  The present study, investigated some reproductive and fertility parameters in
some wild populations, originating from the North Tunisia (4 populations of
Medicago ciliaris and 3 populations of Medicago intertexta). Previous finding
revealed that these species are genetically distinct and easily recognized by
the number of flowers per inflorescence and pod dimensions. However,
biometrical traits and isozyme patterns intermediacy between these two species
had detected the existence of a potential spontaneous interspecific hybrid
originating from Sedjnane locality in Tunisia. Indeed, the present work has
shown significant decrease of pollen fertility and seed production for this
population when compared to the others(pollen viability 75%, pollen
germinability 8% and pod production=9%). These results suggested a possible
natural interspecific hybrid and confirming introgressive hybridization
possibility between M. intertexta and M. ciliaris.
