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Stratification of maize test-sites in botswana in relation to selected sites within the Sadc region based on yield performance

By: Centro Internacional de Mejoramiento de Maiz y Trigo (CIMMYT) Kenya | Setimela, P.S.
Contributor(s): Friesen, D.K.|Palmer, A.F.E | Lekgari, L [coaut.] | Makore, J [coaut.] | Banziger, M [coaut.].
Material type: materialTypeLabelBookAnalytics: Show analyticsPublisher: Nairobi (Kenya) KARI|CIMMYT : 2002Description: p. 263-267.ISBN: 970-648-120-6.Subject(s): Analytical methods | Botswana | Experimentation | Maize | Rainfed farming | Testing | Yield factors | CIMMYT | KARI | Zea mays AGROVOC | Genotypes AGROVOC | Plant breeding AGROVOCSummary: Stratification of maize test-sites in Botswana was done to identify key benchmark testing sites similar to testing sites in the SADC region.. Grain yield from 31 testing sites across 3 years were compared with four test-sites in Botswana. Sequential retrospective (Seqret) pattern analysis methodology was used to stratify the test-sites according to their similarity and dissimilarity based on genotype yield. Seqret pattern analysis methodology uses historical data, taking into account complicated imbalances of data caused by change over the years and loss of whole locations and genotypes in some years. Analysis of cumulative data from 1998/99-2000/2001 seasons captured the major patterns of similarities among test- sites by clustering 25 retained sites into 4 clusters with an overall R2 = 0.61. The test-sites in Botswana clustered into one of the four clusters, which captured some of the major similarities. The results obtained from this data set will be useful in restricting few testing sites in the future.Collection: CIMMYT Staff Publications Collection
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Conference proceedings CIMMYT Knowledge Center: John Woolston Library

Lic. Jose Juan Caballero Flores

 

CIMMYT Staff Publications Collection CIS-4183 (Browse shelf) 1 Available 630224
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Stratification of maize test-sites in Botswana was done to identify key benchmark testing sites similar to testing sites in the SADC region.. Grain yield from 31 testing sites across 3 years were compared with four test-sites in Botswana. Sequential retrospective (Seqret) pattern analysis methodology was used to stratify the test-sites according to their similarity and dissimilarity based on genotype yield. Seqret pattern analysis methodology uses historical data, taking into account complicated imbalances of data caused by change over the years and loss of whole locations and genotypes in some years. Analysis of cumulative data from 1998/99-2000/2001 seasons captured the major patterns of similarities among test- sites by clustering 25 retained sites into 4 clusters with an overall R2 = 0.61. The test-sites in Botswana clustered into one of the four clusters, which captured some of the major similarities. The results obtained from this data set will be useful in restricting few testing sites in the future.

Global Maize Program|Research and Partnership Program

English

0409|AGRIS 0401|AL-Maize Program

Juan Carlos Mendieta

INT1888|INT2636

CIMMYT Staff Publications Collection

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