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The Relationship Between Bulb Yield and Allicin Concentration in Garlic Varieties †

School of Agriculture and Food Sciences, The University of Queensland, Gatton, QLD 4343, Australia
Centre for Nutrition and Food Sciences, Queensland Alliance for Agriculture and Food Innovation, The University of Queensland, Coopers Plains, QLD 4108, Australia
Queensland Department of Agriculture and Fisheries, Gatton, QLD 4343, Australia
Author to whom correspondence should be addressed.
Presented at the third International Tropical Agriculture Conference (TROPAG 2019), Brisbane, Australia, 11–13 November 2019.
Proceedings 2019, 36(1), 28;
Published: 31 December 2019
(This article belongs to the Proceedings of The Third International Tropical Agriculture Conference (TROPAG 2019))


Garlic (Allium sativum L.) is used as a vegetable and medicinal plant. It is a rich source of organosulfur compounds, in particular allicin, which contributes to the flavour and health benefits. Although worldwide garlic production is increasing, demand continues to outstrip supply. Improving the yield of garlic will address the increasing demand, while increasing allicin concentration will improve its potential health benefits and flavour. It is unknown if increasing garlic bulb size (yield) has a negative effect on allicin concentration of garlic. Therefore, a fundamental understanding of the relationship between yield and allicin concentration is required. A field experiment was conducted at Gatton (QLD, Australia) with 32 varieties, of which 29 varieties were sourced from World Vegetable Centre and 3 varieties from existing Queensland sub-tropical varieties. The garlic cloves were planted in March 2018 with 4 replicates in a randomised complete block design and harvested when garlic had 70% senescence. Varieties showed large variation in bulb size, ranging from about 35 to 120 g, with fresh yield ranging from about 5.5 to 16 t/ha. The allicin concentration ranged from 3.5 to 6.6 mg g−1 fresh weight (FW) between varieties and more than 50% of varieties were under the minimum pharmaceutical standard for allicin concentration (>4.5 mg g−1 in FW). Across varieties there was an inverse relationship between yield and allicin concentration. However, there were some varieties which had both high allicin concentration and yield. Current field trials investigate the effect of agronomic practices on yield and allicin concentration in garlic varieties.
Keywords: garlic; varieties; yield; allicin garlic; varieties; yield; allicin

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MDPI and ACS Style

Nguyen, B.; Wehr, B.; O’Hare, T.; Hong, H.; Menzies, N.; Harper, S. The Relationship Between Bulb Yield and Allicin Concentration in Garlic Varieties. Proceedings 2019, 36, 28.

AMA Style

Nguyen B, Wehr B, O’Hare T, Hong H, Menzies N, Harper S. The Relationship Between Bulb Yield and Allicin Concentration in Garlic Varieties. Proceedings. 2019; 36(1):28.

Chicago/Turabian Style

Nguyen, Binh, Bernhard Wehr, Timothy O’Hare, Hung Hong, Neal Menzies, and Stephen Harper. 2019. "The Relationship Between Bulb Yield and Allicin Concentration in Garlic Varieties" Proceedings 36, no. 1: 28.

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