000			03400nab a22003737a 4500
999			_c58081 _d58073
001			58081
003			MX-TxCIM
005			20240919021225.0
008			160126s2016 ne |||p|op||| 00| 0 eng d
024	8		_ahttps://doi.org/10.1016/j.fcr.2016.04.017
040			_aMX-TxCIM
041			_aeng
100	1		_aMondal, S. _gFormerly Global Wheat Program _8INT3211 _9904
245	1	0	_aGrain yield, adaptation and progress in breeding for early-maturing and heat-tolerant wheat lines in South Asia _h[Electronic Resource]
260			_aAmsterdam, Netherlands : _bElsevier, _c2016.
500			_aPeer review
500			_aOpen Access
520			_aMaintaining wheat productivity under the increasing temperatures in South Asia is a challenge. We focused on developing early maturing wheat lines as an adaptive mechanism in regions suffering from terminal heat stress and those areas that require wheat adapted to shorter cycles under continual high temperature stress. We evaluated the grain yield performance of early-maturing heat-tolerant germplasm developed by CIMMYT, Mexico at diverse locations in South Asia from 2009 to 2014 and estimated the breeding progress for high-yielding and early-maturing heat-tolerant germplasm in South Asia. Each year the trial comprised of 28 new entries, one CIMMYT check (Baj) and a local check variety. Locations were classified by mega environment (ME); ME1 being the temperate irrigated locations with terminal high temperature stress, and ME5 as hot, sub-tropical, irrigated locations. Grain yield (GY), days to heading (DTH) and plant height (PH) were recorded at each location. Effect of temperature on GY was observed in both ME1 and ME5. Across years, mean minimum temperatures in ME1 and mean maximum temperatures in ME5 during grain filling had significant negative association with GY. The ME1 locations were cooler that those in ME5 in the 5 years of evaluations and had a 1–2 t/ha higher GY. A mean reduction of 20 days for DTH and 20 cm in PH was observed in ME5. Negative genetic correlations of −0.43 to −0.79 were observed between GY and DTH in South Asia during 2009–2014. Each year, we identified early-maturing germplasm with higher grain yield than the local checks. A positive trend was observed while estimating the breeding progress across five years for high-yielding early-maturing heat tolerant wheat compared to the local checks in South Asia. The results suggests the potential of the high-yielding early-maturing wheat lines developed at CIMMYT in improving wheat production and maintaining genetic gains in South Asia.
546			_aText in english
591			_bCIMMYT Informa No. 1983
650		7	_aWheat _gAGROVOC _2 _91310
650		7	_91972 _aHeat tolerance _gAGROVOC
650		7	_aPlant breeding _gAGROVOC _2 _91203
650		7	_96137 _aYield factors _2AGROVOC
651		7	_91956 _aSouth Asia _gAGROVOC
700	1		_aSingh, R.P. _gGlobal Wheat Program _8INT0610 _9825
700	1		_aHuerta-Espino, J. _gGlobal Wheat Program _8CHUE01 _9397
700	1		_9969 _aAutrique, E. _8N1203511 _gGlobal Wheat Program
700	1		_9873 _aJoshi, A.K. _gGlobal Wheat Program _8INT2917
700	1		_aMason, R.E. _93848
773	0		_wu444314 _x0378-4290 (Print) _dAmsterdam (Netherlands) : Elsevier _tField Crops Research _gv. 192, p. 78-85
856	4		_uhttp://hdl.handle.net/10883/18548 _yOpen Access through DSpace
942			_2ddc _cJA _n0