Hybrid speciation accompanied by genomic reorganization in wild sunflowers
Article Abstract:
Comparative linkage mapping is used to show the extensive genomic reorganization in Helianthus anomalus in relation to parents Helianthus annuus and Helianthus petiolaris. The highly detailed linkage maps show that rapid karyotypic evolution in wild sunflowers are caused by the combination of parents' structural differences and the chromosomal rearrangements that are caused by recombination. The wild sunflower's parental genomic structure is found to influence hybrid genomic composition by protecting the linkage blocks from recombination during speciation.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1995
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High outcrossing rates maintain male and hermaphrodite individuals in populations of the flowering plant Datisca glomerata
Article Abstract:
Two androdioecious populations of the plant Datisca glomerata (D. glomerata) exhibited high outcrossing rates ranging from 65 to 92% when tested with random amplified polymorphic DNA markers. D. glomerata is the only plant characterized by androdioecy or the existence of male and hermaphrodite individuals in a breeding population. The high outcrossing rates support the theory that D. glomerata's androdioecy is a product of evolution.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1992
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Origin of extant domesticated sunflowers in eastern North America
Article Abstract:
Description of the genetic relationships and pattern of genetic drift between extant domesticated strains and wild populations of sunflowers collected from throughout the USA and Mexico is presented using model-based methods. It is shown that extant domesticates arose in eastern North America, with a substantial genetic bottleneck occurring during domestication.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2004
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