000			03400nab a22004217a 4500
999			_c30434 _d30434
001			G98564
003			MX-TxCIM
005			20240919020947.0
008			210712s2013 xxk|||p|op||| 00| 0 eng d
022			_a1471-2954 (Online)
022	0		_a0962-8452
024	8		_ahttps://doi.org/10.1098/rspb.2012.2190
040			_aMX-TxCIM
041			_aeng
090			_aCIS-7453
100	1		_aGourdji, S.M. _921133
245	1	2	_aAn assessment of wheat yield sensitivity and breeding gains in hot environments
260			_aUnited Kingdom : _bThe Royal Society, _c2013.
500			_aPeer review
500			_aPeer-review: Yes - Open Access: Yes|http://ip-science.thomsonreuters.com/cgi-bin/jrnlst/jlresults.cgi?PC=MASTER&ISSN=0962-8452
520			_aGenetic improvements in heat tolerance of wheat provide a potential adaptation response to long-term warming trends, and may also boost yields in wheat-growing areas already subject to heat stress. Yet there have been few assessments of recent progress in breeding wheat for hot environments. Here, data from 25 years of wheat trials in 76 countries from the International Maize and Wheat Improvement Center (CIMMYT) are used to empirically model the response of wheat to environmental variation and assess the genetic gains over time in different environments and for different breeding strategies. Wheat yields exhibited the most sensitivity to warming during the grain-filling stage, typically the hottest part of the season. Sites with high vapour pressure deficit (VPD) exhibited a less negative response to temperatures during this period, probably associated with increased transpirational cooling. Genetic improvements were assessed by using the empirical model to correct observed yield growth for changes in environmental conditions and management over time. These ?climate-corrected? yield trends showed that most of the genetic gains in the high-yield-potential Elite Spring Wheat Yield Trial (ESWYT) were made at cooler temperatures, close to the physiological optimum, with no evidence for genetic gains at the hottest temperatures. In contrast, the Semi-Arid Wheat Yield Trial (SAWYT), a lower-yielding nursery targeted at maintaining yields under stressed conditions, showed the strongest genetic gains at the hottest temperatures. These results imply that targeted breeding efforts help us to ensure progress in building heat tolerance, and that intensified (and possibly new) approaches are needed to improve the yield potential of wheat in hot environments in order to maintain global food security in a warmer climate.
536			_aGlobal Wheat Program|Genetic Resources Program
546			_aText in English
591			_aCIMMYT Informa No. 1874
594			_aINT3234|INT1511|CCJL01
595			_aCSC
650	1	7	_aBreeding _gAGROVOC _2 _91029
650	1	0	_91972 _aHeat tolerance _2AGROVOC
650	1	0	_aWheat
650	1	0	_91045 _aClimate change _2AGROVOC
700	1		_aMathews, K. _93392
700	1		_aReynolds, M.P. _gGlobal Wheat Program _8INT1511 _9831
700	1		_aCrossa, J. _gGenetic Resources Program _8CCJL01 _959
700	1		_93819 _aLobell, D.B.
773	0		_tProceedings of the Royal Society B: Biological Sciences _gv. 280, no. 1752, p. 1-8 _dUnited Kingdom : The Royal Society, 2013. _x0962-8452
856	4		_uhttps://hdl.handle.net/20.500.12665/709 _yAccess only for CIMMYT Staff
942			_cJA _2ddc _n0