Phylogenomic analysis points to a South American origin of Manihot and illuminates the primary gene pool of cassava

Bibliographische Detailangaben
Veröffentlicht in:	The New phytologist. - 1979. - 233(2022), 1 vom: 19. Jan., Seite 534-545
1. Verfasser:	Simon, Marcelo F (VerfasserIn)
Weitere Verfasser:	Mendoza Flores, J Moises, Liu, Hsiao-Lei, Martins, Márcio Lacerda Lopes, Drovetski, Sergei V, Przelomska, Natalia A S, Loiselle, Hope, Cavalcanti, Taciana B, Inglis, Peter W, Mueller, Natalie G, Allaby, Robin G, Freitas, Fábio de Oliveira, Kistler, Logan
Format:	Online-Aufsatz
Sprache:	English
Veröffentlicht:	2022
Zugriff auf das übergeordnete Werk:	The New phytologist
Schlagworte:	Journal Article Research Support, Non-U.S. Gov't cassava crop-wild relatives diversification herbarium genomics introgression neotropical evolutionary history phylogenomics plant domestication

Beschreibung
Zusammenfassung:	© 2021 The Authors. New Phytologist © 2021 New Phytologist Foundation. This article has been contributed to by US Government employees and their work is in the public domain in the USA. The genus Manihot, with around 120 known species, is native to a wide range of habitats and regions in the tropical and subtropical Americas. Its high species richness and recent diversification only c. 6 million years ago have significantly complicated previous phylogenetic analyses. Several basic elements of Manihot evolutionary history therefore remain unresolved. Here, we conduct a comprehensive phylogenomic analysis of Manihot, focusing on exhaustive sampling of South American taxa. We find that two recently described species from northeast Brazil's Atlantic Forest were the earliest to diverge, strongly suggesting a South American common ancestor of Manihot. Ancestral state reconstruction indicates early Manihot diversification in dry forests, with numerous independent episodes of new habitat colonization, including into savannas and rainforests within South America. We identify the closest wild relatives to Manihot esculenta, including the crop cassava, and we quantify extensive wild introgression into the cassava gene pool from at least five wild species, including Manihot glaziovii, a species used widely in breeding programs. Finally, we show that this wild-to-crop introgression substantially shapes the mutation load in cassava. Our findings provide a detailed case study for neotropical evolutionary history in a diverse and widespread group, and a robust phylogenomic framework for future Manihot and cassava research
Beschreibung:	Date Completed 06.01.2022 Date Revised 06.01.2022 published: Print-Electronic Citation Status MEDLINE
ISSN:	1469-8137
DOI:	10.1111/nph.17743