Genetic diversity and population structure in a collection of roselle (Hibiscus sabdariffa L.) from Niger

Bakasso Yacoubou, Zaman-Allah Mainassara, Mariac Cédric, Billot Claire, Vigouroux Yves, Zongo Jean-Didier, Saadou Mahamane. 2014. Genetic diversity and population structure in a collection of roselle (Hibiscus sabdariffa L.) from Niger. Plant Genetic Resources, 12 (2) : 207-214.

Quartile : Q4, Sujet : PLANT SCIENCES

Résumé : Roselle (Hibiscus sabdariffa L.) is an economically important plant in Niger. Little is known about its genetic diversity and population structure. In this study, we performed the first diversity assessment of a collection of 124 roselle accessions and 16 accessions of its close relatives Hibiscus cannabinus and Abelmoschus esculentus. Our study was based on ten agromorphological traits and 267 amplified fragment length polymorphism markers. We identified two major distinct groups in H. sabdariffa using a Bayesian method. These two genetic groups were associated with statistical differences for three phenological characteristics: number of days to flowering, 100-seed weight and calyx size. However, the calyx colour, i.e. a morphological characteristic often used to classify different local ecotypes, did not superimpose this separation. Our findings suggested that roselle diversity is genetically structured; the two different groups were clearly associated with morphological differences but were not commonly used by farmers for their classification. The impact of the perceived ecotype structure and its consequence on farmer management is discussed.

Mots-clés Agrovoc : Hibiscus sabdariffa, variation génétique, génétique des populations, collection de matériel génétique, Hibiscus cannabinus, Abelmoschus esculentus, marqueur génétique, polymorphisme génétique, morphologie végétale, anatomie végétale, caractère agronomique, distribution géographique, adn, méthode statistique

Mots-clés géographiques Agrovoc : Niger

Classification Agris : F30 - Génétique et amélioration des plantes
F70 - Taxonomie végétale et phytogéographie
F50 - Anatomie et morphologie des plantes
U10 - Informatique, mathématiques et statistiques

Champ stratégique Cirad : Axe 1 (2014-2018) - Agriculture écologiquement intensive

Auteurs et affiliations

• Bakasso Yacoubou, Université Abdou Moumouni (NER)
• Zaman-Allah Mainassara, Université de Maradi (NER)
• Mariac Cédric, IRD (FRA)
• Billot Claire, CIRAD-BIOS-UMR AGAP (FRA)
• Vigouroux Yves, IRD (FRA)
• Zongo Jean-Didier, Université de Ouagadougou (BFA)
• Saadou Mahamane, Université Abdou Moumouni (NER)

Source : Cirad - Agritrop (https://agritrop.cirad.fr/574718/)

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