Optimizing Winter Wheat Resilience to Climate Change in Rain Fed Crop Systems of Turkey and Iran
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Author
Lopes, Marta S.
Alvaro, Fanny
Sanchez-Garcia, Miguel
Ozer, Emel
Ozdemir, Fatih
Karaman, Mehmet
Roustaii, Mozaffar
Jalal-Kamali, Mohammad R.
Pequeno, Diego
Publication date
2018-05-01ISSN
1664-462X
Abstract
Erratic weather patterns associated with increased temperatures and decreasing rainfall
pose unique challenges for wheat breeders playing a key part in the fight to ensure
global food security. Within rain fed winter wheat areas of Turkey and Iran, unusual
weather patterns may prevent attaining maximum potential increases in winter wheat
genetic gains. This is primarily related to the fact that the yield ranking of tested
genotypes may change from one year to the next. Changing weather patterns may
interfere with the decisions breeders make about the ideotype(s) they should aim for
during selection. To inform breeding decisions, this study aimed to optimize major
traits by modeling different combinations of environments (locations and years) and
by defining a probabilistic range of trait variations [phenology and plant height (PH)]
that maximized grain yields (GYs; one wheat line with optimal heading and height is
suggested for use as a testing line to aid selection calibration decisions). Research
revealed that optimal phenology was highly related to the temperature and to rainfall
at which winter wheat genotypes were exposed around heading time (20 days before
and after heading). Specifically, later winter wheat genotypes were exposed to higher
temperatures both before and after heading, increased rainfall at the vegetative stage,
and reduced rainfall during grain filling compared to early genotypes. These variations in
exposure to weather conditions resulted in shorter grain filling duration and lower GYs
in long-duration genotypes. This research tested if diversity within species may increase
resilience to erratic weather patterns. For the study, calculated production of a selection
of five high yielding genotypes (if grown in five plots) was tested against monoculture
(if only a single genotype grown in the same area) and revealed that a set of diverse
genotypes with different phenologies and PHs was not beneficial. New strategies of
progeny selection are discussed: narrow range of variation for phenology in families
may facilitate the discovery and selection of new drought-resistant and avoidant wheat
lines targeting specific locations
Document Type
Article
Document version
Published version
Language
English
Pages
14
Publisher
Frontiers Media
Is part of
Frontiers in Plant Science
Citation
Lopes Marta S, Royo Conxita, Alvaro Fanny, Sanchez-Garcia Miguel, Ozer Emel, Ozdemir Fatih, Karaman Mehmet, Roustaii Mozaffar, Jalal-Kamali Mohammad R and Pequeno Diego (2018) "Optimizing Winter Wheat Resilience to Climate Change in Rain Fed Crop Systems of Turkey and Iran". Front. Plant Sci. 9:563. doi: 10.3389/fpls.2018.00563.
Program
Cultius Extensius Sostenibles
This item appears in the following Collection(s)
- ARTICLES CIENTÍFICS [2831]
Except where otherwise noted, this item's license is described as http://creativecommons.org/licenses/by/4.0/