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. 2022 Mar 29;13:857896. doi: 10.3389/fpls.2022.857896

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Copyright © 2022 Zhang.

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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Strategies for overcoming indica-japonica hybrid sterility. (A) Chromosomal location of the S5, Sa, Sb, Sc, Sd, and Se loci for indica-japonica hybrid sterility. (B) Hybrid of indica/japonica is sterile, which is caused by the interaction between S-i and S-j at the S5, Sa, Sb, Sc, Sd, and Se loci. (C) Hybrid of indica/ICJL is fertile due to ICJL carrying S-i at the S5, Sa, Sb, Sc, Sd, and Se loci. (D) Hybrid of WCIL/japonica is fertile due to WCIL carrying S-n at the S5, Sa, Sb, Sc, Sd, and Se loci. ICJL, indica-compatible japonica line; WCIL, wide-compatible indica line.