Genomic analyses elucidate the causes and consequences of breakdown of distyly inLinum trigynum DOI Creative Commons
Juanita Gutiérrez‐Valencia, Panagiotis‐Ioannis Zervakis, Zoé Postel

et al.

bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2023, Volume and Issue: unknown

Published: Nov. 17, 2023

Abstract Distyly is an iconic floral polymorphism governed by a supergene, which promotes efficient pollen transfer and outcrossing through reciprocal differences in the position of sexual organs flowers, often coupled with heteromorphic self-incompatibility (SI). has evolved convergently multiple flowering plant lineages, but also broken down repeatedly, resulting homostylous, self-compatible populations elevated rates self-fertilization. Here, we aimed to study genetic causes genomic consequences shift homostyly Linum trigynum , closely related distylous tenue. Building on high-quality genome assembly, show that L. harbors region homologous dominant haplotype distyly supergene conferring long stamens short styles tenue suggesting loss first occurred short-styled individual. In contrast homostylous Primula Fagopyrum no fixed loss-of-function mutations coding sequences S- linked candidate genes. Instead, gene expression analyses controlled crosses suggest downregulating LtWDR-44 for male SI and/or anther height could underlie self-compatibility (SC) . Population 224 whole-genome further demonstrate highly self-fertilizing, exhibits significantly lower diversity genome-wide, experiencing relaxed purifying selection less frequent positive nonsynonymous relative Our shed light advance our understanding common evolutionary transition plants.

Language: Английский

Cell elongation and altered phytohormone levels play a role in establishing distyly in Averrhoa carambola DOI

Wubaiyu Lin,

Qin Si,

Siyu Chen

et al.

Gene, Journal Year: 2024, Volume and Issue: 939, P. 149167 - 149167

Published: Dec. 15, 2024

Language: Английский

Citations

0
Genomic evidence for supergene control of Darwin′s 'complex marriage arrangement' – the tristylous floral polymorphism DOI Creative Commons
Haoran Xue, Yunchen Gong, Stephen Wright

et al.

bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2024, Volume and Issue: unknown

Published: Jan. 17, 2024

Tristyly is a sexual polymorphism characterized by three flower morphs with reciprocal stigma and anther heights controlled two epistatically interacting diallelic loci (S M), hypothesized to be supergenes. Chromosome-level genome assemblies of Eichhornia paniculata identified the S- M-loci. The S-locus supergene consisting divergent alleles: S-allele (2.51 Mb), specific genes hemizygous in most S-morph plants s-allele (596 kb) five genes. Two genes, LAZY1-S HRGP-S, were specifically expressed styles stamens, respectively, making them tristyly candidate M-locus contains one gene (LAZY1-M) present M-allele but absent from m-allele which homologous LAZY1-S. Estimates allele age are consistent theory predicting that evolved before M-locus. Re-use same family highlights potential role duplication evolution epistatic multilocus polymorphisms.

Language: Английский

Citations

0
ThePrimula edelbergii S-locus is an example of a jumping supergene DOI Open Access
Giacomo Potente, Narjes Yousefi, Barbara Keller

et al.

bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2024, Volume and Issue: unknown

Published: Jan. 31, 2024

Abstract Research on supergenes, non-recombining genomic regions housing tightly linked genes that control complex phenotypes, has gained prominence in genomics, with supergenes having been described most eukaryotic lineages. Heterostyly, a floral heteromorphism promoting outcrossing several angiosperm families, is controlled by the S -locus supergene. Historically, studied primarily closely related Primula species and, more recently, other groups independently evolved heterostyly. However, it remains unknown whether genetic architecture and composition of are maintained among share common origin heterostyly subsequently diverged across larger time scales. To address this research gap, we present chromosome-scale genome assembly edelbergii , shares same veris (whose characterized) but from ca. 18 million years ago. Comparative analyses between P. allowed us to show, for first time, can ‘jump’ (i.e. translocate) chromosomes. Additionally, found four were reshuffled within supergene, seemingly without affecting their expression. Furthermore, confirmed hemizygosity counteracts degeneration, otherwise expected supergenes. Finally, investigated evolutionary history Ericales terms whole duplications transposable element accumulation. In summary, our work provides valuable resource comparative aimed at investigating genetics pivotal role shaping evolution phenotypes.

Language: Английский

Citations

0
Genomic analyses elucidate the causes and consequences of breakdown of distyly inLinum trigynum DOI Creative Commons
Juanita Gutiérrez‐Valencia, Panagiotis‐Ioannis Zervakis, Zoé Postel

et al.

bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2023, Volume and Issue: unknown

Published: Nov. 17, 2023

Abstract Distyly is an iconic floral polymorphism governed by a supergene, which promotes efficient pollen transfer and outcrossing through reciprocal differences in the position of sexual organs flowers, often coupled with heteromorphic self-incompatibility (SI). has evolved convergently multiple flowering plant lineages, but also broken down repeatedly, resulting homostylous, self-compatible populations elevated rates self-fertilization. Here, we aimed to study genetic causes genomic consequences shift homostyly Linum trigynum , closely related distylous tenue. Building on high-quality genome assembly, show that L. harbors region homologous dominant haplotype distyly supergene conferring long stamens short styles tenue suggesting loss first occurred short-styled individual. In contrast homostylous Primula Fagopyrum no fixed loss-of-function mutations coding sequences S- linked candidate genes. Instead, gene expression analyses controlled crosses suggest downregulating LtWDR-44 for male SI and/or anther height could underlie self-compatibility (SC) . Population 224 whole-genome further demonstrate highly self-fertilizing, exhibits significantly lower diversity genome-wide, experiencing relaxed purifying selection less frequent positive nonsynonymous relative Our shed light advance our understanding common evolutionary transition plants.

Language: Английский

Citations

0