Folk taxonomy and evolutionary dynamics of cassava: A case study in Ubatuba, Brazil

Sambatti, Julianno B. M.; Martins, Paulo Sodero; Ando, Akihiko

doi:10.1007/bf02864549

Cited by 89 publications

(84 citation statements)

References 19 publications

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“…In Kei there are high levels of diversity, a high proportion of bitter folk-varieties, extensive management, much evidence of regular flowering and fruiting, and some evidence of volunteer seedlings, even though they are reckoned to be of no significance in introducing new genetic variation into the stock. Although we believe that in general terms the lower number of terms reported for Nuaulu compared with Debut reflects real genetic diversity, we acknowledge with Sambatti et al (2001) that folk classifications tend to underestimate actual diversity, and we suggest Nuaulu do so more than Kei farmers. Indeed, DNA data for a group of folk-varieties from both sites indicates greater genetic diversity for fewer folk-varieties in Rouhua compared with greater differentiation reflected in folk-variety distinctions in a relatively smaller gene pool for Debut.…”

Section: Comparison Of the Agroecology Of Research Sitesmentioning

confidence: 57%

A Comparative Study of the Socio-ecological Concomitants of Cassava (Manihot esculenta Crantz) Diversity, Local Knowledge and Management in Eastern Indonesia

Ellen

Soselisa

2012

Ethnobot. Res. App.

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Section: Comparison Of the Agroecology Of Research Sitesmentioning

confidence: 57%

A Comparative Study of the Socio-ecological Concomitants of Cassava (Manihot esculenta Crantz) Diversity, Local Knowledge and Management in Eastern Indonesia

Ellen

Soselisa

2012

Ethnobot. Res. App.

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“…At the time of harvest, they decide if a given volunteer is worth including among the plants that will be vegetatively propagated [25,32,34,35]. If so, smallholders can either incorporate the seedlings into an existing variety or use them to establish a new variety [25,29,31,36,37]. Genetic analyses confirmed seedling incorporation by detecting high polymorphism in local varieties [24,31,36,38], and by demonstrating that local varieties are polyclonal, with one predominant clone and a set of morphologically similar plants that are genetically different [30,34,39].…”

Section: Maniocmentioning

confidence: 99%

Origin and Domestication of Native Amazonian Crops

et al. 2010

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Molecular analyses are providing new elements to decipher the origin, domestication and dispersal of native Amazonian crops in an expanding archaeological context. Solid molecular data are available for manioc (Manihot esculenta), cacao (Theobroma cacao), pineapple (Ananas comosus), peach palm (Bactris gasipaes) and guaraná (Paullinia cupana), while hot peppers (Capsicum spp.), inga (Inga edulis), Brazil nut (Bertholletia excelsa) and cupuassu (Theobroma grandiflorum) are being studied. Emergent patterns include the relationships among domestication, antiquity (terminal Pleistocene to early Holocene), origin in the periphery, ample pre-Columbian dispersal and clear phylogeographic population structure for manioc, pineapple, peach palm and, perhaps, Capsicum peppers. Cacao represents the special case of an Amazonian species possibly brought into domestication in Mesoamerica, but close scrutiny of molecular data suggests that it may also have some incipiently domesticated populations in Amazonia. Another pattern includes the relationships among species with incipiently domesticated populations or very recently domesticated populations, rapid pre-or post-conquest dispersal and lack of phylogeographic population structure, e.g., Brazil nut, cupuassu and guaraná . These patterns contrast the peripheral origin of most species with domesticated OPEN ACCESSDiversity 2010, 2 73 populations with the subsequent concentration of their genetic resources in the center of the basin, along the major white water rivers where high pre-conquest population densities developed. Additional molecular genetic analyses on these and other species will allow better examination of these processes and will enable us to relate them to other historical ecological patterns in Amazonia.

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“…It was also observed that 56% of the farmers cultivate only one variety of D. trifida, unlike other species of vegetative propagation, such as cassava (Manihot esculenta), potato (Solanum tuberosum), sweet potato (Ipomoea batatas) (Brush et al, 1981;Salick et al, 1997;Sambatti et al, 2001;Emperaire and Peroni, 2007;Amorozo, 2008;Veasey et al, 2008), where it is customary to keep two or more varieties in the same farm. This decrease in the number of yam varieties maintained by farmers is worrisome because it is directly related to the loss of genetic resources and the process of genetic erosion.…”

Section: Distribution and Socioeconomic Aspectsmentioning

confidence: 99%

Distribution, management and diversity of the endangered Amerindian yam (Dioscorea trifida L.)

et al. 2015

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The objective of this study was to verify the occurrence of Dioscorea trifida in Brazil and to obtain information concerning its distribution, management and diversity. Farmers from 21 communities were interviewed in the states of São Paulo, Santa Catarina and Mato Grosso. During the visits, semi-structured interviews were conducted to collect socio-economic, management and diversity data for this crop. Fifty-one collected accessions, plus two accessions obtained at local markets of Amazonas, were characterized using 12 morphological traits. Most the interviewed farmers were men (75%) with a mean age of 59.5 years. Just a few young people and labor force were available for agricultural activities, with an average of only three individuals per farm. Most farmers (56%) grew only one variety of D. trifida, although 44% had more than one variety in their fields, which aims to provide greater assurance at harvest. Many popular names were observed for D. trifida, and cará roxo (purple yam) was the name most used by farmers (43.4%). Characters referring to the tuber, such as skin and flesh color, were most relevant for the distinction of the accessions. The results of this study may collaborate to develop strategies for conservation, both ex situ and in situ, within the view of on farm conservation. Keywords

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Folk taxonomy and evolutionary dynamics of cassava: A case study in Ubatuba, Brazil

Cited by 89 publications

References 19 publications

A Comparative Study of the Socio-ecological Concomitants of Cassava (Manihot esculenta Crantz) Diversity, Local Knowledge and Management in Eastern Indonesia

A Comparative Study of the Socio-ecological Concomitants of Cassava (Manihot esculenta Crantz) Diversity, Local Knowledge and Management in Eastern Indonesia

Origin and Domestication of Native Amazonian Crops

Distribution, management and diversity of the endangered Amerindian yam (Dioscorea trifida L.)

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