000 02643nam a22003977a 4500
001 G78720
003 MX-TxCIM
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040 _aMX-TxCIM
072 0 _aE16
072 0 _aE16
082 0 4 _a631.53
_bBOO
100 1 _aIninda, J.
_uBook of abstracts: Arnel R. Hallauer international symposium on plant breeding
110 0 _aCentro Internacional de Mejoramiento de Maiz y Trigo (CIMMYT), Mexico DF (Mexico)
111 2 _aArnel R. Hallauer International Symposium on Plant Breeding
_cMexico, D.F. (Mexico)
_d17-22 Aug 2003
245 0 0 _aCategorizing inbreds derived from related backgrounds for combining ability and other agronomic traits
260 _aMexico, DF (Mexico)
_bCIMMYT :
_c2003
300 _ap. 273
340 _aPrinted
520 _aSeventy-nine inbred lines derived from related sources DC58, DC31, and DC96 were crossed to three inbred line testers CML202, CML204, and CML206. The objective of this experiment was to identify lines of opposite heterotic groups for use in the development of hybrids. Experiments were planted in three locations and two replications in Kenya in 2001. A selection index was apphed on the single crosses for grain yield, maturity, anthesis-silking interval, ear height, husk cover, ear rot, gray leaf spot, and turcicum blight. The results of the selection index and the general and specific combining ability (GCA and SCA respectively) effects were used to predict the potential use of particu1ar inbred lines in single, three-way or double cross hybrid combinations. No clear-cut pattem for combining ability was observed from lines in any particular background.Inbred line 347-2-2 had particularly high GCA, while line 244-2-1 had a high SCA with CML206. The combined results of the selection index and SCA effects identified lines that indicate potential top performance in a single cross hybrid combination. The best single cross was predicted to be line 244-2-1 x line 249-1-4. An additional six lines with high GCA effects (302-1-2,326-2-2, 340-3-2,348-1-2, S2-348-1-3, and 348-3-2) were identified to be of value in the development of a synthetic.
546 _aEnglish
591 _a0309|AGRIS 0301|AL-Maize Program
593 _aJuan Carlos Mendieta
595 _aCPC
650 1 0 _aCrossbreeding
650 1 0 _aExperimentation
650 1 0 _aGrain yield
_91339
650 1 0 _aHeterotis
650 1 7 _aInbred lines
_gAGROVOC
_2
_91155
650 1 0 _aKenya
_91167
650 1 0 _aPlant developmental stages
650 1 7 _aGenetic resources
_gAGROVOC
_2
_91127
650 1 0 _91151
_aHybrids
_gAGROVOC
942 _cPRO
999 _c7020
_d7020