"Aglione della Valdichiana" (Allium ampeloprasum var. holmense) is a landrace of Great Headed Garlic (GHG), an historical and healthy vegetable that has been recently rediscovered and registered in the National and Regional catalog of local varieties. It is grown in small fields in a region between Tuscany and Umbria, Italy, and due to its high market value, it is at risk of commercial frauds. The morphological traits and molecular profile of 9 local populations were evaluated together with 36 accessions of leek, garlic, wild relatives and other GHGs of different geographic origins and used as controls. The 39 morphological descriptors were able to distinguish the 9 accessions from leek and garlic, but unable to distinguish among them. The 549 AFLP (Amplified Fragment Length Polymorphism) amplicons obtained from nine primer combinations were able to clearly distinguish Aglione accessions from all the others, both by UPGMA (Unweighted Pair Group Method with Arithmetic mean) clustering and by STRUCTURE analysis, and this is due to several private AFLP bands, most from M+AGC/E+CTG primer combination. Despite its vegetative propagation, the within accession variability of Aglione is higher than expected and most likely due to somatic mutations. The genetic relationships are discussed, including the closer relationship found between Aglione and garlic vs. Aglione and leek.

Phenotypic and genetic characterization of "Aglione della Valdichiana": Population structure and genetic relationship analysis of a white gentle giant

Terzaroli, N
Methodology
;
Marconi, G
Investigation
;
Russi, L
Conceptualization
;
Albertini, E
Supervision
2022

Abstract

"Aglione della Valdichiana" (Allium ampeloprasum var. holmense) is a landrace of Great Headed Garlic (GHG), an historical and healthy vegetable that has been recently rediscovered and registered in the National and Regional catalog of local varieties. It is grown in small fields in a region between Tuscany and Umbria, Italy, and due to its high market value, it is at risk of commercial frauds. The morphological traits and molecular profile of 9 local populations were evaluated together with 36 accessions of leek, garlic, wild relatives and other GHGs of different geographic origins and used as controls. The 39 morphological descriptors were able to distinguish the 9 accessions from leek and garlic, but unable to distinguish among them. The 549 AFLP (Amplified Fragment Length Polymorphism) amplicons obtained from nine primer combinations were able to clearly distinguish Aglione accessions from all the others, both by UPGMA (Unweighted Pair Group Method with Arithmetic mean) clustering and by STRUCTURE analysis, and this is due to several private AFLP bands, most from M+AGC/E+CTG primer combination. Despite its vegetative propagation, the within accession variability of Aglione is higher than expected and most likely due to somatic mutations. The genetic relationships are discussed, including the closer relationship found between Aglione and garlic vs. Aglione and leek.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11391/1535833
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