Historic manioc genomes illuminate maintenance of diversity under long-lived clonal cultivation

• 成果类型: Article
• 署名作者: Kistler, Logan; Freitas, Fabio de Oliveira; Gutaker, Rafal M.; Maezumi, S. Yoshi; Ramos-Madrigal, Jazmin; Simon, Marcelo F.; Mendoza F, J. Moises; Drovetski, Sergei V.; Loiselle, Hope; de Oliveira, Eder Jorge; Vieira, Eduardo Alano; Carvalho, Luiz Joaquim Castelo Branco; Perez, Marina Ellis; Lin, Audrey T.; Liu, Hsiao-Lei; Miller, Rachel; Przelomska, Natalia A. S.; Ratan, Aakrosh; Wales, Nathan; Wann, Kevin; Zhang, Shuya; Garcia, Magdalena; Valenzuela, Daniela; Rothhammer, Francisco; Santoro, Calogero M.; Domic, Alejandra I.; Capriles, Jose M.; Allaby, Robin G.
• 署名单位: Smithsonian Institution; Smithsonian National Museum of Natural History; Empresa Brasileira de Pesquisa Agropecuaria (EMBRAPA); EMBRAPA Genetic Resources & Biotechnology; Royal Botanic Gardens, Kew; Max Planck Society; University of Copenhagen; Smithsonian Institution; Smithsonian National Museum of Natural History; University of Washington; University of Washington Seattle; Empresa Brasileira de Pesquisa Agropecuaria (EMBRAPA); EMBRAPA Mandioca & Fruticultura; Empresa Brasileira de Pesquisa Agropecuaria (EMBRAPA); EMBRAPA Cerrados; University of Warwick; American Museum of Natural History (AMNH); McMaster University; University of Portsmouth; University of Virginia; University of York - UK; Texas A&M University System; Texas A&M University College Station; Universidad de Tarapaca; Universidad de Tarapaca; Pennsylvania Commonwealth System of Higher Education (PCSHE); Pennsylvania State University; Pennsylvania State University - University Park; Pennsylvania Commonwealth System of Higher Education (PCSHE); Pennsylvania State University; Pennsylvania State University - University Park
• 刊物名称: SCIENCE
• ISSN/ISSBN: 0036-8297
• DOI: 10.1126/science.adq0018
• 发表日期: 2025-03-07
• 关键词: manihot-esculenta crantz; starch grain evidence; deleterious mutations; genetic diversity; crop cultivation; cassava; domestication; south; root; maize

摘要

Manioc-also called cassava and yuca-is among the world's most important crops, originating in South America in the early Holocene. Domestication for its starchy roots involved a near-total shift from sexual to clonal propagation, and almost all manioc worldwide is now grown from stem cuttings. In this work, we analyze 573 new and published genomes, focusing on traditional varieties from the Americas and wild relatives from herbaria, to reveal the effects of this shift to clonality. We observe kinship over large distances, maintenance of high genetic diversity, intergenerational heterozygosity enrichment, and genomic mosaics of identity-by-descent haploblocks that connect all manioc worldwide. Interviews with Indigenous traditional farmers in the Brazilian Cerrado illuminate how traditional management strategies for sustaining, diversifying, and sharing the gene pool have shaped manioc diversity.