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Tracking the evolutionary history of the Allium ampeloprasum L. complex (section Allium) provides evidence of the contribution of North African diploids to the formation of allopolyploid horticultural groups
- Source :
- Genetic Resources and Crop Evolution, Genetic Resources and Crop Evolution, Springer Verlag, 2020, 67 (7), pp.1885-1904. ⟨10.1007/s10722-020-00948-x⟩, Genetic Resources and Crop Evolution, 2020, 67 (7), pp.1885-1904. ⟨10.1007/s10722-020-00948-x⟩
- Publication Year :
- 2020
- Publisher :
- Springer Science and Business Media LLC, 2020.
-
Abstract
- International audience; The economically important Allium ampeloprasum L. represents a polyploid complex, comprising hexa- and octoploid Great Headed Garlic horticultural cultivars (6x-8x GHG) and several traditional varieties of the tetraploid (4x) leeks (Leek, Bulbous leek, Kurrat and Pearl onion). Its wild representatives were indicated as rare in the Mediterranean region. This study aims to explore the diversity and origin of polyploidy in this complex, including its wild relatives A. baeticum Bossier and A. guttatum Steven with particular focus on the poorly investigated North-African region. Natural populations were sampled in Algeria in various bioclimatic conditions, then subjected to karyological and molecular phylogenetic analyses based on nuclear rDNA ITS region and chloroplast trnL-trnF and trnD-trnT intergenic spacers. Comparative analyses included available Genbank accession sequences representing old-world relatives. Chromosome count surveys revealed an unexpected higher occurrence of diploid (2n = 16) than tetraploid (2n = 32) cytotypes. The phylogenetic analyses first allowed positioning the Algerian material within the A. ampeloprasum complex. Interestingly, all the Algerian diploid and tetraploid populations from A. ampeloprasum and A. baeticum form a distinct monophyletic group. The results provide novel and robust evidence demonstrating that the North African diploid A. ampeloprasum genetic pool widely contributed as a source of progenitors not only for the A. ampeloprasum and A. baeticum Algerian tetraploids, but also in the formation of the GHG and Leek cultivated allopolyploids. Therefore, the North African populations emerge as an important reservoir of new wild genetic resources of great interest for tracing the origin of crop domestication and for breeding programs of cultivated varieties.
- Subjects :
- 0106 biological sciences
0301 basic medicine
Molecular phylogeny
Plant Science
[SDV.BID.SPT]Life Sciences [q-bio]/Biodiversity/Systematics, Phylogenetics and taxonomy
01 natural sciences
03 medical and health sciences
Intergenic region
Allium ampeloprasum
Botany
Genetics
Wild genetic resources
Domestication
Ecology, Evolution, Behavior and Systematics
2. Zero hunger
biology
Allium ampeloprasum complex
Diploids
food and beverages
Polyploids
Polyploid complex
[SDV.BV.BOT]Life Sciences [q-bio]/Vegetal Biology/Botanics
15. Life on land
biology.organism_classification
030104 developmental biology
Algeria
Molecular phylogenetics
Allium
Gene pool
Ploidy
Agronomy and Crop Science
010606 plant biology & botany
Subjects
Details
- ISSN :
- 15735109 and 09259864
- Volume :
- 67
- Database :
- OpenAIRE
- Journal :
- Genetic Resources and Crop Evolution
- Accession number :
- edsair.doi.dedup.....a19a3f10b96c6f991e81dcebccd59d92