Summary
Based on an improved C-banding technique, the C-banding patterns of all 11 diploid Aegilops species were described and compared. All diploid species exhibit characteristically different patterns which enable the chromosomes of any complement to be identified individually. These patterns confirm existing genome symbols and provide further evidence for the suggested changes in genome symbols of Ae. umbellulata and Ae. sharonensis, U and Ssh respectively. Furthermore, Ae. uniaristata should be given a separate symbol, probably N. Aegilops speltoides and Ae. sharonensis could be possible donors to the B genome of wheat. Interspecific divergence in these diploid species has been accompanied by either amplification or deletion as well as massive repatterning of heterochromatin from the centromere to the telomere.
Similar content being viewed by others
References
Chennaveeraiah MS (1960) Karyomorphologic and cytotaxonomic studies in Aegilops. Acta Hort Gotoburgensis 23:85–178
Feldman M (1978) New evidence on the origin of the B genome of wheat. In: Ramanujam S (ed) Proc 15th Int Wheat Genetics Symp, Vol 1. Indian Society of Genetics and Plant Breeding, New Delhi, pp 120–132
Flavell RB (1980) The molecular characterization and organisation of plant chromosomal DNA sequences. Ann Rev Plant Physiol 31:569–596
Gerlach WL (1977) N-banded karyotypes of wheat species. Chromosoma 62:49–56
Gerlach WL, Peacock WJ (1980) Chromosomal locations of highly repeated DNA sequences in wheat. Heredity 44:269–276
Gill BS (1981) Evolutionary relationships based on heterochromatin bands in six species of the Triticinae. J Heredity 72:391–394
Gill BS, Kimber G (1974) Giemsa C-banding and the evolution of wheat. Proc Natl Acad Sci USA 71:4086–4090
Greilhuber J, Deumling B, Speta F (1981) Evolutionary aspects of chromosome banding, heterochromatin, satellite DNA, and genome size in Scilla (Lilaceae). Ber Dtsch Bot Ges 94:249–266
Hadlaczky GY, Belea A (1975) C-banding in wheat evolutionary cytogenetics. Plant Sci Lett 4:85–88
Hutchinson J, Lonsdale DM (1982) The chromosomal distribution of cloned highly repetitive sequences from hexaploid wheat. Heredity 48:371–376
Iordansky AB, Zurabishvili TB, Badaev NS (1978) Linear differentiation of cereal chromosomes. 1. Common wheat and its supposed ancestors. Theor Appl Genet 51:145–152
Jalal SM, Clark RW, Hsu TC, Pathak S (1974) Cytological differentiation of constitutive heterochromatin. Chromosoma 48:391–403
Kihara H (1954) Considerations on the evolution and distribution of Aegilops species based on the analyser method. Cytologia 19:336–573
Kimber G, Abu-Baker M (1981) The genomic relationship of Triticum dichasians and T. umbellulatum. Z Pflanzenzücht 87:265–273
Kushnir U, Halloran GM (1981) Evidence for Aegilops sharonensis. Eig as the donor of the B genome of wheat. Genetics 99:495–512
Maan SS, Sasakuma T (1978) Chromosome pairing relationships among the D and M genomes of Triticum and Aegilops species. In: Ramanujam S (ed) Proc 5th Ind Wheat Symp, Vol 1. Indian Society of Genetics and Plant Breeding, New Delhi, pp 322–331
Miller TE (1981) Chromosome pairing of intergeneric amphiploids as a means of assessing genome relationships in the Triticeae. Z Pflanzenzücht 87:69–78
Natarajan AT, Sarma NP (1974) Chromosome banding patterns and the origin of the B genome in wheat. Genet Res 24:103–108
Schweizer D, Ehrendorfer F (1976) Giemsa banded karyotypes, systematics, and evolution in Anacyclus (Asteraceae-Anthemideae). Plant Syst Evol 126:107–148
Schweizer D, Nagl W (1976) Heterochromatin diversity in Cymbidium and its relationship to differential DNA replication. Exp Cell Res 98:411–423
Seal AG (1982) C-banded wheat chromosomes in wheat and triticale. Theor Appl Genet 63:39–47
Seal AG, Bennett MD (1981) The rye genome in winter hexaploid triticales. Can J Genet Cytol 23:647–653
Author information
Authors and Affiliations
Additional information
Communicated by R. Riley
Rights and permissions
About this article
Cite this article
Teoh, S.B., Hutchinson, J. Interspecific variation in C-banded chromosomes of diploid Aegilops species. Theoret. Appl. Genetics 65, 31–40 (1983). https://doi.org/10.1007/BF00276259
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF00276259