THE BARLEY GENOME AND ITS RELATIONSHIP WITH THE WHEAT GENOMES - A SURVEY WITH AN INTERNATIONALLY AGREED RECOMMENDATION FOR BARLEY CHROMOSOME NOMENCLATURE
I. Lindelaursen et al., THE BARLEY GENOME AND ITS RELATIONSHIP WITH THE WHEAT GENOMES - A SURVEY WITH AN INTERNATIONALLY AGREED RECOMMENDATION FOR BARLEY CHROMOSOME NOMENCLATURE, Hereditas, 126(1), 1997, pp. 1-16
The paper reviews recent literature on the cytology, cytogenetics, mol
ecular cytogenetics, and gene structure of barley, and on the relation
ship of the barley and wheat genomes. The. information collected demon
strates largely similar genetic contents and collinearity of gene loci
in the seven chromosomes of barley and in those of other members of t
he Triticeae. The high level of synteny indicates that the whole group
can be considered as a single gene pool. On this basis, the 7th Inter
national Barley Genetics Symposium recommended that (i) the currently
used designations of the barley chromosomes (the BURNHAM and HAGBERG s
ystem) should become secondary to the use of the Triticeae system; i.e
., each of the seven barley chromosomes is designated by a numeral bet
ween 1 and 7 according to its homoeologous relationship with the chrom
osomes of the wheat genomes followed by the genomic symbol H, e.g., 2H
; (ii) the genomes of Hordeum vulgare and H. bulbosum are symbolized w
ith the letter H; and (iii) the arms of the barley chromosomes are des
ignated by the capital letters S and L (cf. SINGH and TSUCHIYA 1982b).
Further, it was recommended that the barley genome present in the bar
ley cultivar 'Betzes' should become the reference genome in the Tritic
eae.