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Responses of Total Biomass, Shoot Dry Weight, Yield and Yield Components of Jerusalem Artichoke (Helianthus tuberosus L.) Varieties under Different Terminal Drought Duration

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Department of Agronomy, Faculty of Agriculture, Khon Kaen University, Khon Kaen 40002, Thailand
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Peanut, Jerusalem Artichoke, and Cassava Improvement Research Group, Khon Kaen University, Khon Kaen 40002, Thailand
3
USDA-ARS, Crop Genetics and Breeding Research Unit, 115 Coastal Way, Tifton, GA 31793, USA
4
Crop & Soil Sciences, National Environmentally Sound Production Agriculture Laboratory (NESPAL), The University of Georgia, Tifton, GA 31793, USA
*
Author to whom correspondence should be addressed.
Agriculture 2020, 10(6), 198; https://doi.org/10.3390/agriculture10060198
Received: 20 April 2020 / Revised: 22 May 2020 / Accepted: 26 May 2020 / Published: 2 June 2020
(This article belongs to the Section Crop Production)
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 experiment 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, whereas 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 and generated progeny population for improvement of new varieties with high yield potential and low yield reduction for growing in terminal drought-prone environments. View Full-Text
Keywords: high yield potential; low yield reduction; economic yield; harvest index; drip irrigation; field capacity; soil moisture content high yield potential; low yield reduction; economic yield; harvest index; drip irrigation; field capacity; soil moisture content
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Chaimala, A.; Jogloy, S.; Vorasoot, N.; Toomsan, B.; Jongrungklang, N.; Kesmala, T.; Holbrook, C.C.; Kvien, C.K. Responses of Total Biomass, Shoot Dry Weight, Yield and Yield Components of Jerusalem Artichoke (Helianthus tuberosus L.) Varieties under Different Terminal Drought Duration. Agriculture 2020, 10, 198.

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