000			03256nab|a22003977a|4500
001			65282
003			MX-TxCIM
005			20231013184537.0
008			20221s2022||||mx |||p|op||||00||0|eng|d
022			_a0931-2250
022			_a1439-037X (Online)
024	8		_ahttps://doi.org/10.1111/jac.12592
040			_aMX-TxCIM
041			_aeng
100	1		_aMusimwa, T.R. _927423
245	1	1	_aPhenotypic assessment of genetic gain from selection for improved drought tolerance in semi-tropical maize populations
260			_bWiley, _c2023. _aUnited Kingdom :
500			_aPeer review
500			_aOpen Access
520			_aMost maize production across the globe is rain-fed, and production is set to be negatively impacted as duration and occurrence of droughts increases due to climate change. Development of water-deficit tolerant maize germplasm has been a major focus for most breeding programmes. Here, we sought to assess the genetic gain for grain yield in two maize populations developed for drought tolerance at CIMMYT by evaluating their cycle progeny through hybrid performance. Inbreds derived from different cycles of the Drought Tolerant Population (DTP) and La Posta Sequia (LPS) were mated to a tester (CML550), and resulting hybrids were evaluated under managed water-deficit stress and well-watered conditions. The difference in yield between water-deficit and well-watered treatments was 27% and 36% for the DTP and LPS, respectively. Genetic gain for grain yield across cycles for the two populations was confirmed in the study. Genetic gain was observed for both treatments indicating that selection for water-deficit stress tolerance simultaneously improves grain yield in well-watered conditions. The DTP population had a genetic gain of 0.07 t ha−1 cycle−1, while the LPS had 0.16 t ha−1 cycle−1 under water-deficit conditions. Significant genetic gain was also observed in the well-watered treatments for both populations. Anthesis to silking interval was significantly reduced under water-deficit stress conditions in both populations. Plant and ear height were reduced in the LPS population in both treatments, while no reductions were observed for the trait in the DTP population. Potential water-deficit stress tolerance donor lines with yields comparable to commercial check varieties were identified.
546			_aText in English
650		7	_aDrought tolerance _2AGROVOC _91082
650		7	_aWater _2AGROVOC _94355
650		7	_aMaize _2AGROVOC _91173
650		7	_aClimate change _2AGROVOC _91045
650		7	_aGenetic gain _2AGROVOC _92091
700	1		_aMolnar, T.L. _8I1706071 _9802 _gFormerly Genetic Resources Program
700	1		_aDutta, S. _911574
700	1		_aDhliwayo, T. _8INT3355 _9935 _gGlobal Maize Program
700	1		_aTrachsel, S. _8INT3300 _9914 _gGlobal Maize Program
700	1		_aLee, M. _95361
773	0		_tJournal of Agronomy and Crop Science _dUnited Kingdom : Wiley, 2023 _x0931-2250 _gv. 209, no. 1, p. 71-82 _wG444504
856			_yOpen Access through DSpace _uhttps://hdl.handle.net/10883/22070
942			_cJA _n0 _2ddc
999			_c65282 _d65274