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Intraspecific variation in C-banded chromosomes of Aegilops comosa and Ae. speltoides

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Summary

Intraspecific variation in C-banding patterns can be used to differentiate subspecies of Ae. comosa, i.e. eu-comosa and heldrechii, but not those belonging to Ae. speltoides. Among the eu-comosa accessions, comosa E appears to possess a totally different karyotype as well as banding pattern. Two contrasting types of polymorphic changes were found. The first and more common type, observed in the 2 subspecies of Ae. speltoides and 2 accessions of Ae. comosa ssp. eucomosa, involved variation in C-band size and presence or absence of interstitial, terminal and proximal bands within a basic recognisable pattern. The second type involved complete repatterning of C-bands and could be seen in Ae. comosa where the ssp. eu-comosa has predominantly interstitial C-bands in contrast to centromeric and telomeric bands in the other ssp. heldrechii. Furthermore, the extent of polymorphic variation was found to vary between chromosomes of Ae. speltoides. That polymorphic changes have occurred without loss of fertility in hybrids between subspecies of each of the 2 species confirms that these sorts of changes have no effect on chromosome pairing or fertility. Polymorphic changes appear to be widespread within and between diploid Aegilops species and their non-random distribution seem to suggest that these changes could perhaps be intimately associated with the processes of speciation and subspeciation.

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References

  1. Chennaveeriaiah MS (1960) Karyomorphologic and cytotaxonomic studies in Aegilops. Acta Horti Gotob 23:85–178

  2. Gill BS (1981) Evolutionary relationships based on heterochromatin bands in six species of the Triticinae. J Hered 72:391–394

  3. Gill BS, Kimber G (1974) Giemsa C-banding and the evolution of wheat. Proc Natl Acad Sci USA 71:4086–4090

  4. Greilhuber J, Deumling B, Speta F (1981) Evolutionary aspects of chromosome banding, heterochromatin, satellite DNA and genome size in Scilla (Liliaceae). Ber Dtsch Bot Ges 94:249–266

  5. Gustafson JP, Krolow KD (1978) A tentative identification of chromosomes present in tetraploid triticale based on heterochromatic banding patterns. Can J Genet Cytol 20:199–204

  6. Iordansky AB, Zurabishvili TG, Badaev NS (1978) Linear differentiation of cereal chromosomes. 3. Rye, triticale and ‘Aurora’ variety. Theor Appl Genet 51:281–288

  7. John B (1981) Heterochromatin variation in natural populations. Chromosomes Today 7:128–137

  8. Kihara H (1940) Verwandtschaft der Aegilops-Arten im Lichte der Genomanalyse. Ein Überblick. Züchter 12:49–62

  9. Kihara H, Yamashita K (1956) Wheat and its relatives. Wheat Inf Serv 4:16–24

  10. Linde-Laursen I (1978) Giemsa C-banding of barley chromosomes. 1. Banding pattern polymorphism. Hereditas 88:55–64

  11. Maan SS, Sasakuma T (1978) Chromosome pairing relationships among the D and M genomes of Triticum and Aegilops species. Indian Soc Genet Plant Breed 1:322–331

  12. Miller TE (1981) Chromosome pairing of intergeneric amphiploids as a means of assessing genome relationships in the Triticeae. Z Pflanzenzücht 87:69–78

  13. Riley R, Unrau J, Chapman V (1958) Evidence on the origin of the B genome of wheat. J Hered 49:91–98

  14. Schweizer D, Ehrendorfer F (1976) Giemsa banded karyotypes, systematics, and evolution in Anacyclus (Asterceae-Anthemideae). Plant Syst Evol 126:107–148

  15. Seal AG (1982) C-banded wheat chromosomes in wheat and triticale. Theor Appl Genet 63:39–47

  16. Sears ER (1941) Chromosome pairing and fertility in hybrids and amphidiploids in the Triticinae. Univ Mo Coll Agric Res Bull 337:1–10

  17. Tanaka M (1955) Chromosome pairing in hybrids between Aegilops sharonensis and some species of Aegilops and Triticum. Wheat Inf Serv 2:7–8

  18. Teoh SB, Hutchinson J (1983) Interspecific variation in Cbanded chromosomes of diploid Aegilops species. Theor Appl Genet 65:31–40

  19. Vosa CG (1976) Heterochromatic patterns in A llium. 1. The relationship between the species of the cepa group. Heredity 36:383–392

  20. Vosa CG, Marchi P (1972) Quinacrine fluorescence and Giemsa staining in plants. Nature (London), New Biol 237:191–192

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Communicated by R. Riley

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Teoh, S.B., Miller, T.E. & Reader, S.M. Intraspecific variation in C-banded chromosomes of Aegilops comosa and Ae. speltoides . Theoret. Appl. Genetics 65, 343–348 (1983). https://doi.org/10.1007/BF00276575

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Key words

  • C-banding
  • Aegilops
  • Intraspecific variation