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. 2021 Feb 26;12:611106. doi: 10.3389/fpls.2021.611106

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Copyright © 2021 Li, Deng, Tang, Su, Wang, Cheng, Yang, Qiu, Pu, Zhang, Liang, Yu, Wei and Long.

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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Spike morphology of the parents and representative lines. The morphology of spikes of K1 and CM42 at young spike stage when terminal spikelet appeared (A), heading stage (awn was cut) (B), and maturity (awn was cut) (C) are shown. (D) The mean of total spikelet number per spike (TSN) and fertile spikelet number per spike (FSN) of K1 and CM42 at maturity in five environments. (E) The morphology of spikes of representative lines from the K1/CM42 population; ^∗∗∗ represents significance at P < 0.001.