Linear differentiation of cereal chromosomes
- 1 July 1978
- journal article
- research article
- Published by Springer Science and Business Media LLC in Theoretical and Applied Genetics
- Vol. 51 (4), 145-152
- https://doi.org/10.1007/bf00273138
Abstract
Summary Using the Giemsa technique of differential staining (the BSG test), we have studies the karyotypes and constructed the idiograms of T. aestivum L. var. ‘Diamant’ and ‘Chinese Spring’, T. Monococcum L. v. ‘hornemannii’ ssp. roles occidentali georgicum Dek., Aegilops squarrosa L. v. ‘Meeyeri’, T. aestivum. The karyotypes of ‘Chinese Spring’ and ‘Diamant’ differ drastically both in total structural heterochromatin content and its localization on the nine morphologically homeologous chromosomes. The rest of the twelve pairs of chromosomes showed no morphological similarity. This indicates considerable differences in the phylogeny of the varieties, and also an absence of unique karyotype in T. aestivum. Three chromosomes of Ae. Squarrosa are similar to those of ‘Chinese Spring’, yet, on the whole, the chromosomal structural specificity of the diploids studied is so high that we fail to understand the nature of the homology between common wheat and its supposed diploid ancestors. The role of introgression in the evolution of the genomes of Triticum and Aegilops, and also the meaning of the conjugation and BSG tests in resolving the phylogeny, is discussed.Keywords
This publication has 22 references indexed in Scilit:
- Cytology of hexaploid cranberry with special reference to chromosomal fibresHereditas, 2009
- Influence of differential chromosome spiralisation on karyotype morphologyNature, 1975
- Introgression from tetraploid durum wheat to diploid Aegilops longissima and Aegilops speltoidesHeredity, 1974
- C-banding and non-homologous associations in Gryllus argentinusChromosoma, 1974
- Heterochromatin recognition and analysis of chromosome variation in Scilla sibiricaChromosoma, 1973
- A simple technique for demonstrating centromeric heterochromatinExperimental Cell Research, 1972
- Chromosomal interchanges and the phylogeny of wheatHeredity, 1967
- Evidence for homologous pairing of chromosomes prior to meiotic prophase in maizeChromosoma, 1967
- Heterochromatin at the Distal Ends of the Chromosomes in Triticum monococcumNature, 1938