000			03233nab a22003617a 4500
999			_c29804 _d29804
001			G97618
003			MX-TxCIM
005			20230815161009.0
008			121211b |||p||p||||||| |z||| |
022			_a2222-3045 (Revista en electrónico)
022	0		_a2220-6663
040			_aMX-TxCIM
041	0		_aEn
090			_aREP-13300
100	1		_aBogale, A.
245	0	0	_aMorphological and physiological attributes associated to drought tolerance of Ethiopian durum wheat genotypes under water deficit condition
260			_c2011
500			_aPrior to CIMMYT affiliation
500			_aPeer review
500			_aOpen Access
520			_aThe experiment was conducted to assess the differential morpho-physiological response to stimulated water deficit and to determine the relationship between some of these morphological and physiological traits and yield components of eighteen durum wheat genotypes grown in pots under lathhouse condition. Water deficit significantly affected gas exchange and chlorophyll fluorescence parameters. It reduced the net photosynthesis rate (Pn), transpiration rate (E) and stomatal conductance (gs) measured both at anthesis and grain-filling stages. Similarly, the value of initial fluorescence (Fo) was increased while variable fluorescence (Fv), maximum fluorescence (Fm) and optimum quantum yield fluorescence (Fv/Fm) were decreased under water deficit. RWC of the leaves was decreased by 36.7% while SLA increased by 12.6% due to moisture stress relative to the well-watered control. No significant correlations were found between chlorophyll fluorescence parameters and grain yield under water deficit condition. Similarly, no significant correlations were found between leaf gas exchange parameters and grain yield. On the other hand, peduncle length and excursion were positively correlated with grain yield while negatively correlated with drought susceptibility index under water deficit condition. Leaf posture and rolling had also a profound effect on grain yield and other attributes. Erect-leaved genotypes had more grain yield, HI, kernel numbers per spikelet and grain-filling rate but had lower kernel weight than droopy leaved. Similarly, genotypes exhibited strong leaf rolling under water deficit condition had more grain yield, kernel numbers per spike and water use efficiency. The genetic variability found for leaf posture, leaf rolling, peduncle length and excursion among the Ethiopian durum wheat genotypes suggests the opportunity for selection superior and adapted genotype in water-limited environments. These can be achieved by integrating these morphological traits as indirect selection in conjunction with other yield components.
526			_d
536			_aSocioeconomics Program
546			_aText in English
591			_aFantaye, K. T. : No CIMMYT affiliation
594			_aINT3458
595			_aRPC
700	1		_aGeleto, T., _ecoaut.
700	1		_aFantaye, K.T. _gSocioeconomics Program _gSustainable Agrifood Systems _8INT3458 _9956
773	0		_tJournal of Biodiversity and Environmental Sciences _gv. 1, no. 2, p. 22-36
856	4		_uhttps://innspub.net/volume-1-number-2-april-2011-2/ _yClick here to access online
942			_cJA _2ddc _n0