[Phylogeny of Triticum L. and Aegilops L. genuses inferred from a comparative analysis of nucleotide sequences in promoter rDNA regions of individual species].
The process of accumulation of knowledge on wheat and related wild species during the 20th century is briefly reviewed with special reference to the evidence of the recent years on evolution of polyploid wheats and the role of diploid species. The latter serve as potential donors of the genomes, detection of which is particularly important because of the continuing speciation in the tribe Triticeae and artificial development of synthetic forms. The arguments in favor of the donor role for various diploid wheat species and aegilopses from the section Sitopsis are compared. It is stated that in the formation of the both lines of polyploid wheats turgidum-aestivum and timopheevi, diploid Aegilops speltoides acted as a maternal form. In addition to plasmatic genomes, this aegilops species introduced into them also the B and G nuclear subgenomes. A comparison of nucleotide sequences in the variable part of the promoter of evolutionary conserved rRNA genes in polyploid wheats with their counterparts in diploid wheats and aegilopses confirmed the accepted wheat phylogenies.
Vakhitov
V A
VA
Institute of Biochemistry and Genetics, Ufa Research Center, Russian Academy of Sciences, Ufa, 450054 Russia.
Chemeris
A V
AV
Sabirzhanov
B E
BE
Akhunov
E D
ED
Kulikov
A M
AM
Nikonorov
Iu M
IuM
Gimalov
F R
FR
Bikbulatova
S M
SM
Baĭmiev
A Kh
AKh
D001483:Base Sequence; D004275:DNA, Ribosomal / Q000235:genetics*; D004171:Diploidy; D019143:Evolution, Molecular; D018745:Genome, Plant; D010802:Phylogeny; D006109:Poaceae / Q000235:genetics*; D011123:Polyploidy; D011401:Promoter Regions, Genetic; D014908:Triticum / Q000235:genetics*
D004275:DNA, Ribosomal