000			03284nab a22004577a 4500
001			G89964
003			MX-TxCIM
005			20240919021147.0
008			210920s2007 at |||p|op||| 00| 0 eng d
022			_a1445-4408
022			_a1445-4416 (Online)
024	8		_ahttps://doi.org/10.1071/FP06148
040			_aMX-TxCIM
041			_aeng
090			_aCIS-5035
100	1		_aOlivares-Villegas, J.J. _923188
245	1	0	_aDrought-adaptive attributes in the Seri/Babax hexaploid wheat population
260			_aVictoria (Australia) : _bCSIRO Publishing, _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=1445-4408
520			_aAgronomic and physiological traits associated with drought adaptation were assessed within the Seri/Babax recombinant inbred line population, which was derived from parents similar in height and maturity but divergent in their sensitivity to drought. Field trials under different water regimes were conducted over 3 years in Mexico and under rainfed conditions in Australia. Under drought, canopy temperature (CT) was the single-most drought-adaptive trait contributing to a higher performance (r2 = 0.74, P < 0.0001), highly heritable (h2 = 0.65, P < 0.0001) and consistently associated with yield phenotypically (r = –0.75, P < 0.0001) and genetically [R (g) = −0.95, P < 0.0001]. CT epitomises a mechanism of dehydration avoidance expressed throughout the cycle and across latitudes, which can be utilised as a selection criteria to identify high-yielding wheat genotypes or as an important predictor of yield performance under drought. Early response under drought, suggested by a high association of CT with estimates of biomass at booting (r = −0.44, P < 0.0001), leaf chlorophyll (r = −0.22 P < 0.0001) and plant height (r = −0.64, P < 0.0001), contrast with the small relationships with anthesis and maturity (averaged, r = −0.10, P < 0.0001), and with osmotic potential (r = −0.20, P < 0.0001). Results suggest that the ability to extract water from the soil under increasing soil water deficit is a major attribute of drought adaptation. The genetic variation and transgressive segregation suggest further genomic and transcriptomic studies for unravelling the complex relationship between drought adaptation and performance under drought.
536			_aGlobal Wheat Program
546			_aText in English
591			_aCSIRO
592			_aAU-UAde 2007 OLIVARES-VILLEGAS D r
594			_aINT1511
650		7	_aDrought tolerance _2AGROVOC _91082
650		7	_aAdaptation _2AGROVOC _96026
650		7	_aCanopy _2AGROVOC _91800
650		7	_aTemperature _2AGROVOC _97940
650		7	_aPlant breeding _gAGROVOC _2 _91203
650		7	_aYield potential _2AGROVOC _930986
700	1		_aReynolds, M.P. _gGlobal Wheat Program _8INT1511 _9831
700	1		_911935 _aMcDonald, G.K.
740			_a89964
740			_a90019
773	0		_tFunctional Plant Biology _n634789 _gv. 34, no. 3, p. 189-203 _dVictoria (Australia) : CSIRO Publishing, 2007. _wG447878 _x1445-4408
856	4		_yAccess only for CIMMYT Staff _uhttps://hdl.handle.net/20.500.12665/1414
942			_cJA _2ddc _n0
999			_c26761 _d26761