Phenotypic diversity of USDA guayule germplasm collection grown under different irrigation conditions

Luo, Zinan; Abdel‐Haleem, Hussein

doi:10.1016/j.indcrop.2019.111867

Cited by 8 publications

(4 citation statements)

References 30 publications

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“…Undeniably, our NIR models seem not as powerful as the ones (R 2 > 0.95) established by previous researchers [2, 4, 6, 18, 38]; however, the previous studies on rubber-producing plants were all based on a limited number of accessions and large numbers of NIR scans, and this technical strategy might lead to overestimation of the stability and accuracy in the prediction of PLSR models. In contrast, our models were based on 56 different accessions representing a USDA guayule germplasm collection and included wild and improved genetic materials that were planted under different growth conditions [19]. Thus, these models could be more representative for general use in predicting guayule resin and rubber.…”

Section: Resultsmentioning

confidence: 99%

“…A total of 49 and 56 guayule accessions (49 were included in 56 accessions) from a USDA germplasm collection were planted under water-stressed and non-stressed field conditions, respectively for 2.5 years with each accession replicated three times [19]. Finally, a total of 315 guayule samples were harvested from water-stressed (147) and non-stressed (168) field plots at Maricopa, Arizona, USA.…”

Section: Methodsmentioning

confidence: 99%

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A high-throughput quantification of resin and rubber contents in Parthenium argentatum using near-infrared (NIR) spectroscopy

2019

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BackgroundGuayule (Parthenium argentatum A. Gray), a plant native to semi-arid regions of northern Mexico and southern Texas in the United States, is an alternative source for natural rubber (NR). Rapid screening tools are needed to replace the current labor-intensive and cost-inefficient method for quantifying rubber and resin contents. Near-infrared (NIR) spectroscopy is a promising technique that simplifies and speeds up the quantification procedure without losing precision. In this study, two spectral instruments were used to rapidly quantify resin and rubber contents in 315 ground samples harvested from a guayule germplasm collection grown under different irrigation conditions at Maricopa, AZ. The effects of eight different pretreatment approaches on improving prediction models using partial least squares regression (PLSR) were investigated and compared. Important characteristic wavelengths that contribute to prominent absorbance peaks were identified.ResultsUsing two different NIR devices, ASD FieldSpec®3 performed better than Polychromix Phazir™ in improving R2 and residual predicative deviation (RPD) values of PLSR models. Compared to the models based on full-range spectra (750–2500 nm), using a subset of wavelengths (1100–2400 nm) with high sensitivity to guayule rubber and resin contents could lead to better prediction accuracy. The prediction power of the models for quantifying resin content was better than rubber content.ConclusionsIn summary, the calibrated PLSR models for resin and rubber contents were successfully developed for a diverse guayule germplasm collection and were applied to roughly screen samples in a low-cost and efficient way. This improved efficiency could enable breeders to rapidly screen large guayule populations to identify cultivars that are high in rubber and resin contents.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

A high-throughput quantification of resin and rubber contents in Parthenium argentatum using near-infrared (NIR) spectroscopy

2019

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“…Recent studies have evaluated the life cycle environmental performance of producing natural rubber from guayule, a shrub native to the southwest U.S., as a substitute for Hevea natural rubbers. Growing guayule in suitable regions of the U.S. may limit U.S. dependence on imported natural rubber [20,21]; however, the land use requirements and GHG emissions resulting from irrigation, fertilizer usage, and other agricultural activities may be intensive for the growing the crop [22]. Additionally, land for guayule production could be limited such that resulting rubber production may not meet rising demand for diverse rubber products on a global scale.…”

Section: Introductionmentioning

confidence: 99%

Bio-Based Polyisoprene Can Mitigate Climate Change and Deforestation in Expanding Rubber Production

2021

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Biomass is a promising renewable feedstock to produce polyisoprene for the rubber industry. Through metabolic engineering, sugars derived from pretreated and hydrolyzed cellulose and hemicellulose can be directly fermented to isoprene to produce rubber. Here we investigate the life cycle environmental impact of isoprene fermentation to produce bio-polyisoprene from agricultural residues (of Zea mays L.). Results show that the greenhouse gas (GHG) intensity of bio-polyisoprene (−4.59 kg CO2e kg−1) is significantly lower than that of natural rubber (Hevea brasiliensis) and synthetic rubber (−0.79 and 2.41 kg CO2e kg−1, respectively), while supporting a circular biogenic carbon economy. We found the land use intensity of bio-polyisoprene to be 0.25 ha metric ton−1, which is 84% lower than that from rubber tree plantations. We compare the direct fermentation to isoprene results with indirect fermentation to isoprene through the intermediate, methyl butyl ether, where dehydration to isoprene is required. The direct fermentation of isoprene reduces reaction steps and unit operations, an expected outcome when employing process intensification, but our results show additional energy conservation and reduced contribution to climate change. Among the ReCiPe life cycle environmental impact metrics evaluated, air emission related impacts are high for bio-polyisoprene compared to those for natural and synthetic rubber. Those impacts can be reduced with air emission controls during production. All other metrics showed an improvement for bio-polyisoprene compared to natural and synthetic rubber.

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“…Authors pointed out that the investigated guayule germplasm has a good genetic variability in biomass rubber and resin production also suggesting the possibility of selection for more than one trait at a time. Finally, the potential rubber and resin yields from Abdel-Haleem et al [33] were quite conservative compared to those indicated by Luo et al [34]. Derived from an experiment carried out in Arizona for estimating the potential breeding values for different guayule accessions (as Best Linear Unbiased Prediction), the potential rubber yield of 1200 kg ha −1 for 11591 and about 900 kg ha −1 for both AZ-1 and AZ-2, respectively, were reported [34].…”

Section: Discussionmentioning

confidence: 83%

Adaptation, Biometric Traits and Performances of Guayule Lines Grown in Two Mediterranean Environments

et al. 2020

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The perennial shrub guayule (Parthenium argentatum A. Gray) has gained interest as a potential source of natural and hypoallergenic rubber in Southern Europe. Although, native to northern Mexico, it is suited to semi-arid and Mediterranean environments. A research study was conducted in Sardinia (Italy) to evaluate adaptation and biometric traits of introduced guayule lines and to determine the contents and yields of rubber and resin obtainable from its aboveground biomass. Seedlings of the accessions AZ-1, AZ-2, P803, and 11591 were field transplanted in 2015 at two locations of southern, and northern Sardinia, respectively, differing for annual precipitation. Plant survival rate, height and width, trunk diameter, leaf chlorophyll concentration and photosystem photochemical efficiency were monitored. Shoots were harvested at 30 months after transplanting and were partitioned into twigs and remaining stems and its rubber and resin contents were determined. Location markedly affected plant survival rates and biometric traits. Dry matter yield of aboveground components as well as contents of rubber and resin and plant rubber and resin yields differed significantly among accessions under comparison. We found that AZ1 and 11591 were the most successful accessions at southern Sardinia site, whereas 11591 was the only accession exhibiting a satisfactory plant survival rate in the northern location.

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Phenotypic diversity of USDA guayule germplasm collection grown under different irrigation conditions

Cited by 8 publications

References 30 publications

A high-throughput quantification of resin and rubber contents in Parthenium argentatum using near-infrared (NIR) spectroscopy

A high-throughput quantification of resin and rubber contents in Parthenium argentatum using near-infrared (NIR) spectroscopy

Bio-Based Polyisoprene Can Mitigate Climate Change and Deforestation in Expanding Rubber Production

Adaptation, Biometric Traits and Performances of Guayule Lines Grown in Two Mediterranean Environments

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