In situ and genetic characterization of Gossypium barbadense populations from the states of Pará and Amapá, Brazil

Pesquisa Agropecuária Brasileira

Vanessa Cavalcante De Almeida²  Lúcia Vieira Hoffmann²  Gilberto Ken It Yokomizo¹  Joaquim Nunes Da Costa²  Marc Giband¹  Paulo Augusto Vianna Barroso² 

[1] ,Embrapa AlgodãoCampina Grande PB ,Brazil

关键词: cotton;    genetic diversity;    germplasm;    SSR markers;    algodoeiro;    diversidade genética;    germoplasma;    marcadores SSR;   

DOI  :  10.1590/S0100-204X2009000700011

来源: SciELO

【 摘 要 】

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 (F ST = 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.

【 授权许可】

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