000			03354nab a22005177a 4500
001			G93315
003			MX-TxCIM
005			20240919021148.0
008			210705s2009 xxu|||p|op||| 00| 0 eng d
022			_a1435-0653 (Online)
022			_a0011-183X
024	8		_ahttps://doi.org/10.2135/cropsci2008.04.0227er
040			_aMX-TxCIM
041			_aeng
090			_aCIS-5549
100	1		_aHernandez-Segundo, E. _920827
245	1	0	_aMega-environment identification for barley based on twenty-seven years of global grain yield data
260			_aUSA : _bCSSA : _bWiley, _c2009.
500			_aPeer review
500			_aPeer-review: Yes - Open Access: Yes|http://science.thomsonreuters.com/cgi-bin/jrnlst/jlresults.cgi?PC=MASTER&ISSN=0011-183X
520			_aKnowledge of target environments in breeding programs is important to better direct the development of germplasm. The objectives of this study were to identify associations among barley (Hordeum vulgare L.) growing environments to identify mega-environments to select the best locations to breed barley. Twenty-seven years of grain yield data from the International Barley Yield Trial (IBYT) conducted by the ICARDA-CIMMYT Barley Breeding Program, consisting of 750 grain yield trials of two replications representing 235 locations in 75 countries, were analyzed using pattern analysis to group sites across years that represent similar selection environments. The shifted multiplicative model (SHMM) was employed to group sites within each year. Environments clustered into three main groups and squared Euclidean distances were used to identify a representative location within each cluster. Group 1 locations were characterized as being cool with intermediate precipitation; Group 2 locations were warmer and drier; and Group 3 sites were generally cool and had the highest average precipitation. The respective representative key locations for each of the three groups were Leida, Spain; Boulifa, Tunisia; and Setif, Algeria. All three key locations are located in the Northern Hemisphere between 36° and 41° latitude. The results of this study show that the global adaptation of barley is possible and can be improved by breeding and selection for adaptation within the three main mega-environments identified.
536			_aGenetic Resources Program
546			_aText in English
591			_aCrop Science Society of America (CSSA)
594			_aCCJL01
650		7	_2AGROVOC _94558 _aEnvironmental factors
650		7	_2AGROVOC _91018 _aBarley
650		7	_2AGROVOC _927180 _aClimatic zones
650		7	_aPlant breeding _gAGROVOC _2 _91203
650		7	_2AGROVOC _98629 _aField Experimentation
650		7	_2AGROVOC _92445 _aSelection criteria
650		7	_2AGROVOC _96026 _aAdaptation
700	1		_aCapettini, F. _92678
700	1		_9341 _aTrethowan, R.M.
700	1		_997 _aGinkel, M. Van
700	1		_920828 _aMejia, A.
700	1		_917940 _aCarballo-Carballo, A.
700	1		_aCrossa, J. _gGenetic Resources Program _8CCJL01 _959
700	1		_93542 _aVargas, M.
700	1		_920829 _aBalbuena-Melgarejo, A.
740			_a93315
740			_a93758
773	0		_tCrop Science _gv. 49, no. 5, p. 1705-1718 _dUSA : CSSA : Wiley, 2009. _wG444244 _x1435-0653
856	4		_yAccess only for CIMMYT Staff _uhttps://hdl.handle.net/20.500.12665/699
942			_cJA _2ddc _n0
999			_c27776 _d27776