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  • 1
    Electronic Resource
    Electronic Resource
    Confirmation of primitive chromosome structure in the hexaploid wheats (1988)
    Springer
    Theoretical and applied genetics 75 (1988), S. 717-719 
    Details
    ISSN: 1432-2242
    Keywords: Hexaploid wheats ; Primitive chromosome structure ; Translocation ; Chinese Spring ; Triticum dicoccoides
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Hybrids between Triticum aestivum cv Chinese Spring (CS) and T. dicoccoides of chromosome type E1a showed only a few or no trivalents at meiosis, but both trivalents and quadrivalents were shown by hybrids with six other types. Since there is strong evidence that the E1a type has the primitive chromosome structure of T. dicoccoides, Chinese Spring can be said to have the primitive chromosome structure of the hexaploid wheats in regard to reciprocal translocation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00265592
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  • 2
    Electronic Resource
    Electronic Resource
    Numerical analyses of karyotypic diversity in the genusEupatorium (Compositae, Eupatorieae) (1990)
    Springer
    Plant systematics and evolution 170 (1990), S. 215-228 
    Details
    ISSN: 1615-6110
    Keywords: Angiosperms ; Compositae ; Eupatorium ; Chromosomal distance ; chromosomal identity ; karyotype analysis ; statistics phenetics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Somatic metaphase karyotypes were analyzed for 22 diploid species ofEupatorium. The karyotypic comparisons were made using two indices: minimal chromosomal distance (MCD), measuring overall dissimilarities, and chromosomal identity (CI), measuring number of morphologically identical chromosomes between species. The resulting phenograms from these indices are largely compatible. The 22 species cluster into four groups in the phenogram using MCD, and the grouping corresponds well with morphology or geographic distribution into the three N. American groupsEutrochium, Uncasia, Traganthes, and the E. Asian group. These results suggest that karyotypes in perennialEupatorium have been considerably conservative and changed not through large chromosomal mutations but through small chromosomal mutations gradually fixed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00937705
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