Journal
HEREDITAS
Volume 137, Issue 2, Pages 113-118Publisher
BLACKWELL MUNKSGAARD
DOI: 10.1034/j.1601-5223.2002.01550.x
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Allozyme variation of ten heterozymes of seven enzymes among five accessions of a rare diploid Bromus fasciculatus was analysed with the use of PAGE and compared with that for six other species of section Genea of the genus Bromus. Allozymes charasteristic for diploids B. tectorum and B. fasciculatus are combined in fixed heterozygous phenotypes of tetraploid B. rubens. Fixed heterozygous phenotypes of tetraploid B. madritensis combine one allozyme of B. fasciculatus with another of diploid B. sterilis at each of the loci studied. Of the three diploids studied, only B. sterilis fits well for a role of a genome donor for the polyploid B. diandrus-rigidus complex. Bromus fasciculatus thus appears to be a diploid ancestor for the two tetraploids of section Genea, B. rubens and B. madritensis.
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