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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Growing Cassava (Manihot esculenta) in Mato Grosso, Brazil: Genetic Diversity Conservation in Small-Scale Agriculture

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Carrasco, N. F. [1] ; Oler, J. R. L. [2] ; Marchetti, F. F. [2] ; Carniello, M. A. [3] ; Amorozo, M. C. M. [2] ; Valle, T. L. [4] ; Veasey, E. A. [1]
Total Authors: 7
[1] Univ Sao Paulo, ESALQ, Dept Genet, Piracicaba, SP - Brazil
[2] Univ Estadual Paulista, Dept Ecol, Rio Claro, SP - Brazil
[3] Univ Estadual Mato Grosso UNEMAT, Fac Ciencias Agr & Biol, MT, Dept Ciencias Biol, Campus Caceres, Caceres, MT - Brazil
[4] Inst Agron Campinas, Secao Hort, Campinas, SP - Brazil
Total Affiliations: 4
Document type: Journal article
Source: ECONOMIC BOTANY; v. 70, n. 1, p. 15-28, MAR 2016.
Web of Science Citations: 2

Growing Cassava ( Manihot esculenta ) in Mato Grosso, Brazil: Genetic Diversity Conservation in Small-Scale Agriculture. Cassava (Manihot esculenta Crantz) is a tropical species that stands out as a food source for developing countries. Within an ethnobotanical and socioeconomic context, this study aimed to compare the level of genetic diversity of cassava maintained by small farmers in three municipalities of the Cuiaba Lowland in the state of Mato Grosso, Brazil: Caceres, Porto Estrela, and Santo Antnio do Leverger. This region, which is included in the center of origin of cassava, is currently undergoing profound socioeconomic changes that can have negative impacts in the on farm conservation of cassava agrobiodiversity. We characterized 211 genotypes collected in 40 households in 10 communities, using 14 microsatellite loci. High levels for the observed (H (O) = 0.587) and expected (H (E) = 0.525) heterozygosities were found, whereas most of the genetic diversity was concentrated within communities (92%). A genetic differentiation was found between the municipality of Santo Antnio do Leverger and the municipalities of Caceres and Porto Estrela, not only due to a higher geographic distance among them, but also due to soil, climatic, and cultural factors. A different number of local varieties was observed in each municipality, while the number of unique varieties in each municipality was high, 83%, 84%, and 61%, respectively, representing an important aspect for the in situ conservation of this crop. Although local names provided by farmers were phenotypically coherent, intravarietal variability among local varieties sharing the same name was high (97%). Santo Antnio do Leverger was considered as a priority area for in situ conservation. Nevertheless, in view of the decline in local traditional agriculture systems and socioeconomic transformations in this region, public policies providing support and incentives to farmers are necessary. (AU)

FAPESP's process: 08/03822-3 - Agrobiodiversity conservation and socio-economic dynamics among small farmers in rural communities of the Baixada Cuiabana in Mato Grosso
Grantee:Elizabeth Ann Veasey
Support Opportunities: Regular Research Grants