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[Evaluation of phylogenetic relationships between five polyploid Aegilops L. species of the U-genome cluster by means of chromosomal analysis].
Genetika. 2002 Jun; 38(6):799-811.G

Abstract

Four tetraploid (Aegilops ovata, Ae. biuncialis, Ae. columnaris, and Ae. triaristata) and one hexaploid (Ae. recta) species of the U-genome cluster were studied using C-banding technique. All species displayed broad C-banding polymorphism and high frequency of chromosomal rearrangements. Chromosomal rearrangements were represented by paracentric inversions and intragenomic and intergenomic translocations. We found that the processes of intraspecific divergence of Ae. ovata, Ae. biuncialis, and Ae. columnaris were probably associated with introgression of genetic material from other species. The results obtained confirmed that tetraploid species Ae. ovata and Ae. biuncialis occurred as a result of hybridization of a diploid Ae. umbellulata with Ae. comosa and Ae. heldreichii, respectively. The dissimilarity of the C-banding patterns of several chromosomes of these tetraploid species and their ancestral diploid forms indicated that chromosomal aberrations might have taken place during their speciation. Significant differences of karyotype structure, total amount and distribution of C-heterochromatin found between Ae. columnaris and Ae. triaristata, on the one hand, and Ae. ovata and Ae. biuncialis, on the other, evidenced in favor of different origin of these groups of species. In turn, similarity of the C-banding patterns of Ae. columnaris and Ae. triaristata chromosomes suggested that they were derived from a common ancestor. A diploid species Ae. umbellulata was the U-genome donor of Ae. columnaris and Ae. triaristata; however, the donor of the second genome of these species was not determined. We assumed that these tetraploid species occurred as a result of introgressive hybridization. Similarity of the C-banding patterns of chromosomes of Ae. recta and its parental species Ae. triaristata and Ae. uniaristata indicated that the formation of the hexaploid form was not associated with large modifications of the parental genomes.

Authors+Show Affiliations

Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow, 119991 Russia. chrom@genome.eimb.relarn.ru

Pub Type(s)

Evaluation Study
Journal Article

Language

rus

PubMed ID

12138779

Citation

Badaeva, E D.. "[Evaluation of Phylogenetic Relationships Between Five Polyploid Aegilops L. Species of the U-genome Cluster By Means of Chromosomal Analysis]." Genetika, vol. 38, no. 6, 2002, pp. 799-811.
Badaeva ED. [Evaluation of phylogenetic relationships between five polyploid Aegilops L. species of the U-genome cluster by means of chromosomal analysis]. Genetika. 2002;38(6):799-811.
Badaeva, E. D. (2002). [Evaluation of phylogenetic relationships between five polyploid Aegilops L. species of the U-genome cluster by means of chromosomal analysis]. Genetika, 38(6), 799-811.
Badaeva ED. [Evaluation of Phylogenetic Relationships Between Five Polyploid Aegilops L. Species of the U-genome Cluster By Means of Chromosomal Analysis]. Genetika. 2002;38(6):799-811. PubMed PMID: 12138779.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - [Evaluation of phylogenetic relationships between five polyploid Aegilops L. species of the U-genome cluster by means of chromosomal analysis]. A1 - Badaeva,E D, PY - 2002/7/26/pubmed PY - 2002/10/17/medline PY - 2002/7/26/entrez SP - 799 EP - 811 JF - Genetika JO - Genetika VL - 38 IS - 6 N2 - Four tetraploid (Aegilops ovata, Ae. biuncialis, Ae. columnaris, and Ae. triaristata) and one hexaploid (Ae. recta) species of the U-genome cluster were studied using C-banding technique. All species displayed broad C-banding polymorphism and high frequency of chromosomal rearrangements. Chromosomal rearrangements were represented by paracentric inversions and intragenomic and intergenomic translocations. We found that the processes of intraspecific divergence of Ae. ovata, Ae. biuncialis, and Ae. columnaris were probably associated with introgression of genetic material from other species. The results obtained confirmed that tetraploid species Ae. ovata and Ae. biuncialis occurred as a result of hybridization of a diploid Ae. umbellulata with Ae. comosa and Ae. heldreichii, respectively. The dissimilarity of the C-banding patterns of several chromosomes of these tetraploid species and their ancestral diploid forms indicated that chromosomal aberrations might have taken place during their speciation. Significant differences of karyotype structure, total amount and distribution of C-heterochromatin found between Ae. columnaris and Ae. triaristata, on the one hand, and Ae. ovata and Ae. biuncialis, on the other, evidenced in favor of different origin of these groups of species. In turn, similarity of the C-banding patterns of Ae. columnaris and Ae. triaristata chromosomes suggested that they were derived from a common ancestor. A diploid species Ae. umbellulata was the U-genome donor of Ae. columnaris and Ae. triaristata; however, the donor of the second genome of these species was not determined. We assumed that these tetraploid species occurred as a result of introgressive hybridization. Similarity of the C-banding patterns of chromosomes of Ae. recta and its parental species Ae. triaristata and Ae. uniaristata indicated that the formation of the hexaploid form was not associated with large modifications of the parental genomes. SN - 0016-6758 UR - https://www.unboundmedicine.com/medline/citation/12138779/[Evaluation_of_phylogenetic_relationships_between_five_polyploid_Aegilops_L__species_of_the_U_genome_cluster_by_means_of_chromosomal_analysis]_ DB - PRIME DP - Unbound Medicine ER -