Patterns of recurrent evolution and geographic parthenogenesis within apomictic polyploid Easter daises (Townsendia hookeri).

doi:10.1111/j.1365-294X.2006.03020.x

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Article

Patterns of recurrent evolution and geographic parthenogenesis within apomictic polyploid Easter daises (Townsendia hookeri).

Molecular ecology - 1 Oct 2006

Thompson Stacey Lee, Whitton Jeannette

Abstract excerpt

Geographic patterns of parthenogenesis and the number of transitions from sexual diploidy to asexual (apomictic) autopolyploidy were examined for 40 populations of the Easter daisy, Townsendia hookeri. Analyses of pollen diameter and stainability characterized 15 sexual diploid and 25 apomictic polyploid populations from throughout the plant's western North American range. Sexual diploids were restricted to two...

Topics

Asteraceae
Colorado
DNA, Chloroplast
Ecosystem
Evolution, Molecular
Genetic Variation
Introns
NADH Dehydrogenase
Parthenogenesis
Phylogeny
Plant Leaves
Plant Proteins
Pollen
Polymerase Chain Reaction
Polyploidy
Sequence Alignment
Sequence Analysis, DNA
Wisconsin

Source

Open in PubMed

Identifiers

PMID: 16968277
DOI: 10.1111/j.1365-294X.2006.03020.x

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