000			03369nab a22004097a 4500
999			_c59111 _d59103
001			59111
003			MX-TxCIM
005			20211006085141.0
008			180129s2017 ne |||p| p||| 00| 0 eng d
024	8		_ahttps://doi.org/10.1007/s10681-017-2048-4
040			_aMX-TxCIM
041			_aeng
100	1		_96186 _aNjeri, S. G.
245	1	0	_aGenetic analysis of tropical quality protein maize (Zea mays L.) germplasm _h[Electronic Resource]
260			_aNetherlands : _bSpringer, _c2017.
500			_aPeer review
500			_aOpen Access
520			_aMaize (Zea mays L.) is an important source of carbohydrates and protein in the diet in sub-Saharan Africa. The objectives of this study were to (i) estimate general (GCA) and specific combining abilities (SCA) of 13 new quality protein maize (QPM) lines in a diallel under stress and non-stress conditions, (ii) compare observed and predicted performance of QPM hybrids, (iii) characterize genetic diversity among the 13 QPM lines using single nucleotide polymorphism (SNP) markers and assess the relationship between genetic distance and hybrid performance, and (iv) assess diversity and population structure in 116 new QPM inbred lines as compared to eight older tropical QPM lines and 15 non-QPM lines. The GCA and SCA effects were significant for most traits under optimal conditions, indicating that both additive and non-additive genetic effects were important for inheritance of the traits. Additive genetic effects appeared to govern inheritance of most traits under optimal conditions and across environments. Non-additive genetic effects were more important for inheritance of grain yield but additive effects controlled most agronomic traits under drought stress conditions. Inbred lines CKL08056, CKL07292, and CKL07001 had desirable GCA effects for grain yield across drought stress and non-stress conditions. Prediction efficiency for grain yield was highest under optimal conditions. The classification of 139 inbred lines with 95 SNPs generated six clusters, four of which contained 10 or fewer lines, and 16 lines of mixed co-ancestry. There was good agreement between Neighbor Joining dendrogram and Structure classification. The QPM lines used in the diallel were nearly uniformly spread throughout the dendrogram. There was no relationship between genetic distance and grain yield in either the optimal or stressed environments in this study. The genetic diversity in mid-altitude maize germplasm is ample, and the addition of the QPM germplasm did not increase it measurably.
526			_aMCRP _bFP3
546			_aText in English
650		7	_aMaize _gAGROVOC _2 _91173
650		7	_92367 _aCombining ability _2AGROVOC
650		7	_aGermplasm _gAGROVOC _2 _91136
650		7	_91081 _aDrought stress _2AGROVOC
650		7	_aGenetic variation _gAGROVOC _2 _91129
650		7	_94697 _aNucleotides _2AGROVOC
650		7	_91223 _aProtein quality _2AGROVOC
650		7	_91937 _aNucleotide sequence _2AGROVOC
700	1		_9858 _aMakumbi, D. _gGlobal Maize Program _8INT2765
700	1		_94138 _aWarburton, M.L.
700	1		_969 _aDiallo, A.
700	1		_9962 _aJumbo, M.B. _8INT3488 _gGlobal Maize Program
700	1		_948 _aChemining’wa, G.N.
773	0		_gno. 213:261 _tEuphytica _wu444298
856	4		_yOpen Access through DSpace _uhttps://hdl.handle.net/10883/19199
942			_2ddc _cJA _n0