000			03095nab a22004217a 4500
001			G96065
003			MX-TxCIM
005			20230710215242.0
008			211110s2012 ne |||p|op||| 00| 0 eng d
022			_a1573-5060 (Onlinee)
022	0		_a0014-2336
024	8		_ahttps://doi.org/10.1007/s10681-012-0626-z
040			_aMX-TxCIM
041			_aeng
090			_aCIS-6619
100	1		_aPrigge, V. _924871
245	1	0	_aDoubled haploids in tropical maize : _bII. Quantitative genetic parameters for testcross performance
260			_aDordrecht (Netherlands) : _bSpringer, _c2012.
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			_aSingle crosses (SC) of elite inbreds and open-pollinated populations (OP) are suitable source germplasm for doubled haploid (DH) line development in hybrid maize breeding, given that they combine a high population mean ([`(x)]x) for testcross performance with adequate response to selection ( \Updelta G Unknown control sequence '\Updelta'). This is the first study reporting testcross grain yield (TCGY) and dry matter content (TCDMC) evaluations of 131 DH lines developed from ten tropical source germplasm comprising five OP (OP1?OP5) and five SC (SC1?SC5). Gene diversity (d) and the average number of alleles (a r ) per locus was estimated for DH lines based on 24 simple sequence repeat markers. Analysis across three environments revealed no significant differences between [`(x)]xof OP- and SC-derived DH lines for TCGY and TCDMC. Significant genetic variance for both traits was only detected among OP-derived DH lines which may be explained by a larger number of segregating quantitative trait loci (QTL) as suggested by higher d and a r values than in SC-derived DH lines. The usefulness criterion ( U = [`(x)] + \Updelta G Unknown control sequence '\Updelta') was higher for OP-derived DH lines for TCDMC, but higher for SC-derived DH lines for TCGY. DH lines from OP1, OP2, and OP3 showed high TCGY, suggesting that they may be useful in tropical hybrid breeding. We conclude that tropical OP represent a valuable source of untapped genetic variation that can efficiently be exploited with DH technology for hybrid maize breeding.
536			_aGlobal Maize Program
546			_aText in English
591			_aCIMMYT Informa No. 1781|Springer
594			_aINT2825|INT2925
595			_aCSC
650		7	_aHaploidy _2AGROVOC _91925
650		7	_aMaize _2AGROVOC _91173
650		7	_aTropical zones _2AGROVOC _94259
700	1		_9875 _aBABU, R. _gGlobal Maize Program _8INT2925
700	1		_aDas, B. _gGlobal Maize Program _gExcellence in Breeding _8INT2825 _9863
700	1		_aHernández Rodríguez, V.M. _9115
700	1		_92252 _aAtlin, G.N.
700	1		_aMelchinger, A.E. _93373
773	0		_tEuphytica _gv. 185, no. 3, p. 453-463 _wG444298 _x0014-2336 _dDordrecht (Netherlands) : Springer, 2012.
856	4		_uhttps://hdl.handle.net/20.500.12665/869 _yAccess only for CIMMYT Staff
942			_cJA _2ddc _n0
999			_c28878 _d28878