Genomic conflicts that cause pollen mortality and raise reproductive barriers in Arabidopsis thaliana
| Autor: | Matthieu Simon, Nicolas Gobron, Christine Camilleri, Françoise Budar, Lucy Botran, Stéphanie Durand, Natacha Pluta, Anthony Ricou |
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| Přispěvatelé: | Institut Jean-Pierre Bourgin (IJPB), Institut National de la Recherche Agronomique (INRA)-AgroParisTech, Université Paris-Sud - Paris 11 (UP11), Labex SPS (Saclay Plant Scince) [ANR-10-LABX-0040-SPS], ANR-10-LABX-0040,SPS,Saclay Plant Sciences(2010), AgroParisTech-Université Paris-Saclay-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) |
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
0301 basic medicine
Cytoplasm cytoplasmic male sterility Plant Infertility Reproductive Isolation stérilité mâle cytoplasmique Genetic Linkage Sterility [SDV]Life Sciences [q-bio] Quantitative Trait Loci Arabidopsis Genomics Investigations Biology medicine.disease_cause Chromosomes Plant Intraspecific competition hybrid sterility [SDV.BDLR.RS]Life Sciences [q-bio]/Reproductive Biology/Sexual reproduction 03 medical and health sciences Pollen Genetics medicine reproductive barrier Arabidopsis thaliana segregation distorsion ComputingMilieux_MISCELLANEOUS Hybrid barrière reproductive Cytoplasmic male sterility arabidopsis thaliana food and beverages Reproductive isolation biology.organism_classification Biological Evolution 030104 developmental biology pollen killer pollen Hybridization Genetic |
| Zdroj: | Genetics Genetics, Genetics Society of America, 2016, 203 (3), pp.1353-1367. ⟨10.1534/genetics.115.183707⟩ |
| ISSN: | 0016-6731 |
| Popis: | Species differentiation and the underlying genetics of reproductive isolation are central topics in evolutionary biology. Hybrid sterility is one kind of reproductive barrier that can lead to differentiation between species. Here, we analyze the complex genetic basis of the intraspecific hybrid male sterility that occurs in the offspring of two distant natural strains of Arabidopsis thaliana, Shahdara and Mr-0, with Shahdara as the female parent. Using both classical and quantitative genetic approaches as well as cytological observation of pollen viability, we demonstrate that this particular hybrid sterility results from two causes of pollen mortality. First, the Shahdara cytoplasm induces gametophytic cytoplasmic male sterility (CMS) controlled by several nuclear loci. Second, several segregation distorters leading to allele-specific pollen abortion (pollen killers) operate in hybrids with either cytoplasm. The complete sterility of the hybrid with the Shahdara cytoplasm results from the genetic linkage of the two causes of pollen mortality, i.e., CMS nuclear determinants and pollen killers. Furthermore, natural variation at these loci in A. thaliana is associated with different male-sterility phenotypes in intraspecific hybrids. Our results suggest that the genomic conflicts that underlie segregation distorters and CMS can concurrently lead to reproductive barriers between distant strains within a species. This study provides a new framework for identifying molecular mechanisms and the evolutionary history of loci that contribute to reproductive isolation, and possibly to speciation. It also suggests that two types of genomic conflicts, CMS and segregation distorters, may coevolve in natural populations. |
| Databáze: | OpenAIRE |
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