Please use this identifier to cite or link to this item:
https://hdl.handle.net/2440/139319
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Type: | Journal article |
Title: | Non-invasive assessment of cultivar and sex of Cannabis sativa L. by means of hyperspectral measurement |
Author: | Matros, A. Menz, P. Gill, A. Santoscoy, A. Dawson, T. Seiffert, U. Burton, R. |
Citation: | Plant-Environment Interactions, 2023; 4(5):258-274 |
Publisher: | Wiley |
Issue Date: | 2023 |
ISSN: | 2575-6265 2575-6265 |
Statement of Responsibility: | Andrea Matros, Patrick Menz, Alison R. Gill, Armando Santoscoy, Tim Dawson, Udo Seiffert, Rachel A. Burton |
Abstract: | Cannabis sativa L. is a versatile crop attracting increasing attention for food, fiber, and medical uses. As a dioecious species, males and females are visually indistinguishable during early growth. For seed or cannabinoid production, a higher number of female plants is economically advantageous. Currently, sex determination is labor-intensive and costly. Instead, we used rapid and non-destructive hyperspectral measurement, an emerging means of assessing plant physiological status, to reliably differentiate males and females. One industrial hemp (low tetrahydrocannabinol [THC]) cultivar was pre-grown in trays before transfer to the field in control soil. Reflectance spectra were acquired from leaves during flowering and machine learning algorithms applied allowed sex classification, which was best using a radial basis function (RBF) network. Eight industrial hemp (low THC) cultivars were field grown on fertilized and control soil. Reflectance spectra were acquired from leaves at early development when the plants of all cultivars had developed between four and six leaf pairs and in three cases only flower buds were visible (start of flowering). Machine learning algorithms were applied, allowing sex classification, differentiation of cultivars and fertilizer regime, again with best results for RBF networks. Differentiating nutrient status and varietal identity is feasible with high prediction accuracy. Sex classification was error-free at flowering but less accurate (between 60% and 87%) when using spectra from leaves at early growth stages. This was influenced by both cultivar and soil conditions, reflecting developmental differences between cultivars related to nutritional status. Hyperspectral measurement combined with machine learning algorithms is valuable for non-invasive assessment of C. sativa cultivar and sex. This approach c an potentially improve regulatory security and productivity of cannabis farming. |
Keywords: | cannabis; cultivar; industrial hemp; machine learning; prediction; sex; spectral measurement |
Description: | First published: 17 August 2023 |
Rights: | © 2023 The Authors. Plant-Environment Interactions published by New Phytologist Foundation and John Wiley & Sons Ltd. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
DOI: | 10.1002/pei3.10116 |
Grant ID: | http://purl.org/au-research/grants/arc/CE140100008 http://purl.org/au-research/grants/arc/CE0561495 |
Published version: | http://dx.doi.org/10.1002/pei3.10116 |
Appears in Collections: | Agriculture, Food and Wine publications |
Files in This Item:
File | Description | Size | Format | |
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hdl_139319.pdf | Published version | 6.13 MB | Adobe PDF | View/Open |
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