000 02775nam a22003977a 4500
001 64977
003 MX-TxCIM
005 20170719154847.0
008 121211s ||||f| 0 p|p||0|| |
020 _a92-9146-025-7
040 _aMX-TxCIM
072 0 _aF30
082 0 4 _a633.15
_bEAS No. 5
100 1 _aOmbakho, G.
_uMaize Productivity Gains through Research and Technology Dissemination. Proceedings of the Eastern and Southern Africa Regional Maize Conference, 5; Arusha (Tanzania); 3-7 Jun 1996
110 2 _aCentro Internacional de Mejoramiento de Maiz y Trigo (CIMMYT), Mexico DF (Mexico)
245 0 0 _aThe influence of stability and adaptability to small-holder farmers preference for maize cultivar
260 _aAddis Ababa (Ethiopia)
_bCIMMYT :
_c1997
340 _aPrinted
520 _aEleven elite maize (Zea Mays L.) cultivars, consisting of two commercial and nine promising hybrids, which had been evaluated for three consecutive years in the National Performance Trials, during 1991 through 1993 giving a total of 21 environments, were subjected to a stability analysis. The objectives were to assess their relative performance, examine adaptability and stability for gain yield, and compare them with farmer preference to a particular maize hybrid in Kenya. The combined analysis of variance revealed genotypes, environments and the interaction among genotypes and environments to be highly significant. An experimental hybrid significantly better than on of the two commercial hybrids, while two other experimental hybrids were significantly better than one of the commercial hybrids. Estimates of parameters that describe stability of performance over environments indicated that all the genotypes were stable. However, the regression coefficient of cultivar means on environmental index indicated commercial hybrid 614D, a popular cultivar with small-holder farmers, as specifically adapted to low yielding environments. In intensive small-holder cropping systems, not only is stability of paramount importance but also some level of adaptation to low input conditions such as low fertility, moisture stress, late planting and weed competition, is essential.
546 _aEnglish
591 _a9712|AGRIS 9702
593 _aJose Juan Caballero
595 _aCPC
650 1 0 _aAdaptation
650 1 0 _aCropping systems
_91068
650 1 0 _aGenetic stability
_91128
650 1 0 _aSmall farms
_91260
653 0 _aCIMMYT
650 1 0 _91314
_aZea mays
_gAGROVOC
650 1 0 _91151
_aHybrids
_gAGROVOC
700 1 _aChumo, J.,
_ecoaut.
700 1 _aLigeyo, D.,
_ecoaut.
700 1 _aOchieng, J.,
_ecoaut.
700 1 _aRansom, J.K.|Palmer, A.F.E.|Zambezi, B.T.|Mduruma, Z.O.|Waddington, S.R.|Pixley, K.V.|Jewell, D.C.
_eeds.
942 _cPRO
999 _c9500
_d9500