000			02788nab|a22003257a|4500
001			66357
003			MX-TxCIM
005			20230904180010.0
008			20236s2023||||mx |||p|op||||00||0|eng|d
022			_a2073-4395 (Online)
024	8		_ahttps://doi.org/10.3390/agronomy13061605
040			_aMX-TxCIM
041			_aeng
100	0		_aRejoice Shumirai Nyoni _931315
245	1	0	_aPotential of temperate, tropical, and sub-tropical exotic maize germplasm for increased gains in yield performance in sub-tropical breeding programs
260			_bMDPI, _c2023. _aBasel (Switzerland) :
500			_aPeer review
500			_aOpen Access
520			_aExotic germplasm (i.e., germplasm beyond the breeder’s target area) has traditionally been used to broaden the genetic base of local (germplasm within the breeder’s target area) populations, but little has been done to assess gains that could be induced by this breeding practice in the sub-tropical regions of Africa. Here, eight maize (Zea mays L.) inbred lines developed from pedigree crosses of exotic and local (i.e., sub-tropically adapted lines; STALs) were inter-mated together with six elite STALs, in a partial diallel mating scheme, in order to depict yield gains that can be made when exotic genes are integrated within the sub-tropical maize germplasm pool. The crossing scheme yielded a total of 91 F1s which were evaluated together with nine commercial checks in multi-environmental trials (METs) at eight locations representing agro-ecologies in which maize is predominantly grown in Zimbabwe. Across site Analysis of Variance (ANOVA) showed differences in grain yield (GY) performance of the F1s. Significant genotype x environment effects was also detected for GY (i.e., GEI; p < 0.05). F1s of parents with a temperate background [i.e., P7 (S) x P2 (T)] showed the highest GY potential (e.g., G44; GY = 10.52 tha−1). Apart from showing high GY potential, G44 also demonstrated to be stable across diverse agro-ecologies and to mature earlier than the best commercial check hybrid. In conclusion, incorporation of exotic genes, especially those from temperate regions, may improve the yielding ability and stability and can introduce earliness in the maturity of maize populations in sub-tropical regions.
546			_aText in English
591			_aMagorokosho, C. : No CIMMYT Affiliation
650		7	_aAdaptability _2AGROVOC _94632
650		7	_aExotic germplasm _2AGROVOC _929317
650		7	_aInbred lines _2AGROVOC _91155
650		7	_aMaize _2AGROVOC _91173
700	1		_aMagorokosho, C. _8INT2714 _9854 _gFormerly Global Maize Program
700	0		_aCasper Nyaradzai Kamutando _918316
773	0		_tAgronomy _gv. 13, no. 6, art. 1605 _dBasel (Switzerland) : MDPI, 2023 _x2073-4395
942			_cJA _n0 _2ddc
999			_c66357 _d66349