Life Sciences Commons^™

Reproductive Success Through High Pollinator Visitation Rates Despite Self Incompatibility In An Endangered Wallflower, Miranda K. Melen, Julie A. Herman, Jessica Lucas, Rachel E. O’Malley, Ingrid M. Parker, Aaron M. Thom, Justen B. Whittall

Biology

PREMISE OF THE STUDY: Self incompatibility (SI) in rare plants presents a unique challenge—SI protects plants from inbreeding depression, but requires a sufficient number of mates and xenogamous pollination. Does SI persist in an endangered polyploid? Is pollinator visitation sufficient to ensure reproductive success? Is there evidence of inbreeding/outbreeding depression? We characterized the mating system, primary pollinators, pollen limitation, and inbreeding/outbreeding depression in Erysimum teretifolium to guide conservation efforts.

METHODS: We compared seed production following self pollination and within- and between-population crosses. Pollen tubes were visualized after self pollinations and between-population pollinations. Pollen limitation was tested in the field. Pollinator …

Population Structure, Genetic Diversity, Geographic Distribution, And Morphology Of Two Boechera (Brassicaceae) Parental Species (Boechera Thompsonii And Boechera Formosa) And Of Their Resultant Hybrid Boechera Duchesnensis, Christina Elizabeth Fox Call

Theses and Dissertations

Background: Over the relatively short period of its evolutionary history, Boechera (Brassicaceae) has undergone rapid radiation that has produced 70+ morphologically distinct, sexual diploids. However, reproductive isolation has moved more slowly than morphological divergence in this group and the diploids appear to hybridize frequently where they coexist. Boechera duchesnensis appears to be the result of hybridization between its putative parents Boechera thompsonii and Boechera formosa. Objectives: The objectives of this study are to (i) analyze and document genetic diversity patterns in the population structure, - including allelic and heterozygosity frequencies - of B. thompsonii and B. formosa …

Study Of Phylogenetic Relationship Of Turkish Species Ofmatthiola (Brassicaceae) Based On Issr Amplification, Beki̇r Doğan, Mustafa Çeli̇k, Murat Ünal, Abdurrahman Sefali, Esra Marti̇n, Ayla Kaya

Turkish Journal of Botany

Matthiola W.T.Aiton is a taxonomically complex genus in which there are many problems, mostly with Matthiola longipetala and M. Odoratissima. Matthiola species native to Turkey were collected from various locations in Anatolia, and their DNA was isolated. Revision studies performed on the basis of molecular data obtained from studies conducted in recent years have made the phylogenetic relationships and systematic positions of the taxa more apparent and reliable. Consequently, the remaining taxonomic problems among the species have been resolved through the use of DNA-based molecular analysis methods, which, unlike phenotype studies, are not affected by environmental factors. The inter-simple sequence …

New Natural Weed Host Raphanus Raphanistrum L. (Brassicaceae) For Beet Necrotic Yellow Vein Virus And Its Vector Polymyxa Betae Keskin, Nazli Di̇de Kutluk Yilmaz, Emi̇ne Kaya Altop, Colin James Phillippo, Hüsrev Mennan

Turkish Journal of Agriculture and Forestry

Rhizomania is an important virus disease of sugar beet (Beta vulgaris) caused by Beet necrotic yellow vein virus (BNYVV). The virus is transmitted to the roots of host plants by the plasmodiophorid Polymyxa betae. During survey studies in September and October 2009, yellow vein banding symptoms were observed on wild radish (Raphanus raphanistrum) plants growing in spinach (Spinacia oleracea) fields with a history of rhizomania in Samsun Province in the Black Sea Region of Turkey. To verify possible alternative hosts for BNYVV and P. Betae, R. Raphanistrum and spinach plants and soil samples were collected. BNYVV was detected in the …