Assessment of gene copy number in the homosporous ferns Ceratopteris thalictroides and C. richardii ( Parkeriaceae ) by restriction fragment length polymorphisms
dc.contributor.author | Pichersky, Eran | en_US |
dc.contributor.author | Hickok, Leslie G. | en_US |
dc.contributor.author | McGrath, J. Mitchell | en_US |
dc.date.accessioned | 2006-09-08T19:28:34Z | |
dc.date.available | 2006-09-08T19:28:34Z | |
dc.date.issued | 1994-09 | en_US |
dc.identifier.citation | McGrath, J. Mitchell; Hickok, Leslie G.; Pichersky, Eran; (1994). "Assessment of gene copy number in the homosporous ferns Ceratopteris thalictroides and C. richardii ( Parkeriaceae ) by restriction fragment length polymorphisms." Plant Systematics and Evolution 189 (3-4): 203-210. <http://hdl.handle.net/2027.42/41638> | en_US |
dc.identifier.issn | 1615-6110 | en_US |
dc.identifier.issn | 0378-2697 | en_US |
dc.identifier.uri | https://hdl.handle.net/2027.42/41638 | |
dc.description.abstract | Homosporous ferns are generally considered polyploid due to high chromosome numbers, but genetically diploid since the expression of isozymes is generally controlled by a single locus. Gene silencing over evolutionary time is one means by which this apparent contradiction can be explained. A prediction of this hypothesis is that silenced gene sequences still reside in the genomes of homosporous ferns. We examined the genomes of Ceratopteris richardii and C. thalictroides for sequences which are similar to expressed gene sequences. Genomic DNA blots hybridized with C. richardii cDNA clones showed that the majority of these clones detected multiple fragments, suggesting that most gene-like sequences are duplicated in Ceratopteris. Hybridization signal intensity often varied between fragments of the same size between accessions, sometimes dramatically, which indicates that not all sequences are equivalent, and may represent the products of silenced genes. Observed reciprocal differences in intensity could be due to reciprocally silenced genes. In addition, an unusual segregation pattern for one locus followed by one probe may indicate homeologous chromosome pairing and segregation. | en_US |
dc.format.extent | 896625 bytes | |
dc.format.extent | 3115 bytes | |
dc.format.mimetype | application/pdf | |
dc.format.mimetype | text/plain | |
dc.language.iso | en_US | |
dc.publisher | Springer-Verlag | en_US |
dc.subject.other | Gene Silencing | en_US |
dc.subject.other | Plant Systematics/Taxonomy/Biogeography | en_US |
dc.subject.other | Parkeriaceae | en_US |
dc.subject.other | Ceratopteris | en_US |
dc.subject.other | Plant Anatomy/Development | en_US |
dc.subject.other | Plant Sciences | en_US |
dc.subject.other | Homosporous Ferns | en_US |
dc.subject.other | C. Richardii | en_US |
dc.subject.other | Gene Duplication | en_US |
dc.subject.other | C. Thalictroides | en_US |
dc.subject.other | Polyploidy | en_US |
dc.subject.other | CDNA Clones | en_US |
dc.subject.other | Plant Ecology | en_US |
dc.subject.other | Life Sciences | en_US |
dc.title | Assessment of gene copy number in the homosporous ferns Ceratopteris thalictroides and C. richardii ( Parkeriaceae ) by restriction fragment length polymorphisms | en_US |
dc.type | Article | en_US |
dc.subject.hlbsecondlevel | Ecology and Evolutionary Biology | en_US |
dc.subject.hlbtoplevel | Science | en_US |
dc.description.peerreviewed | Peer Reviewed | en_US |
dc.contributor.affiliationum | Department of Biology, University of Michigan, 48109-1048, Ann Arbor, MI, USA | en_US |
dc.contributor.affiliationother | Department of Botany, University of Tennessee, 37996, Knoxville, TN, USA | en_US |
dc.contributor.affiliationother | Department of Plant Pathology, University of Wisconsin, 1630 Linden Dr., 53706, Madison, WI, USA | en_US |
dc.contributor.affiliationumcampus | Ann Arbor | en_US |
dc.description.bitstreamurl | http://deepblue.lib.umich.edu/bitstream/2027.42/41638/1/606_2004_Article_BF00939726.pdf | en_US |
dc.identifier.doi | http://dx.doi.org/10.1007/BF00939726 | en_US |
dc.identifier.source | Plant Systematics and Evolution | en_US |
dc.owningcollname | Interdisciplinary and Peer-Reviewed |
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