A5032086005- Plant Reproductive Biology
- Chromosomal and Genetic Variations
- Genetic and Clinical Aspects of Sex Determination and Chromosomal Abnormalities
- Genetic diversity and population structure
- Plant and animal studies
- Yeasts and Rust Fungi Studies
- Forest Insect Ecology and Management
- Bryophyte Studies and Records
- Plant Pathogens and Fungal Diseases
University of Toronto
2021-2024
University of Alberta
2017
Abstract Y chromosomes are thought to undergo progressive degeneration due stepwise loss of recombination and subsequent reduction in selection efficiency. However, the timescales evolutionary forces driving remain unclear. To investigate evolution sex on multiple timescales, we generated a high-quality phased genome assembly massive older (<10 MYA) neo (<200,000 yr) XYY cytotype dioecious plant Rumex hastatulus hermaphroditic outgroup salicifolius. Our assemblies, supported by...
There is growing evidence from diverse taxa for sex differences in the genomic landscape of recombination, but causes and consequences these remain poorly understood. Strong recombination dimorphism between sexes could have important implications dynamics chromosome evolution because low heterogametic can favour spread sexually antagonistic alleles. Here, we present a sex-specific linkage map revised genome assembly Rumex hastatulus provide first characterization dioecious plant. We data on...
Mountain pine beetle (Dendroctonus ponderosae Hopkins; MPB) is an economically and ecologically important pest of species in western North America. beetles form complex multipartite relationships with microbial partners, including the ophiostomoid fungi Grosmannia clavigera (Robinson-Jeffrey Davidson) Zipfel, de Beer Wingfield, Ophiostoma montium (Rumbold) von Arx, aurea Leptographium longiclavatum (Lee, Kim, Breuil) terebrantis (Barras Perry). These are vectored by MPB to new hosts, where...
Abstract The maintenance of genetic variation by balancing selection is considerable interest to evolutionary biologists. An important but understudied potential driver antagonistic pleiotropy between diploid and haploid stages the plant life cycle. Despite sharing a common genome, sporophytes (2n) gametophytes (n) may undergo differential or even opposing selection. Theoretical work suggests can generate maintain variation. for far-reaching consequences gametophytic selection, empirical...
Abstract Y chromosomes are thought to undergo progressive degeneration due stepwise loss of recombination and subsequent reduction in selection efficiency. However, the timescales evolutionary forces driving remain unclear. To investigate evolution sex on multiple timescales, we generated a high-quality phased genome assembly massive older (<10MYA) neo (<200,000 years) XYY cytotype dioecious plant Rumex hastatulus hermaphroditic outgroup R. salicifolius . Our assemblies, supported by...
Abstract Sex chromosomes have evolved independently many times across eukaryotes. Despite a considerable body of literature on the evolution sex chromosomes, causes and consequences variation in formation, degeneration, turnover remain poorly understood. Comparative approaches groups with sexual system can be valuable for understanding these questions. Plants are well-suited to such comparative studies, lineages containing relatively recent origins dioecy as well hermaphroditic close...
Abstract Sex chromosomes have evolved independently many times across eukaryotes. Despite a considerable body of literature on sex chromosome evolution, the causes and consequences variation in their formation, degeneration, turnover remain poorly understood. Chromosomal rearrangements are thought to play an important role these processes by promoting or extending suppression recombination chromosomes. may also contribute barriers gene flow, limiting introgression among species. Comparative...
Summary There is growing evidence across diverse taxa for sex differences in the genomic landscape of recombination, but causes and consequences these remain poorly understood. Strong recombination dimorphism between sexes could have important implications dynamics chromosome evolution turnover because low heterogametic can help favour spread sexually antagonistic alleles. Here, we present a sex-specific linkage map revised genome assembly Rumex hastatulus , representing first...