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Molecular relationships between closely related strains and species of nematodesElectrophoretic comparisons have been made for 24 enzymes in the Bergerac and Bristol strains of Caenorhabditis elegans and the related species, Caenorhabditis briggsae. No variation was detected between the two strains of C. elegans. In contrast, the two species, C. elegans and C. briggsae exhibited electrophoretic differences in 22 of 24 enzymes. A consensus 5S rRNA sequence was determined for C. elegans and found to be identical to that from C. briggsae. By analogy with other species with relatively well established fossil records it can be inferred that the time of divergence between the two nematode species is probably in the tens of millions of years. The limited anatomical evolution during a time period in which proteins undergo extensive changes supports the hypothesis that anatomical evolution is not dependent on overall protein changes.
Document ID
19820044693
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Butler, M. H.
(Houston Univ. TX, United States)
Wall, S. M.
(Houston Univ. TX, United States)
Luehrsen, K. R.
(Houston Univ. TX, United States)
Fox, G. E.
(Houston Univ. TX, United States)
Hecht, R. M.
(Houston, University Houston, TX, United States)
Date Acquired
August 10, 2013
Publication Date
December 1, 1981
Publication Information
Publication: Journal of Molecular Evolution
Volume: 18
Subject Category
Life Sciences (General)
Accession Number
82A28228
Funding Number(s)
CONTRACT_GRANT: NSG-7440
CONTRACT_GRANT: PHS-HD-11071
Distribution Limits
Public
Copyright
Other

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