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Stratification of sorghum hybrid testing sites in southern Africa based on grain yield

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Relation http://oar.icrisat.org/727/
 
Title Stratification of sorghum hybrid testing sites in southern Africa based on grain yield
 
Creator Mgonja, M A
Chandra, S
Obilana, A B
Monyo, E S
Kudita, S
Chisi, M
Saadan, H M
Chinhema, E
 
Subject Sorghum
 
Description Sequential retrospective (SeqRet) pattern analysis technique was applied to classify sorghum hybrid testing sites in accordance with their similarity for yield differentiation among genotypes. Historical grain yield data from 150 multi-environment trials (METs) conducted at 23 sites in the Southern Africa Development Community (SADC) region during 1987/1988-1992/1993 was used. The sites were clustered into six major environment groups in the SADC region with a model fit of R2=68%. Analysis of these 6 years' data together with additional data from 1999/2000 stratified the 23 sites in the same six major groups (R2=69%), the additional five sites in 1999/2000 classified with appropriate site groups. These results suggest that future sorghum hybrid testing could be cost-effectively conducted in a few representative sites selected from within each of the six identified site groups.
 
Publisher Elsevier
 
Date 2008
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Rights —
 
Identifier http://oar.icrisat.org/727/1/FCR108%283%29193-197_2008.pdf
Mgonja, M A and Chandra, S and Obilana, A B and Monyo, E S and Kudita, S and Chisi, M and Saadan, H M and Chinhema, E (2008) Stratification of sorghum hybrid testing sites in southern Africa based on grain yield. Field Crops Research, 108 (3). pp. 193-197.