Additive main effect and multiplicative interaction model for a diallel-cross analysis |
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Authors: | R Ortiz S Madsen W W Wagoire J Hill S Chandra O Stølen |
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Institution: | (1) International Crops Research Institute for the Semi-Arid Tropics, Patancheru, 502 324 AP, India e-mail: r.ortiz@cgiar.org Fax: +91 40 3241239, IN;(2) The Royal Veterinary and Agricultural University, 40 Thorvaldsensvej, DK-1871 Frederiksberg C, Copenhagen, Denmark, DK |
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Abstract: | Diallel mating designs have proved informative in determining the inheritance of quantitative traits of interest to plant
breeders. Apart from the well-established analyses of a complete diallel, the two-way factorial data structure of this design
lends itself to analysis by the additive-main-effects-and-multiplicative-interaction (AMMI) model. This research article describes
the joint application of the AMMI model and Griffing’s method 1, model I, to gain insight into the breeding value of inbred
lines in a self-pollinated crop such as disomic, hexaploid bread wheat. Data from a multi-environment trial of a complete
diallel cross between eight lines adapted to the East African highlands were analyzed to provide an example of this joint
analysis. This combined approach identified not only the direction of a cross, i.e. which parent should be male or female,
but also which crosses produce offspring showing F1 heterosis.
Received: 10 June 2000 / Accepted: 31 July 2000 |
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Keywords: | AMMI Combining ability Diallel mating design Parent selection |
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