000 02392nam a22004457a 4500
001 78627
003 MX-TxCIM
005 20170719154751.0
008 121211s ||||f| 0 p|p||0|| |
020 _a970-648-106-0
040 _aMX-TxCIM
072 0 _aE16
072 0 _aF30
090 _aCIS-3866
100 1 _aAbdurehman, 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, DF (Mexico)
_d17-22 Aug 2003
_9990
245 0 0 _aHeterosis and combining ability for yield and related traits in maize
260 _aMexico, DF (Mexico)
_bCIMMYT :
_c2003
300 _ap. 256-257
340 _aPrinted
520 _aAmongst cereals in Ethiopia, maize (Zea mays L.) ranks first in terms of total production and grain yield (CSA l997). Despite its importance, the national average for maize yield was low (only l.7 t/ha). This was attributed to several production constraints, including the lack of improved maize varieties (Abera 1982). After the release of improved open pollinating and hybrid varieties, the national average yield increased to 1.93 t/ha. Due to an increasing interest in hybrid maize production, the national maize research program began various activities related to hybrid development, including the determination of heterotic patterns and combining ability amongst different maize germplasms, and the identification of the most desirable crosses for exploiting heterosis. Heterosis receives considerable attention because of its marked effects on grain yield improvement. The amount of heterosis depends largely upon the genetic divergence of the parental materials (Hallauer and Miranda 1988).
546 _aEnglish
591 _a0311|AGRIS 0301|AL-Maize Program
593 _aJuan Carlos Mendieta
595 _aCSC
650 1 0 _aCrossbreeding
650 1 0 _aGermplasm
_91136
650 1 0 _aGrain yield
_91339
650 1 0 _aInbred lines
_91155
650 1 0 _aMaize
_91173
650 1 0 _aPollination
650 1 0 _91314
_aZea mays
_gAGROVOC
650 1 0 _91134
_aGenotypes
_gAGROVOC
650 1 0 _91151
_aHybrids
_gAGROVOC
650 1 0 _91203
_aPlant breeding
_gAGROVOC
700 1 _aGupta, V.P.,
_ecoaut.
700 1 _aZelleke, H.,
_ecoaut.
942 _cPRO
999 _c6935
_d6935