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. 2015 Aug 26;32(11):2905–2918. doi: 10.1093/molbev/msv164

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© The Author 2015. Published by Oxford University Press on behalf of the Society for Molecular Biology and Evolution.

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is properly cited. For commercial re-use, please contact journals.permissions@oup.com

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Fig. 5. — A model of the evolutionary emergence of MIR482/MIR2118 paralogs. (A) A model for the evolutionary emergence of a MIR482/MIR2118 precursor begins with the spontaneous formation of an inverted repeat of an NB-LRR gene or gene fragment through a duplication event that forms a long, well-paired stem-loop structure. This structure, over time, accumulates sequence mutations, which could also involve shortening of the structure. A short and imperfectly-paired stem-loop is a good substrate for DCL1 processing, leading to integration in the miRNA biogenesis pathway, as a canonical MIR482/MIR2118 gene. (B) Functional diversification of MIR482/MIR2118 in seed plants.