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ARS Home » Southeast Area » Tifton, Georgia » Crop Genetics and Breeding Research » Research » Publications at this Location » Publication #377638
Research Project: Development of High-Yielding, High-Oleic Peanut Cultivars or Germplasm with Tolerance to Biotic and Abiotic Stresses

Location: Crop Genetics and Breeding Research

Title: Responses of total biomass, shoot dry weight, yield and yield components of Jerusalem artichoke (Helianthus tuberosus L.) varieties under different terminal drought duration

Author
item CHAIMALA, A - Khon Kaen University
item JOGLOY, S - Khon Kaen University
item VORASOOT, N - Khon Kaen University
item TOOMSAN, B - Khon Kaen University
item JONGRUNGKLANG, N - Khon Kaen University
item KESMALA, T - Khon Kaen University
item Holbrook, Carl - Corley
item KVIEN, C - Khon Kaen University

Submitted to: Agriculture
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 5/26/2020
Publication Date: 6/2/2020
Citation: Chaimala, A., Jogloy, S., Vorasoot, N., Toomsan, B., Jongrungklang, N., Kesmala, T., Holbrook Jr, C.C., Kvien, C. 2020. Responses of total biomass, shoot dry weight, yield and yield components of Jerusalem artichoke (Helianthus tuberosus L.) varieties under different terminal drought duration. Agriculture. 10(6), 198. https://doi.org/10.3390/agriculture10060198.
DOI: https://doi.org/10.3390/agriculture10060198

Interpretive Summary: Late season drought stress is a major constraint of Jerusalem artichoke production in non irrigated areas in the tropics. This study was conducted to estimate the effects of different durations of terminal drought on total biomass, tuber yield, harvest index, and yield components, and to identify high yield potential and low yield reduction genotypes for use in varietal improvement programs. Three genotypes were identified that had high yield potential under non stressed conditions, but they had high yield reduction under drought conditions. Two other genotypes were identified that had low yield potential and low yield reduction. It might be possible to cross these two types of genotypes and select progeny that have high yield potential and low yield reduction under late season drought stress.

Technical Abstract: As a secondary crop planting in the double-cropping system, terminal drought is the major constraint of Jerusalem artichoke production in the rainfed area. This study aims to estimate the effects of different durations of terminal drought on total biomass, tuber yields, harvest index, yield components, and to identify high yield potential and low yield reduction genotypes for the varietal improvement program. A split-plot design with four replications was conducted under field experiments for two years. Three drought durations including non-drought stress (SD0), drought from 60 and 45 days after transplanting until harvest (SD1 and SD2, respectively), were assigned in main plots and six genotypes were arranged in subplots. Crop parameters were greater decreased under a long-drought duration than under short-drought duration. The genotypes were identified: HEL256, JA37 and JA125 had high yield potential under SD0 conditions, wheras there was high yield reduction under drought conditions. In contrast, JA60 and HEL253 were identified as low yield potential and low yield reduction genotypes. This information suggested that high yield potential genotypes and low yield reduction genotypes should be selected to generate progeny populations for improvement of new varieties with high yield potential and low yield reduction for growing in terminal drought-prone environments.