| Abstract Detail
Developmental and Structural Section Bray, Rebecca D [1], Alarid, Khalid M [1]. The effect of interspecific hybridization and chromosome doubling on spore morphology, orbicule typology, sporangial wall ornamentation and velum coverage in Isoetes . BASED on morphology and distribution, Isoetes appalachiana (2n = 4x = 44) has been suspected to be the allotetraploid derivative of two basic diploids (2N = 2x = 22) I. engelmannii and I. valida. In western Virginia, the interspecific hybrid between I. engelmannii and I. valida, I. Xaltonharvillii has been discovered where its parents co-occur. These interspecific relationships have been verified by comparison of the second intron of a LFY homolog for these taxa. The current study of these 4 taxa examines morphology of spores, sporangial wall pigmentation, velum coverage, orbicule typology and stomatal character states to determine if morphological data mirrors molecular data. Log in to add this item to your schedule
1 - Old Dominion University, Department of Biological Sciences, Mills Godwin Building, 45th Street, Norfolk, Virginia, 23529-0266, USA
Keywords: Isoëtes hybrids allopolyploid.
Presentation Type: Oral Paper:Papers for Sections Session: 65-8 Location: 303/Bell Memorial Union Date: Wednesday, August 2nd, 2006 Time: 10:30 AM Abstract ID:750 |