Full TGIF Record # 70827
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Publication Type:
Content Type:Abstract or Summary only
Author(s):Ebdon, J. S.; Gauch, H. G. Jr.
Author Affiliation:Ebdon: University of Massachusetts; and Gauch, Jr.: Cornell University
Title:AMMI analysis and interpretation of genotype by environment interaction in national turfgrass performance trials
Section:Turfgrass science
Other records with the "Turfgrass science" Section
Meeting Info.:Minneapolis, MN: November 5-9, 2000
Source:2000 Annual Meeting Abstracts [ASA/CSSA/SSSA]. 2000, p. 151.
# of Pages:1
Publishing Information:[Madison, WI]: American Society of Agronomy, Crop Science Society of America, Soil Science Society of America
Keywords:TIC Keywords: Analytical methods; Genotypes; Environment; National Turfgrass Evaluation Program; Lolium perenne; Poa pratensis; Models; Genotype environment interaction
Abstract/Contents:"The additive main effect and multiplicative interaction (AMMI) analysis has been shown to be effective in understanding complex genotype-environment (GE) interactions typical of National Turfgrass Evaluation Program (NTEP) variety trials. Interactions cause changes in genotype ranking between locations and are problematic for turfgrass breeders and agronomist [agronomists]. AMMI was used to analyze the interaction between (i) 123 perennial ryegrass (PRG) genotypes and 60 location-year combinations (environments), and (ii) 125 Kentucky bluegrass (KBG) genotypes and 69 location-year combinations. AMMI estimates for turfgrass quality (1 to 9 rating scale) were more predictively accurate than the NTEP raw data (means averaged over replicates) based on model validation results. The statistical efficiency and accuracy gain using AMMI was equivalent to the precision gained by increasing the number of replications from 3 to 6 (KBG) and from 3 to 17 (PRG). Rank difference between AMMI adjusted means and the raw data for some genotypes and locations were as large as 104 (KBG) and 111 (PRG). Biological interpretation of GE interactions will be discussed."
Note:This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Ebdon, J. S., and H. G. Jr. Gauch. 2000. AMMI analysis and interpretation of genotype by environment interaction in national turfgrass performance trials. Annu. Meet. Abstr. p. 151.
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