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District specific, in silico evaluation of rice ideotypes improved for resistance/tolerance traits to biotic and abiotic stressors under climate change scenarios

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Listed:
  • L. Paleari
  • G. Cappelli
  • S. Bregaglio
  • M. Acutis
  • M. Donatelli
  • G. Sacchi
  • E. Lupotto
  • M. Boschetti
  • G. Manfron
  • R. Confalonieri

Abstract

Using crop models as supporting tools for analyzing the interaction between genotype and environment represents an opportunity to identify priorities within breeding programs. This study represents the first attempt to use simulation models to define rice ideotypes improved for their resistance to biotic stressors (i.e., diseases); moreover, it extends approaches for evaluating the impact of changes in traits for tolerance to abiotic constraints (temperature shocks inducing sterility). The analysis—targeting the improvement of 34 varieties in six Italian rice districts—was focused on the impact of blast disease, and of pre-flowering cold- and heat-induced spikelet sterility. In silico ideotypes were tested at 5-km spatial resolution under current conditions and climate change scenarios centered on 2020, 2050, and 2085, derived according to the projections of two general circulation models–Hadley and NCAR–for two IPCC emission scenarios–A1B and B1. The study was performed using a dedicated simulation platform, i.e., ISIde, explicitly developed for ideotyping studies. The ideotypes improved for blast resistance obtained clear yield increases for all the combinations GCM × emission scenario × time horizon, i.e., 12.1 % average yield increase under current climate, although slightly decreasing for time windows approaching the end of the century and with a marked spatial heterogeneity in responses across districts. Concerning abiotic stressors, increasing tolerance to cold-induced sterility would lead to a substantial yield increase (+9.8 %) only for Indica-type varieties under current climate, whereas no increases are expected under future conditions and, in general, for Japonica-type varieties. Given the process-based logic behind the models used—supporting coherence of model responses under future scenarios—this study provides useful information for rice breeding programs to be realized in the medium-long term. Copyright Springer Science+Business Media Dordrecht 2015

Suggested Citation

  • L. Paleari & G. Cappelli & S. Bregaglio & M. Acutis & M. Donatelli & G. Sacchi & E. Lupotto & M. Boschetti & G. Manfron & R. Confalonieri, 2015. "District specific, in silico evaluation of rice ideotypes improved for resistance/tolerance traits to biotic and abiotic stressors under climate change scenarios," Climatic Change, Springer, vol. 132(4), pages 661-675, October.
    • Handle: RePEc:spr:climat:v:132:y:2015:i:4:p:661-675
    DOI: 10.1007/s10584-015-1457-4
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    References listed on IDEAS

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    1. Boote, K. J. & Kropff, M. J. & Bindraban, P. S., 2001. "Physiology and modelling of traits in crop plants: implications for genetic improvement," Agricultural Systems, Elsevier, vol. 70(2-3), pages 395-420.
    2. Vida-Lina Esperanza B. Alpuerto & George W. Norton & Jeffrey Alwang & Abdelbagi M. Ismail, 2009. "Economic Impact Analysis of Marker-Assisted Breeding for Tolerance to Salinity and Phosphorous Deficiency in Rice," Review of Agricultural Economics, Agricultural and Applied Economics Association, vol. 31(4), pages 779-792, December.
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    1. Bregaglio, Simone & Orlando, Francesca & Forni, Emanuela & De Gregorio, Tommaso & Falzoi, Simone & Boni, Chiara & Pisetta, Michele & Confalonieri, Roberto, 2016. "Development and evaluation of new modelling solutions to simulate hazelnut (Corylus avellana L.) growth and development," Ecological Modelling, Elsevier, vol. 329(C), pages 86-99.

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