efficiency, tolerance to abiotic stressors, resistance to fungal pathogens and grain quality. Current conditions and climate change projections were considered in five rice production areas differing in terms of environmental conditions in the Philippines, India, China, Japan and Italy. Strong G × E interactions affected results, thus leading to define rice district‐specific ideotypes via a new index accounting for both their productivity and feasibility.