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Stratified analysis of the soil seed bank in the cedar glade endemic Astragalus bibullatus: evidence for historical changes in genetic structure.
Persistent seed banks may provide information on historical changes in the genetic composition of populations. We used stratified sampling of the soil seed bank of Astragalus bibullatus (Pyne'sExpand
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Reproductive interactions between hybridizing irises: analyses of pollen‐tube growth and fertilization success
Pollen-tube growth and seed siring ability were measured in crosses between the Louisiana iris species Iris fulva and Iris hexagona and their F1 and F2 hybrids. Flowers of the parental species wereExpand
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Phytogeography of Rare Plant Species Endemic to the Southeastern United States
A database of the county distribution of rare vascular plant species endemic to the southeastern United States was compiled in order to review geographic trends. A total of 482 species representingExpand
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Evidence for multiple sources of invasion and intraspecific hybridization in Brachypodium sylvaticum (Hudson) Beauv. in North America
We compared the levels and distribution of genetic diversity in Eurasian and North American populations of Brachypodium sylvaticum (Huds.) Beauv. (false brome), a newly invasive perennial bunchgrassExpand
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ECOLOGICAL AND GENETIC ASSOCIATIONS IN AN IRIS HYBRID ZONE
Chloroplast DNA (cpDNA) markers and 12 nuclear (random amplified polymorphic DNA, or RAPD) markers were used to examine the distribution of genetic variation among individuals and the genetic andExpand
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Contributions of Heterosis and Epistasis to Hybrid Fitness
Early‐generation hybrid fitness is difficult to interpret because heterosis can obscure the effects of hybrid breakdown. We used controlled reciprocal crosses and common garden experiments toExpand
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VARIATION IN POLLEN SIZE, FERTILIZATION ABILITY, AND POSTFERTILIZATION SIRING ABILITY IN ERYTHRONIUM GRANDIFLORUM
  • M. B. Cruzan
  • Biology, Medicine
  • Evolution; international journal of organic…
  • 1 July 1990
The mean volume of pollen grains and total pollen production varied both within and among plants of Erythronium grandiflorum. The second flowers of two‐flowered plants tended to produce smaller andExpand
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Unilateral incompatibility and the effects of interspecific pollination for Erythronium americanum and Erythronium albidum (Liliaceae)
To determine whether interspecific pollen transfer could reduce seed production by two sympatric lilies, Erythronium albidum and Erythronium americanum, we hand-pollinated flowers with mixtures of ...
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POLLEN‐POLLEN AND POLLEN‐STYLE INTERACTIONS DURING POLLEN TUBE GROWTH IN ERYTHRONIUM GRANDIFLORUM (LILIACEAE)
Using pairs of pollen donors, I analyzed the growth of pollen tubes growing in different channels of the same style in Erythronium grandiflorum. After 24 hr the length of pollen tubes of randomlyExpand
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Plastic responses to temporal variation in moisture availability: consequences for water use efficiency and plant performance
The ability to appropriately modify physiological and morphological traits in response to temporal variation should increase fitness. We used recombinant hybrid plants generated by crossing taxa inExpand
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