Evaluation of maize hybrids for yield and stability in Botswana
By: Centro Internacional de Mejoramiento de Maiz y Trigo (CIMMYT), Mexico DF (Mexico) | Setimela, P.S
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Contributor(s): Ransom, J.K.|Palmer, A.F.E.|Zambezi, B.T.|Mduruma, Z.O.|Waddington, S.R.|Pixley, K.V.|Jewell, D.C [eds.].
Material type:
BookAnalytics: Show analyticsPublisher: Addis Ababa (Ethiopia) CIMMYT : 1997ISBN: 92-9146-025-7.Subject(s): Botswana | Genetic stability | Varieties | CIMMYT | Zea mays AGROVOC | Yields AGROVOC | Hybrids AGROVOCDDC classification: 633.15 Summary: Fifteen maize (Zea mays L.) hybrids and one open pollinated variety, Kgalagadi Early Pearl (KEP), were evaluated for two seasons at three locations in 1993/94 and 1994/95. The study was undertaken to provide information on yield stability and performance of hybrids in Botswana environments. Genotype x environment (GCS) interactions were analyzed using the additive main effects and multiplicative interaction (AMMI) with principal components analysis (IPCA 1). They were significant (p<0.01) for days to 50 % silking, days to 50 % anthesis, anthesis silking interval (ASI) and plant height, but not for grain yield. Hybrids PHB 3427, PHB 3435, CRN 3839, CRN 4141 and CRN 4523 were significantly, higher in yield (p<0.01) than KEP. Number of days to 50% silking (r = -0.785) and days to 50% anthesis (r=-0.776) were negatively correlated with grain yield. Plant height was highly and positively correlated with yield (r=0.783). Hybrids with short ASI seemed to perform better compared to those with longer ASI. Environment was found to play a major role in determining the grain yield across seasons and sites but hybrids were consistent across seasons and locations.Collection: CIMMYT Publications Collection
| Item type | Current location | Collection | Call number | Copy number | Status | Date due | Barcode | Item holds |
|---|---|---|---|---|---|---|---|---|
| Conference proceedings |
CIMMYT Knowledge Center: John Woolston Library
Lic. Jose Juan Caballero Flores
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CIMMYT Publications Collection | 633.15 EAS No. 5 (Browse shelf) | 1 | Available | S624172 |
Fifteen maize (Zea mays L.) hybrids and one open pollinated variety, Kgalagadi Early Pearl (KEP), were evaluated for two seasons at three locations in 1993/94 and 1994/95. The study was undertaken to provide information on yield stability and performance of hybrids in Botswana environments. Genotype x environment (GCS) interactions were analyzed using the additive main effects and multiplicative interaction (AMMI) with principal components analysis (IPCA 1). They were significant (p<0.01) for days to 50 % silking, days to 50 % anthesis, anthesis silking interval (ASI) and plant height, but not for grain yield. Hybrids PHB 3427, PHB 3435, CRN 3839, CRN 4141 and CRN 4523 were significantly, higher in yield (p<0.01) than KEP. Number of days to 50% silking (r = -0.785) and days to 50% anthesis (r=-0.776) were negatively correlated with grain yield. Plant height was highly and positively correlated with yield (r=0.783). Hybrids with short ASI seemed to perform better compared to those with longer ASI. Environment was found to play a major role in determining the grain yield across seasons and sites but hybrids were consistent across seasons and locations.
Global Maize Program
English
9712|AGRIS 9702
Jose Juan Caballero
INT2636
CIMMYT Publications Collection
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