Evidence for mid-Holocene rice domestication in the Americas

Hilbert, Lautaro; Neves, Eduardo Góes; Pugliese, Francisco; Whitney, Bronwen S.; Shock, Myrtle P.; Veasey, Elizabeth Ann; Zimpel, Carlos Augusto; Iriarte, José

doi:10.1038/s41559-017-0322-4

Cited by 105 publications

(81 citation statements)

References 32 publications

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“…At this stage, it is difficult to explain why the vegetation in the eastern and the western sides of the Mamoré responded differently to the dry period. Cerrado savannah, in order to be maintained, needs fire (Hoffmann et al, 2012) and people had already settled in SW Amazonia by the beginning of the Holocene (Hilbert et al, 2017;Lombardo et al, 2013b). Therefore, the differences we see between the western and eastern sides of the Mamoré could be due to differences in land-use.…”

Section: Discussionmentioning

confidence: 93%

Holocene land cover change in south-western Amazonia inferred from paleoflood archives

Lombardo

Pérez

Rodrigues

et al. 2019

Global and Planetary Change

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This study provides new data on the evolution of the landscape in southwestern Amazonia during the Holocene and the impact of climate change and fluvial dynamics on the region's ecosystems. Southwestern Amazonia is covered by an extensive seasonally flooded savannah, known as the Llanos de Moxos. Severe drought during the southern hemisphere winter, followed by months of permanent waterlogging, means that forests only grow on the most elevated parts of the landscape, mostly river and paleoriver levees and crevasse splays. Paleoclimate reconstructions from surrounding areas show that a shift to wetter conditions at around 4 kyr BP caused an increase in forest cover. However, the impact that this change in climate had on the landscape of the Llanos de Moxos is unknown. Published lacustrine archives from the area only cover the last 2 kyr. Here we present new data from the analysis of paleosols located along a 300 km transect across the central Llanos. The analyses of stable carbon isotopes, from 36 paleosols, and biogenic silica, from 29 paleosols, show that the patchwork of forests and savannahs that we see today was established after the 4 kyr BP climate change. During the dry period between 8 and 4 kyr BP, most of the central Llanos de Moxos, nowadays covered with seasonally flooded savannah, were covered by Cerrado-like savannah in the west and by forest in the east. However, results also suggest that, at both regional and local scales, vegetation cover has been influenced by changes in topography resulting from the region's river dynamics.

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Section: Discussionmentioning

confidence: 93%

Holocene land cover change in south-western Amazonia inferred from paleoflood archives

Lombardo

Pérez

Rodrigues

et al. 2019

Global and Planetary Change

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“…Phytoliths are plant-produced micro silica bodies which can, in some cases, have a diagnostic morphology that can be distinguished among taxa; in particular, phytoliths in the Poaceae family can have taxonomic value in archaeological contexts and natural sediments (Twiss et al, 1969;Wang and Lu, 1993;Piperno, 2006). Based on phytolith taxonomy and morphology, phytolith analysis has been proven to be a reliable tool in understanding the taxonomy and evolution of plants (Prychid et al, 2003;Rudall et al, 2014;Dinda and Mondal, 2018), paleoecology (Blinnikov et al, 2002;Stromberg, 2005;Gu et al, 2008;Stromberg et al, 2013;Dunn et al, 2015), and paleoclimate (Prebble and Shulmeister, 2002;Lu et al, 2007;Zuo et al, 2016;Liu H. et al, 2018); in recent years, it has been extensively employed in investigating the origin, development, and spread of agriculture (Lu et al, 2009a;Piperno et al, 2009;Madella et al, 2014;Ball et al, 2016a;Hilbert et al, 2017;Deng et al, 2018;He et al, 2018). However, compared to studies on the leaf phytoliths of Poaceae plants, inflorescence phytoliths have not been extensively studied and have generally focused on crop species and their relatives (Ball et al, 2016a).…”

Section: Introductionmentioning

confidence: 99%

Phytoliths in Inflorescence Bracts: Preliminary Results of an Investigation on Common Panicoideae Plants in China

Lü

Zhang

et al. 2020

Front. Plant Sci.

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Phytoliths in the inflorescence of Poaceae plants can be of high taxonomic value in some archaeological contexts and provide insight into plant taxonomy and crop domestication processes. In this study, phytoliths in every inflorescence bract of 38 common Panicoideae weeds and minor crops in China were studied. Based on dissection of the inflorescence into different bracts using a treatment that retained the phytoliths anatomical position, observations of inflorescence phytoliths types and distribution were described in detail. We found that INTERDIGITATING, Blocky amoeboid, Rectangular dentate, and Elongate dendritic with multi tent-like arch tops were of higher taxonomic value than the other types in our studied species. Both morphological and morphometric traits of the INTERDIGITATING were summarized and compared with previous studies; the findings suggested that genus level discrimination of some Paniceae species could be reliable, and tribe/species level discrimination might be feasible. The phytoliths in the involucre of domesticated and wild type Coix lacryma-jobi provided insight into the domestication process of this plant. Our data also indicated that phytolith production in the inflorescence bracts might be under the genetic and molecular control of inflorescence development. Thus, the findings of this study could assist future studies in plant taxonomy and archaeobotany.

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“…Most of the rice in Latin America has European origin; however, there are at least two native rice species in South America, and one or both were used by the indigenous inhabitants of the region to create the domesticated forms of Oryza sp. (Hilbert et al , ). Remarkably, one endemic haplotype was observed from Costa Rica, giving rise to the hypothesis that the introduced European populations and native population may coexist in Latin America A. besseyi .…”

Section: Discussionmentioning

confidence: 99%

Population structure and species delimitation of rice white tip nematode, Aphelenchoides besseyi (Nematoda: Aphelenchoididae), in China

Xue

Xie

et al. 2019

Plant Pathology

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Aphelenchoides besseyi is a major nematode pathogen in rice known as the causal agent of white tip disease. In the present study, A. besseyi was recovered from 32 seed samples collected from the major rice‐growing regions in China. Nine mitochondrial COI haplotypes and 95 ITS genotypes were identified, suggesting a high genetic diversity and endemism level of A. besseyi in China. Therefore, A. besseyi is likely to have experienced a long history of host–parasite coevolution in China, rather than being recently introduced from other countries. The results of population structure analysis indicated the presence of four clusters within Chinese A. besseyi, but these did not correspond to their geographic distribution. Haplotype H2 was found to be the most widespread. Haplotypes H9 and H13 were most genetically divergent and have been recognized as two cryptic species by molecular species delimitation methods, and with limited support from morphometric measurements. The COI‐based phylogeny suggested the ability to parasitize rice has independently evolved at least four times in the genus Aphelenchoides.

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Evidence for mid-Holocene rice domestication in the Americas

Cited by 105 publications

References 32 publications

Holocene land cover change in south-western Amazonia inferred from paleoflood archives

Holocene land cover change in south-western Amazonia inferred from paleoflood archives

Phytoliths in Inflorescence Bracts: Preliminary Results of an Investigation on Common Panicoideae Plants in China

Population structure and species delimitation of rice white tip nematode, Aphelenchoides besseyi (Nematoda: Aphelenchoididae), in China

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