Dominance between self-incompatibility alleles determines the mating system of Capsella allopolyploids
Tianlin Duan,
Zebin Zhang,
Mathieu Genete
et al.
Abstract:The shift from outcrossing to self-fertilization is one of the main evolutionary transitions in plants and has broad effects on evolutionary trajectories. In Brassicaceae, the ability to inhibit self-fertilization is controlled by 2 genes, SCR and SRK, tightly linked within the S-locus. A series of small non-coding RNAs also encoded within the S-locus regulates the transcriptional activity of SCR alleles, resulting in a linear dominance hierarchy between them. In Brassicaceae, natural allopolyploid species are… Show more
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