Abstract
The distribution of CHy-banded heterochromatin was studied in the chromosomes ofAegilops longissima, Ae. speltoides, Triticum monococcum, andT. turgidum. Interphase nuclei were measured after Feulgen staining at different thresholds of optical density; the curves so obtained indicated the relationship among the species with respect to the different fractions of the genomic DNA. The karyological and cytophotometric analyses indicate differences betweenAe. speltoides andAe. longissima, the latter species being enriched in heterochromatin. Similar results were demonstrated for the genusTriticum, in whichT. turgidum showed more heterochromatin when compared withT. monococcum. The results suggest that the B genome of the cultivated wheats possesses a type of heterochromatin that resembles the type present inAe. longissima.
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Di Terlizzi, P., Frediani, M., Cremonini, R. et al. CHy-banding patterns and chromatin organization inAegilops andTriticum species (Poaceae). Pl Syst Evol 184, 1–10 (1993). https://doi.org/10.1007/BF00937775
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DOI: https://doi.org/10.1007/BF00937775