000			03682nab a22003737a 4500
001			G89938
003			MX-TxCIM
005			20230914212646.0
008			210917s2007 ne |||p|op||| 00| 0 eng d
022			_a0378-4290
024	8		_ahttps://doi.org/10.1016/j.fcr.2006.07.005
040			_aMX-TxCIM
041			_aeng
090			_aCIS-5011
100	1		_aDreccer, M.F. _98506
245	1	0	_aCIMMYT-selected derived synthetic bread wheats for rainfed environments : _byield evaluation in Mexico and Australia
260			_aAmsterdam (Netherlands) : _bElsevier, _c2007.
340			_aComputer File|Printed
500			_aPeer review
500			_aPeer-review: Yes - Open Access: Yes|http://science.thomsonreuters.com/cgi-bin/jrnlst/jlresults.cgi?PC=MASTER&ISSN=0378-4290
520			_aSynthetic backcrossed-derived bread wheats (SBWs) from CIMMYT were grown in the Northwest of Mexico at Centro de Investigaciones Agrícolas del Noroeste (CIANO) and sites across Australia during three seasons. During three consecutive years Australia received “shipments” of different SBWs from CIMMYT for evaluation. A different set of lines was evaluated each season, as new materials became available from the CIMMYT crop enhancement program. These consisted of approximately 100 advanced lines (F7) per year. SBWs had been top and backcrossed to CIMMYT cultivars in the first two shipments and to Australian wheat cultivars in the third one. At CIANO, the SBWs were trialled under receding soil moisture conditions. We evaluated both the performance of each line across all environments and the genotype-by-environment interaction using an analysis that fits a multiplicative mixed model, adjusted for spatial field trends. Data were organised in three groups of multienvironment trials (MET) containing germplasm from shipment 1 (METShip1), 2 (METShip2), and 3 (METShip3), respectively. Large components of variance for the genotype × environment interaction were found for each MET analysis, due to the diversity of environments included and the limited replication over years (only in METShip2, lines were tested over 2 years). The average percentage of genetic variance explained by the factor analytic models with two factors was 50.3% for METShip1, 46.7% for METShip2, and 48.7% for METShip3. Yield comparison focused only on lines that were present in all locations within a METShip, or “core” SBWs. A number of core SBWs, crossed to both Australian and CIMMYT backgrounds, outperformed the local benchmark checks at sites from the northern end of the Australian wheat belt, with reduced success at more southern locations. In general, lines that succeeded in the north were different from those in the south. The moderate positive genetic correlation between CIANO and locations in the northern wheat growing region likely reflects similarities in average temperature during flowering, high evaporative demand, and a short flowering interval. We are currently studying attributes of this germplasm that may contribute to adaptation, with the aim of improving the selection process in both Mexico and Australia.
546			_aText in English
591			_aElsevier
650		7	_aBreeding _2AGROVOC _91029
650	1	0	_91080 _aDrought _2AGROVOC
650	1	0	_aSynthetic wheat
700	1		_aBorgognone, M.G. _915946
700	1		_aOgbonnaya, F.C. _9237
700	1		_9341 _aTrethowan, R.M.
700	1		_aWinter, B. _923171
773	0		_tField Crops Research _n634762 _gv. 100, no. 2-3, p. 218-228 _dAmsterdam (Netherlands) : Elsevier, 2007. _wG444314 _x0378-4290
856	4		_yAccess only for CIMMYT Staff _uhttps://hdl.handle.net/20.500.12665/1459
942			_cJA _2ddc _n0
999			_c26735 _d26735