Articles
Morphological characterization of Origanum vulgare spp. virens from spontaneous populations in Alentejo (Portugal)
Article number
1358_7
Pages
49 – 56
Language
English
Abstract
Origanum vulgare spp. virens is used as an aromatic, flavouring and medicinal plant in Alentejo region, Portugal.
Its sustainable cultivation should contribute to reduce genetic erosion caused by harvesting in nature.
This study was based on 14 accessions of oregano propagated from stem terminal herbaceous cuttings during spring 2021, collected from previously identified places throughout Alentejo region.
The rooted plants were transferred to the field essay in April 2021, constituted by 3 randomized blocks.
Observations were done using the 2011 ECPGR Working Group on Medicinal and Aromatic Plants Draft Descriptor List for O. vulgare. A total of 53 descriptors were considered.
A multivariate statistical analysis (cluster analysis and principal components analysis) was done with the obtained data.
High variably within and between accessions was observed.
Most of the evaluated descriptors had statistically significant difference (p<0.05) between accessions.
Three groups of accessions were found with cluster analysis.
Group 2 includes Ov6-Marvão, Ov8-Redondo and Ov16-Sousel; group 3 includes Ov14 (Mora), Ov15 (Alcácer do Sal), Ov20 (Serpa) and Ov21 (Alandroal); group 1 includes the remnant 7 accessions.
Group 2 had plants with large inflorescences (width and length), large inflorescence bracts and large leafs (length and width). Group 3 had plants with heavier seeds, higher number of stems, higher leaf density and higher inflorescence biomass production.
Group 1 had smaller inflorescences, with smaller bracts and lower inflorescence biomass, also have lower stem number and lower leaf density.
Group 3 (Ov14, Ov15, Ov20 and Ov21) had the higher agronomic potential for future plant breeding programs.
Further studies should be carried out for agronomic and chemical characterization of accessions from this subspecies.
Its sustainable cultivation should contribute to reduce genetic erosion caused by harvesting in nature.
This study was based on 14 accessions of oregano propagated from stem terminal herbaceous cuttings during spring 2021, collected from previously identified places throughout Alentejo region.
The rooted plants were transferred to the field essay in April 2021, constituted by 3 randomized blocks.
Observations were done using the 2011 ECPGR Working Group on Medicinal and Aromatic Plants Draft Descriptor List for O. vulgare. A total of 53 descriptors were considered.
A multivariate statistical analysis (cluster analysis and principal components analysis) was done with the obtained data.
High variably within and between accessions was observed.
Most of the evaluated descriptors had statistically significant difference (p<0.05) between accessions.
Three groups of accessions were found with cluster analysis.
Group 2 includes Ov6-Marvão, Ov8-Redondo and Ov16-Sousel; group 3 includes Ov14 (Mora), Ov15 (Alcácer do Sal), Ov20 (Serpa) and Ov21 (Alandroal); group 1 includes the remnant 7 accessions.
Group 2 had plants with large inflorescences (width and length), large inflorescence bracts and large leafs (length and width). Group 3 had plants with heavier seeds, higher number of stems, higher leaf density and higher inflorescence biomass production.
Group 1 had smaller inflorescences, with smaller bracts and lower inflorescence biomass, also have lower stem number and lower leaf density.
Group 3 (Ov14, Ov15, Ov20 and Ov21) had the higher agronomic potential for future plant breeding programs.
Further studies should be carried out for agronomic and chemical characterization of accessions from this subspecies.
Authors
O. Póvoa, M. Paulo, F. Mondragão-Rodrigues, N. Farinha
Keywords
genetic resources, medicinal-plant, crop adaptation, stem cutting, plant descriptors
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