Richard Noyes - Assistant Professor, Curator of UCAC Herbarium

Phone: 501-450-5926 (Office)
Address: 201 Donaghey Avenue I LSC 180 I Conway AR 72035


UCA: Biology

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Research Areas/Expertise:
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Research Summary | Selected Publications | Lab Members | Key Collaborators | Research Projects | Links

Research Summary:

I am an evolutionary biologist interested in explaining patterns of diversity in flowering plants. My research focuses on understanding the biology and evolution of apomixis, which is a unique form of reproduction by which plants make clones of themselves through seed. Apomixis is widespread in plants but our knowledge of the origin and evolution of the trait is poor. There is broad interest in improving our understanding of apomixis in order to facilitate agronomics, comprehend better wildtype sexual reproduction, and to elucidate processes of diversification in apomictic plant groups.

My study system is the common daisy fleabane, Erigeron annuus, which forms a diverse species complex in eastern North America. Specifically, I use molecular markers and gene sequence variation to investigate 1) the genetic architecture and inheritance of apomixis, 2) the relationship between sexual and apomictic populations, 3) spread of apomixis genes in sexual x apomictic hybrid zones.


Selected Publications:

1. Noyes, R.D., R. Baker, and B. Mai. [In review] Mendelian segregation for two-factor apomixis in Erigeron annuus (Asteraceae). Heredity. [PDF]  

2. Noyes, R. D. [In press]. Reticulation and the evolution of apomixis in Erigeron sect. Phalacroloma (Asteraceae) In: Hörandl, E., Grossniklaus, U., Van Dijk, P., Sharbel, T. (eds.), Apomixis: Evolution, Mechanisms and Perspectives. Regnum Vegetabile 147. (Gantner Verlag, Ruggell, Liechtenstein) [PDF]  

3. Noyes, R.D., H. Gerling, and C. Vandervoort. [In Press]. Sexual and apomictic prairie fleabane (Erigeron strigosus Muhl. ex Willd.) in Texas: Geographic analysis and a new combination (Erigeron strigosus var. traversii). Sida. [PDF]  

4. Noyes, R.D. 2006. Apomixis via recombination of genome regions for apomeiosis (diplospory) and parthenogenesis in Erigeron (daisy fleabane, Asteraceae). Sexual Plant Reproduction 19: 7-18 [PDF]

5. Noyes, R. D. 2006. Intraspecific nuclear ribosomal DNA divergence and reticulation in sexual diploid Erigeron strigosus (Asteraceae). American Journal of Botany 93: 470-479. [PDF]

6. Noyes, R.D. and J. R. Allison. 2005. Cytology, ovule development, and pollen quality in sexual Erigeron strigosus (Asteraceae). International Journal of Plant Sciences 166: 49-59. [PDF]

Lab Members:

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Key Collaborators

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Research Projects

I use an evolutionary genetic approach that combines genetic, phylogenetic, and geographic analyses to produce a detailed evolutionary portrait of apomixis in natural populations. My research focuses on the evolutionary genetics of apomixis in Erigeron annuus and E. strigosus (sunflower family — Asteraceae). These plants are annuals, which makes them ideal for crosses and experiments. My goal is to understand the evolutionary history of the gene regions linked to apomixis, and to study their dynamics in nature. To that end, I use: 1) crosses and genetic mapping to explore the genetic architecture and inheritance of apomixis, 2) analyses of gene sequence variation to investigate the phylogenetic relationships among sexual diploid and apomictic polyploid populations, and, 3) geographical analysis to explore the ecology of asexual vs. sexual reproduction.