The breeding system of Fossombronia foveolata and genetic differentiation in the F. foveolata species complex were studied using Random Amplified Polymorphic DNA (RAPD) markers. Polymorphism values for cloned siblings were not significantly different from those obtained from amplification of identical DNA samples. These results support the hypothesis that sporophytes display high levels of homozygosity. Nevertheless, low levels of genetic differentiation were detected between F. foveolata populations from spatially separated sites in southern Illinois. Monomorphism among siblings, low levels of polymorphism among southern Illinois populations, sporophyte production in clonal cultures maintained in an environmental chamber, growth of cultured clonal mats to sizes comparable to field populations, and short sperm and spore dispersal distances suggest that F. foveolata populations are probably established from single founder events and are maintained through inbreeding and vegetative reproduction. Degree of genetic relatedness among F. foveolata from Illinois, F. foveolata from Texas, F. cristula from Indiana, F. japonica from Japan, F. lamellata from Arkansas, F. porphyrorhiza from Brazil, F. pusilla from California, and F. texana from Texas were also estimated from RAPD data. UPGMA cluster analyses of several different similarity matrices resolved the following three species groups 1) F. foveolata, F. lamellata, F. cristula group; 2) F. japonica, F. porphyrorhiza, F. pusilla group; and 3) F. texana. These groupings are consistent with those based on analyses of morphological characters, as well as other molecular data sets.
You have requested a machine translation of selected content from our databases. This functionality is provided solely for your convenience and is in no way intended to replace human translation. Neither BioOne nor the owners and publishers of the content make, and they explicitly disclaim, any express or implied representations or warranties of any kind, including, without limitation, representations and warranties as to the functionality of the translation feature or the accuracy or completeness of the translations.
Translations are not retained in our system. Your use of this feature and the translations is subject to all use restrictions contained in the Terms and Conditions of Use of the BioOne website.