In situ and genetic characterization of Gossypium barbadense populations from the states of Para and Amapa, Brazil

Cavalcante De Almeida Vanessa, Vieira Hoffmann Lucia, Yokomizo Gilberto Ken It, Nunes Da Costa Joaquim, Giband Marc, Barroso Paulo Augusto Vianna. 2009. In situ and genetic characterization of Gossypium barbadense populations from the states of Para and Amapa, Brazil. Pesquisa Agropecuária Brasileira, 44 (7) : 719-725.

Quartile : Q2, Sujet : AGRICULTURE, MULTIDISCIPLINARY

Résumé : The objective of this work was to characterize the populations of Gossypium barbadense in the states of Amapá and Pará, Brazil. In situ characterization was conducted through interviews with the owners of the plants and environmental observations. Leaf or petal tissue as well as seed samples were collected for genetic characterization by single sequence repeats markers and for storage in germplasm banks, respectively. The plants were maintained in dooryards and used mainly for medical purposes. The genetic analysis showed no heterozygous plants at the loci tested (f = 1), indicating that reproduction occurs mainly through selfing. The total genetic diversity was high (He = 0.39); and a high level of differentiation was observed between cotton plants from the two states (FST = 0.36). Conventional methods of in situ maintenance of G. barbadense populations are not applicable. The conservation of the genetic variability of populations present in the two states could be achieved through germplasm collection and establishing of ex situ seed banks.

Mots-clés Agrovoc : Gossypium barbadense

Mots-clés géographiques Agrovoc : Amapa, Para

Classification Agris : F30 - Génétique et amélioration des plantes
F70 - Taxonomie végétale et phytogéographie

Champ stratégique Cirad : Axe 1 (2005-2013) - Intensification écologique

Auteurs et affiliations

• Cavalcante De Almeida Vanessa, EMBRAPA (BRA)
• Vieira Hoffmann Lucia, EMBRAPA (BRA)
• Yokomizo Gilberto Ken It, EMBRAPA (BRA)
• Nunes Da Costa Joaquim, EMBRAPA (BRA)
• Giband Marc, CIRAD-BIOS-UMR DAP (BRA) ORCID: 0000-0002-5553-5614
• Barroso Paulo Augusto Vianna, EMBRAPA (BRA)

Source : Cirad - Agritrop (https://agritrop.cirad.fr/551641/)

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