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Figure 1.

Location of the Kuahuqiao, Tianluoshan, Maoshan, Bianjiashan, and Qianshanyang sites.

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Figure 2.

Archaeological remains of peaches.

1, 2, 3, Qianshanyang site; 4, 5, 6, Maoshan site; 7–12, Kuahuqiao illustrating two variants of peach stones, one with short grooves and small pits and the other with prominent grooves and pits. L = length, W = width and Ds = suture diameter.

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Figure 3.

Stones of wild and domesticated peaches.

1. P. persica (feral type); 2. P. davidiana var. potaninii; 3. P. davidiana var. davidiana; 4. P. kansuensis; 5. P. persica (domesticated type); 6. P. ferganensis (domesticated type from Xinjiang); 7. P. mira.

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Figure 4.

Correlation of stone and fruit sizes in modern peach cultivars.

The data are from and the feral peaches growing in Zhejiang, China.

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Figure 5.

AMS dates on Prunus stones.

All are P. persica except for D-3381 that is P. sp., a plum/cherry. Conventional dates were calibrated using Calib 6.0 using the Intcal 09 curve (1, 2).

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Figure 6.

Box plots of peach stone size (L×W×Ds) and ratios of L, W, and Ds.

The plots illustrate an overall trend to the ratios diverging from 1∶1 through time and of approximate stone volume increasing through time. The top, bottom and line through the middle of the box correspond to the 75th percentile (top quartile), 25th percentile (bottom quartile) and 50th percentile (median) respectively. The whiskers on the bottom extend from the 10th percentile (bottom decile) and top 90th percentile (top decile). Means are joined. The circles are a graphic representation of Student's t-test results. The concentric circles indicate that the means are not significantly different. The Liangzhu culture plot is a combination of the Maoshan (n = 99) and Bianjiashan (n = 23) measurements.

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Figure 7.

Contour map of scatterplot of Ikiriki, Kuahuqiao, Tianluoshan and Liangzhu Culture (Maoshan and Bianjiashan sites combined) peach stone measurements.

The colors emphasize the highest three contours (the peaks) of each scatterplot. The dashed lines indicate the peaks for the smaller (S) and larger (L) stones. 1. Reimer PJ, et al. (2011) IntCal09 and Marine09 Radiocarbon Age Calibration Curves, 0–50,000 Years cal BP. 2. Stuiver M & Reimer PJ (1993) Extended 14C data base and revised CALIB 3.0 (super 14) C age calibration program.

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