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The Evolutionary History of Wild, Domesticated, and Feral Brassica oleracea (Brassicaceae)

Cite this dataset

Mabry, Makenzie (2021). The Evolutionary History of Wild, Domesticated, and Feral Brassica oleracea (Brassicaceae) [Dataset]. Dryad.


Understanding the evolutionary history of crops, including identifying wild relatives, helps to provide insight for conservation and crop breeding efforts. Cultivated Brassica oleracea has intrigued researchers for centuries due to its wide diversity in forms, which include cabbage, broccoli, cauliflower, kale, kohlrabi, and Brussels sprouts. Yet, the evolutionary history of this species remains understudied. With such different vegetables produced from a single species, B. oleracea is a model organism for understanding the power of artificial selection. Persistent challenges in the study of B. oleracea include conflicting hypotheses regarding domestication and the identity of the closest living wild relative. Using newly generated RNA-seq data for a diversity panel of 224 accessions, which represents 14 different B. oleracea crop types and nine potential wild progenitor species, we integrate phylogenetic and population genetic techniques with ecological niche modeling, archaeological, and literary evidence to examine relationships among cultivars and wild relatives to clarify the origin of this horticulturally important species. Our analyses point to the Aegean endemic B. cretica as the closest living relative of cultivated B. oleracea, supporting an origin of cultivation in the Eastern Mediterranean region. Additionally, we identify several feral lineages, suggesting that cultivated plants of this species can revert to a wild-like state with relative ease. By expanding our understanding of the evolutionary history in B. oleracea, these results contribute to a growing body of knowledge on crop domestication that will facilitate continued breeding efforts including adaptation to changing environmental conditions.

Usage notes

Colors in transcript abudances and the module number they relate to in the manuscript:

1 grey
2 turquoise
3 blue
4 brown
5 yellow
6 green
7 red
8 black
9 pink
10 magenta
11 purple
12 greenyellow
13 tan
14 salmon
15 cyan
16 midnightblue
17 lightcyan
18 grey60
19 lightgreen
20 lightyellow
21 royalblue
22 darkred
23 darkgreen
24 darkturquoise
25 darkgrey
26 orange
27 darkorange
28 white
29 skyblue
30 saddlebrown
31 steelblue
32 paleturquoise
33 violet
34 darkolivegreen
35 darkmagenta
36 sienna3
37 yellowgreen
38 skyblue3
39 plum1
40 orangered4
41 mediumpurple3
42 ivory
43 lightcyan1
44 lightsteelblue1
45 floralwhite
46 darkorange2
47 brown4
48 bisque4