NDLI: Molecular differentiation, diversity, and folk classification of “sweet” and “bitter” cassava (Manihot esculenta) in Caiçara and Caboclo management systems (Brazil)

Content Provider	Springer Nature Link
Author	Peroni, Nivaldo Kageyama, Paulo Yoshio Begossi, Alpina
Copyright Year	2007
Abstract	This study focuses the inter-relationships among the men, the use, and the intra-specific cassava diversity, under the perspective of this crop evolutionary dynamics. The origin, the use and the current local management of varieties with high and low cyanogenic potential are important questions around cassava domestication. We collected 169 local varieties identified as “sweet” or “bitter” cassava by traditional farmers from Atlantic Forest and Amazon (Medium Negro River Basin), Brazil. Using a population genetics and an ethnobotany approach, the diversity and the genetic structure of cassava were evaluated. We found a total of 115 vernacular names, and in the Atlantic Forest sample the average genetic diversity (H S = 0.654) was higher for the sweet varieties than for bitter ones (0.582). The genetic differentiation coefficient (R ST), used to estimate the diversity among groups, was 0.057 (P < 0.001), indicating that the divergence between the two groups is low. We obtained a low correlation between the morphological and genetic distances, and the congruence was high when the ethnoclassification and the genetic structure were considered. We discuss the adaptive advantages of the sweet varieties use, the current socio-economic changes in bitter varieties use, and the ecological history of these variety groups.
Starting Page	1333
Ending Page	1349
Page Count	17
File Format	PDF
ISSN	09259864
Journal	Genetic Resources and Crop Evolution
Volume Number	54
Issue Number	6
e-ISSN	15735109
Language	English
Publisher	Kluwer Academic Publishers
Publisher Date	2007-03-10
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Atlantic Forest Bitter cassava Caboclos Caiçaras Manihot esculenta Crantz Sweet cassava Plant Pathology Plant Physiology Plant Sciences
Content Type	Text
Resource Type	Article
Subject	Genetics Plant Science Ecology, Evolution, Behavior and Systematics Agronomy and Crop Science

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