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The Genomic Selfing Syndrome Accompanies the Evolutionary Breakdown of Heterostyly
Wang,Xin-Jia; Barrett,Spencer C. H.; Zhong,Li; Wu,Zhi-Kun; Li,De-Zhu; Wang,Hong; Zhou,Wei
2021
Source PublicationMOLECULAR BIOLOGY AND EVOLUTION
ISSN0737-4038
Volume38Issue:1Pages:168-180
AbstractThe evolutionary transition from outcrossing to selfing can have important genomic consequences. Decreased effective population size and the reduced efficacy of selection are predicted to play an important role in the molecular evolution of the genomes of selfing species. We investigated evidence for molecular signatures of the genomic selfing syndrome using 66 species of Primula including distylous (outcrossing) and derived homostylous (selfing) taxa. We complemented our comparative analysis with a microevolutionary study of P. chungensis, which is polymorphic for mating system and consists of both distylous and homostylous populations. We generated chloroplast and nuclear genomic data sets for distylous, homostylous, and distylous-homostylous species and identified patterns of nonsynonymous to synonymous divergence (d(N)/d(S)) and polymorphism (pi(N)/pi(S)) in species or lineages with contrasting mating systems. Our analysis of coding sequence divergence and polymorphism detected strongly reduced genetic diversity and heterozygosity, decreased efficacy of purifying selection, purging of large-effect deleterious mutations, and lower rates of adaptive evolution in samples from homostylous compared with distylous populations, consistent with theoretical expectations of the genomic selfing syndrome. Our results demonstrate that self-fertilization is a major driver of molecular evolutionary processes with genomic signatures of selfing evident in both old and relatively young homostylous populations.
Keyworddeleterious mutations effective population size mating system Primula selection efficacy ADAPTIVE MOLECULAR EVOLUTION MATING SYSTEM BREEDING SYSTEMS DELETERIOUS MUTATIONS PURIFYING SELECTION POPULATION-SIZE LINKAGE DISEQUILIBRIUM INBREEDING DEPRESSION PHYLOGENETIC ANALYSES BACKGROUND SELECTION
DOI10.1093/molbev/msaa199
WOS IDWOS:000609977100014
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Document Type期刊论文
Identifierhttp://ir.kib.ac.cn/handle/151853/73258
Collection中国科学院昆明植物研究所
Affiliation1.[Wang, Xin-Jia
2.Zhong, Li
3.Li, De-Zhu
4.Wang, Hong
5.Chinese Acad Sci, Kunming Inst Bot, CAS Key Lab Plant Divers & Biogeog East Asia, Kunming, Yunnan, Peoples R China
6.Chinese Acad Sci, Plant Germplasm & Genom Ctr, Kunming Inst Bot, Germplasm Bank Wild Species, Kunming, Yunnan, Peoples R China
7.Univ Chinese Acad Sci, Beijing, Peoples R China
8.[Barrett, Spencer C. H.] Univ Toronto, Dept Ecol & Evolutionary Biol, Toronto, ON, Canada
9.Guizhou Univ Tradit Chinese Med, Dept Pharm, Guiyang, Guizhou, Peoples R China
Recommended Citation
GB/T 7714
Wang,Xin-Jia,Barrett,Spencer C. H.,Zhong,Li,et al. The Genomic Selfing Syndrome Accompanies the Evolutionary Breakdown of Heterostyly[J]. MOLECULAR BIOLOGY AND EVOLUTION,2021,38(1):168-180.
APA Wang,Xin-Jia.,Barrett,Spencer C. H..,Zhong,Li.,Wu,Zhi-Kun.,Li,De-Zhu.,...&Zhou,Wei.(2021).The Genomic Selfing Syndrome Accompanies the Evolutionary Breakdown of Heterostyly.MOLECULAR BIOLOGY AND EVOLUTION,38(1),168-180.
MLA Wang,Xin-Jia,et al."The Genomic Selfing Syndrome Accompanies the Evolutionary Breakdown of Heterostyly".MOLECULAR BIOLOGY AND EVOLUTION 38.1(2021):168-180.
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