Abstract
Analysis of electrophoretic phenotypes for phosphoglucoisomerase isozymes (PGI, EC 5.3.1.9) in Spanish populations of Dipcadi serotinum L. shows that this diploid species has three gene loci coding for PGI isozymes. The PGI-1 locus specifying the plastid isozymes has two alleles and is probably duplicated since the three banded phenotypes represents a fixed heterozygote which does not segregate among progenies. PGI-2 and PGI-3 loci specifying the cytoplasmic isozymes have three and five alleles respectively and they produce complex non-overlapping phenotypes with the formation of interlocus heterodimers between polypeptides specified by the PGI-2 and PGI-3 loci. These results suggest that the two loci coding for the cytosolic isozymes have arisen by the duplication of an ancestral gene.
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Pascual, L., Márquez, I. & López-Alonso, D. Evidence for the duplication of PGI genes in Dipcadi serotinum L. (Liliaceae). Heredity 60, 247–252 (1988). https://doi.org/10.1038/hdy.1988.38
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DOI: https://doi.org/10.1038/hdy.1988.38
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