The use of the AMMI model and AMMI stability value to describe genotype x environment interaction and yield stability in winter wheat (Triticum aestivum L.)
Material type:
TextPublication details: Addis Ababa (Ethiopia) CIMMYT : 1999ISBN: - 92-9146-058-3
| Item type | Current library | Collection | Call number | Copy number | Status | Date due | Barcode | Item holds | |
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| Conference proceedings | CIMMYT Knowledge Center: John Woolston Library | CIMMYT Publications Collection | Look under series title (Browse shelf(Opens below)) | 1 | Available | 1Z629146 |
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| Look under series title Perspectives and advances in wheat breeding in South Africa | Look under series title Hybrid wheat in Africa | Look under series title Genotype x environment interaction of wheat genotypes selected for adaptation to summer, rainfed conditions in Zimbabwe | Look under series title The use of the AMMI model and AMMI stability value to describe genotype x environment interaction and yield stability in winter wheat (Triticum aestivum L.) | Look under series title Bread wheat grain yield genotype by environmental interaction in North-Western Ethiopia | Look under series title Agronomic performance and stability of bread wheat genotypes in the national yield trial of Ethiopia | Look under series title The frequency distribution of industrial quality traits in selected populations of wheat |
Thirteen winter and intermediate type bread wheat cultivars were evaluated under dryland conditions over a four year period from 1991 to 1994 and over a total of 120 environments in the Free State province of South Africa. The objectives were to determine the suitability of the AMMI model in describing genotype-environment (G x E) interaction, as well as to assess the yield stability of the wide range of genotypes grown under dryland conditions in the Free State province. In all three relatively homogeneous production regions, viz. Western, Central and Eastern Free State, the AMMI model identified distinct patterns of adaptation. The hybrids and long growth period cultivars are generally better adapted to high yield-potentia1 conditions, while the short and medium growth period pure line cultivars are better adapted to lower yield-potential conditions. Since the AMMI model per se does not provide a stability value, the AMMI stability value (ASV) was developed, using the relative IPCA1 en IPCA2 scores, to determine the stability of each genotype across environments. The determination of the ASV has proved most useful in an environment as variable as that in the Free State province.
English
0007|AGRIS 0101|AL-Wheat Program
Jose Juan Caballero
CIMMYT Publications Collection