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. 2022 Oct 13;13:1023041. doi: 10.3389/fgene.2022.1023041

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Copyright © 2022 Yang, Ji, Cui, Zhao, Ding and Xu.

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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LTR-lncRNAs are functional in porcine early embryonic development. (A) The number of reads mapped to ERV in zygotes was higher than in oocytes. (B) Differential expression analysis of ERV-associated lncRNAs from oocytes and zygotes. The red dots indicate an LTR that is highly expressed in oocytes, the green dots indicate an LTR that is highly expressed in zygotes, and the blue dots indicate an LTR that has no significant difference between oocytes and zygotes. (C,D) The top five LTR-associated transcripts in oocyte (C) and zygote (D), respectively. (E,F) TCONS_00035465 showed high expression at the two-cell stage, and TCONS_00031520 showed high expression at the eight-cell stage.