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Genetic Causes and ...
Genetic Causes and Genomic Consequences of Breakdown of Distyly in Linum trigynum
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- Gutiérrez-Valencia, Juanita, 1991- (author)
- Stockholms universitet,Institutionen för ekologi, miljö och botanik,Science for Life Laboratory (SciLifeLab)
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- Zervakis, Panagiotis-Ioannis (author)
- Stockholms universitet,Institutionen för ekologi, miljö och botanik,Science for Life Laboratory (SciLifeLab)
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- Postel, Zoé, 1995- (author)
- Stockholms universitet,Institutionen för ekologi, miljö och botanik,Science for Life Laboratory (SciLifeLab)
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- Fracassetti, Marco (author)
- Stockholms universitet,Science for Life Laboratory (SciLifeLab),Institutionen för ekologi, miljö och botanik
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- Losvik, Aleksandra, 1985- (author)
- Stockholms universitet,Institutionen för ekologi, miljö och botanik,Science for Life Laboratory (SciLifeLab)
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- Mehrabi, Sara, 1982- (author)
- Stockholms universitet,Institutionen för ekologi, miljö och botanik,Science for Life Laboratory (SciLifeLab)
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Bunikis, Ignas (author)
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Soler, Lucile (author)
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- Hughes, P. William (author)
- Stockholms universitet,Institutionen för ekologi, miljö och botanik,Science for Life Laboratory (SciLifeLab)
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- Désamoré, Aurélie (author)
- Stockholms universitet,Institutionen för ekologi, miljö och botanik,Science for Life Laboratory (SciLifeLab)
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- Laenen, Benjamin (author)
- Stockholms universitet,Institutionen för ekologi, miljö och botanik,Science for Life Laboratory (SciLifeLab)
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Abdelaziz, Mohamed (author)
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Pettersson, Olga Vinnere (author)
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Arroyo, Juan (author)
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- Slotte, Tanja (author)
- Stockholms universitet,Institutionen för ekologi, miljö och botanik,Science for Life Laboratory (SciLifeLab)
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(creator_code:org_t)
- 2024
- 2024
- English.
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In: Molecular biology and evolution. - 0737-4038 .- 1537-1719. ; 41:5
- Related links:
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https://doi.org/10.1...
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https://urn.kb.se/re...
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Abstract
Subject headings
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- 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 in flowers, often coupled with heteromorphic self-incompatibility. Distyly has evolved convergently in multiple flowering plant lineages, but has also broken down repeatedly, often resulting in homostylous, self-compatible populations with elevated rates of self-fertilization. Here, we aimed to study the genetic causes and genomic consequences of the shift to homostyly in Linum trigynum, which is closely related to distylous Linum tenue. Building on a high-quality genome assembly, we show that L. trigynum harbors a genomic region homologous to the dominant haplotype of the distyly supergene conferring long stamens and short styles in L. tenue, suggesting that loss of distyly first occurred in a short-styled individual. In contrast to homostylous Primula and Fagopyrum, L. trigynum harbors no fixed loss-of-function mutations in coding sequences of S-linked distyly candidate genes. Instead, floral gene expression analyses and controlled crosses suggest that mutations downregulating the S-linked LtWDR-44 candidate gene for male self-incompatibility and/or anther height could underlie homostyly and self-compatibility in L. trigynum. Population genomic analyses of 224 whole-genome sequences further demonstrate that L. trigynum is highly self-fertilizing, exhibits significantly lower genetic diversity genome-wide, and is experiencing relaxed purifying selection and less frequent positive selection on nonsynonymous mutations relative to L. tenue. Our analyses shed light on the loss of distyly in L. trigynum, and advance our understanding of a common evolutionary transition in flowering plants.
Subject headings
- NATURVETENSKAP -- Biologi -- Genetik (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Genetics (hsv//eng)
Keyword
- homostyly
- self-fertilization
- distribution of fitness effects
- genome assembly
- plant mating system
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Gutiérrez-Valenc ...
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Zervakis, Panagi ...
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Postel, Zoé, 199 ...
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Fracassetti, Mar ...
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Losvik, Aleksand ...
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Mehrabi, Sara, 1 ...
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Bunikis, Ignas
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Soler, Lucile
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Hughes, P. Willi ...
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Désamoré, Auréli ...
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Laenen, Benjamin
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Abdelaziz, Moham ...
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Pettersson, Olga ...
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Arroyo, Juan
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Slotte, Tanja
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- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Biological Scien ...
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and Genetics
- Articles in the publication
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Molecular biolog ...
- By the university
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Stockholm University