000			02448nab|a22003497a|4500
999			_c62889 _d62881
001			62889
003			MX-TxCIM
005			20240919021229.0
008			201107s2012||||xxk|||p|op||||00||0|eng|d
022			_a0021-8596
022			_a1469-5146 (Online)
024	8		_ahttps://doi.org/10.1017/S0021859611000712
040			_aMX-TxCIM
041			_aeng
100	1		_aDjemel, A. _917112
245	1	0	_aGenetic effects on fitness of the mutant sugary1 in wild-type maize
260			_aUnited Kingdom : _bCambridge University Press, _c2012.
500			_aPeer review
520			_aKnowing the genetic regulation of fitness is crucial for using mutants in breeding programmes, particularly when the mutant is deleterious in some genetic backgrounds, as it happens with the sweet corn mutant sugary1 (su1) in maize (Zea mays L.). The fitness and genetic effects of maize mutant su1 were monitored through five successive selfing generations in two separated mean-generation designs. The first involved two inbreds with similar genetic backgrounds, while unrelated inbreds were used for the second design. Parents, F1s, F2s, and backcrosses were crossed to P39 as the donor of su1 and the 12 crosses were successively self-pollinated for 5 years. The su1 frequency decreased linearly across selfing generations in both designs. Additive effects were significant for su1 seed viability. However, dominance effects were of higher magnitude than additive effects, even though the dominance effects were not significant. Genetic effects depended on genotypes and environments. Therefore, the fitness of su1 is under genetic control, with significant additive effects due to minor contributions of multiple genes. The fitness of su1 is strongly affected by maize genotypic background and environment. It is hypothesized that genotypes could have evolutionary potential for modulating the fitness of single mutations.
546			_aText in English
650		7	_aMutants _2AGROVOC _94079
650		7	_aMaize _gAGROVOC _2 _91173
650		7	_aGenetics _2AGROVOC _91130
650		7	_aVigour _2AGROVOC _911571
650		7	_aPlant breeding _gAGROVOC _2 _91203
700	1		_917113 _aOrdás, B.
700	1		_917114 _aKhelifi, L.
700	1		_917115 _aOrdás, A.
700	1		_917116 _aRevilla, P.
773	0		_gv. 150, no. 5, p. 603-609 _dUnited Kingdom : Cambridge University Press, 2012. _x0021-8596 _tJournal of Agricultural Science _wu444500
942			_cJA _n0 _2ddc