The genetic mechanisms of reproductive isolation have been widely investigated within Asian cultivated rice (); however, relevant genes between diverged species have been in sighted rather less. Herein, a gene showing selfish behavior was discovered in hybrids between the distantly related rice species and . The selfish allele in the locus impaired male fertility, discriminately eliminating pollens containing the allele from in heterozygotes (/). Genetic analysis revealed that a gene encoding a chromatin-remodeling factor (CHR) is involved in this phenomenon and a variety of owns the truncated gene , whereas its homologue has a complete structure in . CRISPR-Cas9-mediated loss of function mutants restored fertility in hybrids. African cultivated rice, which naturally lacks the homologue, is compatible with both and carriers. These results suggest that is a Killer gene, which leads to reproductive isolation.
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| http://dx.doi.org/10.1016/j.isci.2024.109761 | DOI Listing |
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