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- Title
Isozyme variation and the reproductive biology of Hydrocharis morsus-ranae L. (Hydrocharitaceae).
- Authors
SCRIBAILO, R. W.; CAREY, K.; POSLUSZNY, U.
- Abstract
Electro-phoretically detectable isozyme variation was studied for 17 enzyme systems in several N American populations of the introduced aquatic plant Hydrocharis morsus-ranae and in two European populations. Twenty-nine loci were inferred from progeny, adult and turion enzyme banding patterns with 28 of these loci homozygous in all individuals studied. Malate dehydrogenase-1 (MDH-1) was the only locus which could be interpreted as multi-allelic and heterozygous. Twenty-seven of 76 seedlings assayed showed an age specific expression for an alcohol dehydrogenase locus (ADH-2) never seen in adults or turions. Since all adults sampled were phenotypically identical at all loci assayed, it is possible that only one isozyme genotype of this species is present in N America. European turion data further indicated that the populations studied were identical to N American plants sampled at all loci except EST. Therefore, although H. morsus-ranae is dioecious, outcrossing appears to involve substantial inbreeding. Connections between extensive inbreeding and the failure of effective sexual reproduction are considered.
- Publication
Botanical Journal of the Linnean Society, 1984, Vol 89, Issue 4, p305
- ISSN
0024-4074
- Publication type
Article
- DOI
10.1111/j.1095-8339.1984.tb02562.x