Abstract
The genetics of one malate dehydrogenase locus and two peroxidase loci were studied in leaves of diploid and more particularly tetraploid Dactylis glomerata L. by means of starch gel electrophoresis. Seven, two and four codominant alleles at the PX1, PX2 and MDH1 loci respectively are described. Malate dehydrogenases showed dimeric structure and peroxidases behaved as monomers but with several molecular structures in the case of PX1. No linkage was found between PX1 and MDH1 nor between PX1 or MDH1 and other loci studied previously.
The polymorphism of the PX1 and MDH1 loci was investigated in four natural populations. Allelic frequencies and phenotypic distributions revealed a great difference in allelic diversity and in the level of heterozygotes between Eurasian and Mediterranean populations for PX1. Numerous alleles with very low frequencies were found at the MDH1 locus in all tetraploid populations.
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Lumaret, R. Protein variation in diploid and tetraploid orchard grass (Dactylis glomerata L.): Formal genetics and population polymorphism of peroxidases and malate dehydrogenases. Genetica 57, 207–215 (1982). https://doi.org/10.1007/BF00056484
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DOI: https://doi.org/10.1007/BF00056484