Patterns of nuclear and chloroplast genetic diversity and structure of manioc along major Brazilian Amazonian rivers

Autor(es)

Alves-Pereira, Alessandro ^[1] ; Clement, Charles R. ^[2] ; Picanco-Rodrigues, Doriane ^[3] ; Veasey, Elizabeth A. ^[1] ; Dequigiovanni, Gabriel ^[1] ; Ramos, Santiago L. F. ^[1] ; Pinheiro, Jose B. ^[1] ; Zucchi, Maria I. ^[4]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo ESALQ USP, Escola Super Agr Luiz de Queiroz, Dept Genet, Ave Padua Dias 11, BR-13418900 Piracicaba, SP - Brazil

^[2] Inst Nacl Pesquisas Amazonia INPA, Ave Andre Araujo 2936, BR-69067375 Manaus, Amazonas - Brazil

^[3] Univ Fed Amazonas ICB UFAM, Inst Ciencias Biol, Ave Rodrigo Octavio 6200, BR-69077000 Manaus, Amazonas - Brazil

^[4] Agencia Paulista Tecnol Agronegocios, Polo Ctr Sul APTA, Highway SP 127, Km 30, BR-13400970 Piracicaba, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: ANNALS OF BOTANY; v. 121, n. 4, p. 625-639, MAR 2018.
• Citações Web of Science: 6

Resumo

Amazonia is a major world centre of plant domestication, but little is known about how the crops were dispersed across the region. Manioc (Manihot esculenta) was domesticated in the south-western Amazon basin, and is the most important staple food crop that originated in Amazonia. Current contrasting distributions may reflect distinct histories of dispersal of bitter and sweet manioc landraces. To produce new insights into the evolutionary history of the crop, we investigated the contemporary genetic diversity and structure of bitter and sweet manioc along major Amazonian rivers. The patterns of genetic structure and diversity of wild and cultivated sweet and bitter manioc with four chloroplast and 14 nuclear microsatellite markers were evaluated. Results were interpreted in terms of the crop's dispersal. No phylogeographic patterns among rivers were detected, and genetic structure among rivers was confounded by the bitter-sweet divergence. However, differences in the distribution of nuclear diversity and somewhat distinctive patterns of genetic structure across rivers were observed within bitter and sweet manioc. Various pre-Columbian and post-European conquest events in the history of Amazonian occupation may explain the absence of clearer patterns of genetic structure. However, the wide distribution of the most common chloroplast haplotype agrees with an early dispersal of manioc across Brazilian Amazonia. Furthermore, differences in genetic structure and in the spatial distribution of genetic diversity suggest that bitter and sweet manioc had distinct dispersal histories. Knowledge about how prehistoric and contemporary Amazonian peoples manage their crops is valuable for the maintenance and conservation of the impressive diversity of their native crops. (AU)

• Processo FAPESP: 12/08307-5 - Estrutura genética e sistema de cruzamento de variedades locais e populações silvestres de urucum (Bixa orellana L.) na Amazônia Brasileira e no Brasil Central utilizando marcadores microssatélites
• Beneficiário: Elizabeth Ann Veasey
• Linha de fomento: Auxílio à Pesquisa - Regular
• Processo FAPESP: 13/08884-5 - Estrutura genética e sistema reprodutivo de populações de urucum (Bixa orellana L.) da Amazônia Brasileira e Brasil Central utilizando marcadores microssatélites
• Beneficiário: Gabriel Dequigiovanni
• Linha de fomento: Bolsas no Brasil - Doutorado
• Processo FAPESP: 13/11137-7 - Diversidade Genética, Genômica e Filogeografia de mandioca (Manihot esculenta Crantz): Implicações para a dispersão do cultivo ao longo dos principais eixos fluviais da bacia Amazônica brasileira
• Beneficiário: Alessandro Alves Pereira
• Linha de fomento: Bolsas no Brasil - Doutorado
• Processo FAPESP: 13/00003-0 - Diversidade genética, genômica e filogeografia de mandioca (Manihot esculenta Crantz): implicações para a dispersão e difusão do cultivo ao longo dos principais eixos fluviais da Bacia Amazônica no Brasil
• Beneficiário: Maria Imaculada Zucchi
• Linha de fomento: Auxílio à Pesquisa - Regular