Revista Chilena de Historia Natural
نویسنده
چکیده
To analyze seasonal genetic changes of natural Porphyra patches in the same location, isozymic analysis was carried out by starch gel electrophoresis. Eleven isozyme loci: Aat, Cat, Dia, Gpi, G6pdh, Gdh, Mdh, Mpi, Pgm, 6Pgdh and Sod were scored in Porphyra gametophytic thalli collected between November 1987 and April 1988 from one location, which was divided into 3 sampling sites, from the seashore to the offshore, at Fukushima Prefecture-Japan. A visible change due to time was observed in the allele frequencies. The allelic combination of the 11 loci for the 3 sampling sites varied from 1 to 14. The predominant combination changed due to time. The new alleles found at Gpi and Sod, indicate the clone of Porphyra pseudalinearis Ueda. Combination with the new alleles were only observed from November up to the middle of January. The first change (from November to December) of the predominant allelic combination revealed, that the clone of P. pseudolinearis tends to disappear, increasing at that time the population of Porphyra yezoensis Ueda, and that the second change (from March to April) revealed the predominance of another clone of P. yezoensis. The seasonal change of the predominant allelic combination leads to the conclusion that the clonal propagation of these gametophytes is the responsible for the formation of patches.
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