Publications des scientifiques de l'IRD

Morillo E., Knudsen S. R., Second Gérard. (2017). Assessment of genetic relationships between cultivated arracacha (Arracacia xanthorrhiza Bancr.) and its wild close relatives in the area of domestication using microsatellite markers. Conservation Genetics, 18 (6), p. 1267-1275. ISSN 1566-0621.

Titre du document
Assessment of genetic relationships between cultivated arracacha (Arracacia xanthorrhiza Bancr.) and its wild close relatives in the area of domestication using microsatellite markers
Année de publication
2017
Type de document
Article référencé dans le Web of Science WOS:000414148900004
Auteurs
Morillo E., Knudsen S. R., Second Gérard
Source
Conservation Genetics, 2017, 18 (6), p. 1267-1275 ISSN 1566-0621
Arracacha (Arracacia xanthorrhiza Bancr.) is an asexual propagated root crop domesticated in the Andean highlands, which exists naturally with polycarpic and monocarpic forms. Wild A. xanthorrhiza are present in the area of domestication and can occasionally be mistaken in the same field for a crop or a weed. To study genetic relationships between cultivated arracacha and the wild forms, we surveyed the diversity of 178 plant samples at 11 microsatellite (SSR) loci. As expected, wild A. xanthorrhiza forms showed a significantly higher allelic diversity for all the examined SSR markers. The cultivated pool showed an excess of heterozygosity as opposed to a deficit found in the wild compartment. High Fst values and AMOVA analysis suggest that the cultivated variety has genetically differentiated from the wild forms and is more related to the wild polycarpic than to the monocarpic. Both the wild forms were well distinguished from the cultivars. Nevertheless, among a set of F1 experimental hybrids (cultivated x wild polycarpic), some other genotypes were revealed, also being admixed. Our results highlight a large genetic base available in the wild populations of A. xanthorrhiza with potential implications for the utilization and breeding of this promising crop.
Plan de classement
Sciences du monde végétal [076]
Description Géographique
EQUATEUR, PEROU, ANDES
Localisation
Fonds IRD [F B010071331]
Identifiant IRD
fdi:010071331
Contact