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. 2020 Mar 25;11:339. doi: 10.3389/fpls.2020.00339

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Copyright © 2020 Muoki, Maritim, Oluoch, Kamunya and Bore.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Schematic diagram on tea improvement strategies and techniques that have evolved over a period of time. Arrows in between boxes 1, 2, 3, and 4 show the evolutionary time scale of the development of the strategies. CATs, clonal adaptability trials; CFTs, clonal field trials; MAS, marker assisted selection; PTs, progeny trials; QTLs, quantitative trait loci.