Interpretation of genotype × year interaction in rainfed durum wheat under moderate cold conditions of Iran. Issue 1 (2nd January 2017)

• Record Type: Journal Article
• Authors: Mohammadi, Reza
• Is Part Of: New Zealand journal of crop and horticultural science. Volume 45:Issue 1(2017)
• Page Start: 55
• Page End: 74
• Publication Date: 2017-01-02
• Subjects: AMMI analysis -- climatic and genotypic co-variables -- cross-over interaction -- durum wheat -- G×Y interactions -- stability types; Crops -- New Zealand -- Periodicals; Horticulture -- New Zealand -- Periodicals; Crops -- Periodicals; Horticulture -- Periodicals; Crops; Horticulture; New Zealand; Periodicals; 633.09905
• DOI: 10.1080/01140671.2016.1231126
• Languages: English
• ISSNs: 1175-8783

Abstract

ABSTRACT: A multi-year trial was conducted to compare the effects of genotype, year and genotype × year (G×Y) interactions for grain yield and several drought-adaptive traits of 25 wheat genotypes during five seasons (2005–2010). Four conventional stability statistics, covering a wide range of stability concepts (Types 1–4), and the additive main effect and multiplicative interaction (AMMI) model were applied to analyse G×Y interaction and to investigate the causes of G×Y interaction in rainfed durum wheat. For all the traits, the largest sum of squares (SS) was accounted for by the year, followed by G×Y interaction and genotype effects. Most of the G×Y interaction (73.4%–90.6% of total G×Y interaction) was of crossover type, which would complicate the development of genotypes with stable performance. Partitioning SS due to G×Y interaction for genotypes indicated that the breeding lines were the smallest contributors to crossover G×Y interactions. The results indicated that the freezing days and earliness were among the climatic and genotypic co-variables, respectively, that contributed most to the G×Y interaction in rainfed durum wheat.