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Genotypic variability and genotype by environment interactions for inulin content of Jerusalem artichoke germplasm
- Puttha, Ratchanee, Jogloy, Sanun, Wangsomnuk, Preeya P., Srijaranai, Supalax, Kesmala, Thawan, Patanothai, Aran
- Euphytica 2012 v.183 no.1 pp. 119-131
- germplasm, genotype-environment interaction, genotype, harvest index, genetic variation, inulin, biomass, Jerusalem artichokes
- Genetic variations in germplasm and genotype × environment interaction (G × E) are important for crop improvement. The objectives were to explore genetic variation in Jerusalem artichoke germplasm and to evaluate G × E interaction for inulin content. Seventy-nine accessions of Jerusalem artichoke were evaluated in a randomized complete block design with two replications for three seasons. Significant variation in inulin content (55.3–74.0% dry weight) was observed and the genotypes with high inulin content could be identified although there was intermediate G × E interaction. Genotypes were also significantly different for days to maturity, fresh tuber yield, biomass and harvest index and G × E interactions for these traits were also significant. The correlation between inulin content and days to maturity was not significant (r = −0.20), whereas inulin content and fresh tuber yield were significantly associated (r = 0.22). JA 37 and CN 52867 are promising for high yield and inulin content.