Dominance between self-incompatibility alleles determines the mating system of Capsella allopolyploids DOI Creative Commons
Tianlin Duan, Zebin Zhang, Mathieu Genête

et al.

Evolution Letters, Journal Year: 2024, Volume and Issue: 8(4), P. 550 - 560

Published: March 17, 2024

Abstract The shift from outcrossing to self-fertilization is one of the main evolutionary transitions in plants and has broad effects on trajectories. In Brassicaceae, ability inhibit controlled by 2 genes, SCR SRK, tightly linked within S-locus. A series small non-coding RNAs also encoded S-locus regulates transcriptional activity alleles, resulting a linear dominance hierarchy between them. natural allopolyploid species are often self-compatible (SC) even when progenitor self-incompatible, but reason why polyploid lineages tend lose self-incompatibility (SI) timing loss SI (immediately after ancestral hybridization species, or at later stage formation lineages) have generally remained elusive. We used synthetic diploid tetraploid hybrids obtained self-fertilizing Capsella orientalis grandiflora test whether breakdown could be observed immediately hybridization, occurrence SC phenotypes explained interactions S-haplotypes inherited parental lineages. RNA-sequencing data young inflorescences measure allele-specific expression gene infer hybrids. then evaluated seed set autonomous self-pollination Our results demonstrate that self-compatibility depends relative S-alleles confirming can lost instantaneously upon lineage. They confirm epigenetic regulation controls function subgenomes allopolyploids. Together, our illustrate how detailed knowledge mechanisms controlling illuminate understanding patterns co-variation mating system changes ploidy.

Language: Английский

Dominance between self-incompatibility alleles determines the mating system of Capsella allopolyploids DOI Creative Commons
Tianlin Duan, Zebin Zhang, Mathieu Genête

et al.

Evolution Letters, Journal Year: 2024, Volume and Issue: 8(4), P. 550 - 560

Published: March 17, 2024

Abstract The shift from outcrossing to self-fertilization is one of the main evolutionary transitions in plants and has broad effects on trajectories. In Brassicaceae, ability inhibit controlled by 2 genes, SCR SRK, tightly linked within S-locus. A series small non-coding RNAs also encoded S-locus regulates transcriptional activity alleles, resulting a linear dominance hierarchy between them. natural allopolyploid species are often self-compatible (SC) even when progenitor self-incompatible, but reason why polyploid lineages tend lose self-incompatibility (SI) timing loss SI (immediately after ancestral hybridization species, or at later stage formation lineages) have generally remained elusive. We used synthetic diploid tetraploid hybrids obtained self-fertilizing Capsella orientalis grandiflora test whether breakdown could be observed immediately hybridization, occurrence SC phenotypes explained interactions S-haplotypes inherited parental lineages. RNA-sequencing data young inflorescences measure allele-specific expression gene infer hybrids. then evaluated seed set autonomous self-pollination Our results demonstrate that self-compatibility depends relative S-alleles confirming can lost instantaneously upon lineage. They confirm epigenetic regulation controls function subgenomes allopolyploids. Together, our illustrate how detailed knowledge mechanisms controlling illuminate understanding patterns co-variation mating system changes ploidy.

Language: Английский

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