Pubblicazione scientifica

Human management and hybridization shape treegourd fruits in the Brazilian Amazon Basin

FILONE TECNOLOGICO	TEMA
produzione e cattura

RIASSUNTO

Abstract

Local people's perceptions of cultivated and wild agrobiodiversity, as well as their management of hybridization are still understudied in Amazonia. Here we analyze domesticated treegourd (Crescentia cujete), whose versatile fruits have technological, symbolic, and medicinal uses. A wild relative (C. amazonica) of the cultivated species grows spontaneously in Amazonian flooded forests. We demonstrated, using whole chloroplast sequences and nuclear microsatellites, that the two species are strongly differentiated. Nonetheless, they hybridize readily throughout Amazonia and the proportions of admixture correlate with fruit size variation of cultivated trees. New morphotypes arise from hybridization, which are recognized by people and named as local varieties. Small hybrid fruits are used to make the important symbolic rattle (maracá), suggesting that management of hybrid trees is an ancient human practice in Amazonia. Effective conservation of Amazonian agrobiodiversity needs to incorporate this interaction between wild and cultivated populations that is managed by smallholder families. Beyond treegourd, our study clearly shows that hybridization plays an important role in tree crop phenotypic diversification and that the integration of molecular analyses and farmers’ perceptions of diversity help disentangle crop domestication history.

DATA

Data di pubblicazione: 04/05/2017

AUTORI

AMBROSIO MOREIRA PRISCILA
MARIAC CEDRIC
ZEKRAOUI LEILA
COUDERC MARIE
RODRIGUES DORIANE PICANCO
CLEMENT CHARLES R
VIGOUROUX YVES

ENTE DI AFFERENZA

Post–Graduate Program in Botany Instituto Nacional de Pesquisas da Amazônia (INPA) Manaus Amazonas Brazil
INST RECHERCHE DEV UNIV MONTPELLIER IRD UMR DIADE MONTPELLIER FRANCE
LAB DE EVOLUCAO APLICADA UNIV FEDERAL DO AMAZONAS UFAM MANAUS AMAZONAS BRAZIL
COORDENACAO DE TECNOLOGIA E INOVACAO INPA MANAUS AMAZONAS BRAZIL

RIVISTA

Evolutionary Applications, 10(6), 577-589

IMPACT FACTOR

4,910

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