000			02239nam a22002657a 4500
001			G98676
003			MX-TxCIM
005			20211006082022.0
008			121211s ||||f| 0 p|p||0|| |
040			_aMX-TxCIM
090			_aCIS-7511
100	1		_9898 _aCossani, C.M. _gGlobal Wheat Program _8INT3189
245	0	0	_aCan genotypic variability in membrane thermo-stability and chlorophyll fluorescence be used to improve heat tolerance in wheat?
260			_c2013
300			_a1 page
500			_aAbstract only
520			_aImproving wheat?s adaptation to higher temperatures would underpin its resilience to climate change in the coming decades, especially at low latitudes where 280 million tons of wheat are produced on over 100 million ha. While genetic gains of wheat yield in hot environments have been achieved, the crop still shows significant productivity losses in warmer than average years. Membranes are known to be disrupted by high temperature impeding many physiological processes including photosynthesis and transport. Both electrolyte leakage (EL) and chlorophyll fluorescence (CF) measure different, though probably overlapping, aspects of membrane thermo-stability, and neither have been systematically deployed in genetic resource screening or breeding. Before that can happen, screening methodologies need to be developed that maximize the resolution for their genetic expression. This study compares expression of EL and CF at different growth stages and in contrasting thermal regimes in order to establish such protocols Both EL and CF were measured on flag leaves at different reproductive stages of wheat Genotypic variability for membrane thermo-stability was estimated in elite sets of Mexican and Iranian landraces, as well in lines derived from re-synthesized hexaploid wheat and elite lines. Lines encompassing complementary physiological characteristics -including favorable expression of EL and CF- are used as parents for designing strategic crosses to accumulate heat adaptive alleles.
536			_aGlobal Wheat Program
546			_aEnglish
593			_aLucia Segura
594			_aINT3189|INT1511
595			_aCSC
700	1		_aReynolds, M.P. _gGlobal Wheat Program _8INT1511 _9831
942			_cPRO
999			_c8743 _d8743