Additive Main Effects and Multiplicative Interaction Analysis of Two International Maize Cultivar Trials

Crossa, J. and Gauch Jr, H.G. and Zobel, R.W. (1990) Additive Main Effects and Multiplicative Interaction Analysis of Two International Maize Cultivar Trials. Crop Science, 30 (3). pp. 493-500.

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Abstract

The methodology used by the International Maize and Wheat ImprovemenCt enter (CIMMYTto) develop and improvei ts maize (Zea mays L.) germplasmin volves evaluation of families or experimental varieties in extensive international testing trials. The genotype- environmenitn teraction is producedb y differential genotypic responsest o variede nvironmentacol nditions. Its effect is to limit the accuracyo f yield estimatesa ndc omplicatet he identification of specific genotypesf or specific environmentsT.h e objective of this study was to use the Additive Main effects and Multiplicative Interaction (AMMmI) ethod,w ith additive effects for genotypesa nd environmentasn dm ultiplicative terms for genotype-environmeinn-t teraction, for analyzing data from two international maize caltivar trials. Results from the first trial were: (i) predictive assessment selected AMMwIi th one principal componenatx is, (ii) AMMinI - creased the precision of yield estimates equivalent to increasing the numbero f replications by a factor of 4.30, (iii) AMMpIr ovided muchi nsight into genotype-environmenitn teractions, and (iv) AMMseIl ected a different highest-yieldingg enotyp’et han did treatmentm eansi n 72%o f the environmentsR. esults for the secondt rial weret hat predictive assessments elects the AMMwIi th none of the principal componenatx es, whichi ncreasedp recision equivalentt o increaset he numbeorf replications by a factor of 2.59.

Item Type: Article
Additional Information: Dr S N Nigam Collection - Box No. 20
Author Affiliation: Biometrics and Statistics Unit, CIMMYT, Mexico
Subjects: Crop Improvement
Divisions: Maize
Depositing User: Mr Siva Shankar
Date Deposited: 15 Mar 2013 11:17
Last Modified: 15 Mar 2013 11:17
Official URL: http://dx.doi.org/10.2135/cropsci1990.0011183X0030...
URI: http://eprints.icrisat.ac.in/id/eprint/9873

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