000			03432nab a22004817a 4500
001			G95347
003			MX-TxCIM
005			20230710205530.0
008			211110s2011 ne |||p|op||| 00| 0 eng d
022			_a1573-5060 (Online)
022	0		_a0014-2336
024	8		_ahttps://doi.org/10.1007/s10681-011-0376-3
040			_aMX-TxCIM
041			_aeng
090			_aCIS-6357
100	1		_aKebede, A. Z. _96575
245	1	0	_aEffect of source germplasm and season on the in vivo haploid induction rate in tropical maize
260			_aDordrecht (Netherlands) : _bSpringer, _c2011.
500			_aPeer review
500			_aPeer-review: Yes - Open Access: Yes|http://science.thomsonreuters.com/cgi-bin/jrnlst/jlresults.cgi?PC=MASTER&ISSN=0014-2336
520			_aFor in vivo production of doubled haploid (DH) lines in maize, the rate of haploid induction is of crucial importance. Maternal haploid induction depends primarily on the inducer used as a pollinator. However, the source germplasm used as a maternal parent and the environmental conditions for induction may also influence haploid induction and these aspects have not been examined in tropical maize so far. The objectives of our study were to (i) monitor the variation for haploid induction rate (HIR) among diverse source germplasm in tropical maize, (ii) determine the relative importance of general (GCA) and specific (SCA) combining abilities for HIR, and (iii) investigate the influence of summer and winter seasons and genotype × season interactions on this trait. Ten inbreds were mated in a half diallel design. The resulting 45 F1 single crosses were pollinated with the haploid inducer hybrid RWS × UH400 during the summer 2008 and winter 2009 seasons in a lowland tropical environment in Mexico. HIR of the single crosses averaged over seasons ranged from 2.90 to 9.66% with an overall mean of 6.74%. Mean HIR was significantly (P < 0.01) higher during the winter (7.37%) than summer season (6.11%). Significant (P < 0.01) variation was observed due to GCA effects of parental inbreds of single crosses but not for SCA, GCA × season and SCA × season interactions. Our study underpins that a higher HIR in tropical maize can be obtained by selecting appropriate source germplasm and undertaking pollination under favorable environmental conditions.
536			_aGlobal Maize Program|Research and Partnership Program
546			_aText in English
591			_aCIMMYT Informa No. 1761|Springer
594			_aINT1888|INT2869
650		7	_aHaploidy _2AGROVOC _91925
650		7	_aTropical zones _2AGROVOC _94259
650		7	_aGermplasm _2AGROVOC _91136
650		7	_aDiallel analysis _2AGROVOC _94687
650		7	_aCombining ability _2AGROVOC _92367
650		7	_aSeasons _2AGROVOC _911384
650		7	_aMaize _2AGROVOC _91173
700	1		_aDhillon, B.S. _92240
700	1		_aSchipprack, W. _93374
700	1		_91436 _aAraus, J.L.
700	1		_aBanziger, M. _gResearch & Partnership Program _gExcellence in Breeding _8INT1888 _9834
700	1		_9869 _aFentaye Kassa Semagn _gGlobal Maize Program _8INT2869
700	1		_91935 _aAlvarado Beltrán, G. _8N1202289 _gGenetic Resources Program
700	1		_aMelchinger, A.E. _93373
773	0		_tEuphytica _gv. 180, no. 2, p. 219-226 _wG444298 _dDordrecht (Netherlands) : Springer, 2011. _x0014-2336
856	4		_yAccess only for CIMMYT Staff _uhttps://hdl.handle.net/20.500.12665/876
942			_cJA _2ddc _n0
999			_c28586 _d28586