Publication Type: | Journal Article |
Year of Publication: | 2012 |
Authors: | Toneatto, F, Hauser, TP, Nielsen, JKvist, ØRGAARD, MARIAN |
Journal: | Nordic Journal of Botany |
Volume: | 30 |
Issue: | 4 |
Date Published: | 2012 |
ISBN Number: | 1756-1051 |
Keywords: | Barbarea, Brassicaceae |
Abstract: | Two subspecies of Barbarea vulgaris are taxonomically recognized as ssp. vulgaris and ssp. arcuata. In addition, two types of Barbarea vulgaris ssp. arcuata occurs in Denmark. The G-type is resistant to an herbivorous flea beetle (Phyllotreta nemorum) whereas the P-type is susceptible. A previous study suggested that the P-type evolved by a loss of resistance from a resistant progenitor. We analyzed the genetic relatedness among eight Barbarea taxa: B. vulgaris spp. vulgaris, B. vulgaris ssp. arcuata G- and P-types, hybrids between the types, B. verna, B. intermedia, B. stricta, B. orthoceras and B. australis, using AFLP and SSR markers. A clear distinction between the G- and P-types was revealed. Both were distinct from B. vulgaris ssp. vulgaris, the G-type less so than the P-type. Barbarea verna and B. intermedia formed unambiguous clusters, whereas the remaining taxa produced less discrete groupings. Possible evolutionary scenarios for flea-beetle resistance and susceptibility are discussed, including lineage sorting from a polymorphic ancestral population, and de novo loss of resistance in the P-type of B. vulgaris ssp. arcuata. |
URL: | http://dx.doi.org/10.1111/j.1756-1051.2012.01546.x |
Short Title: | Nordic Journal of Botany |
Genetic diversity and similarity in the Barbarea vulgaris complex (Brassicaceae)
Taxonomic name: