Open AccessThe use of homoeologous pairing in the identification of homoeologous relationships in Triticeae
Author(s) -
NARANJO T.
Publication year - 1992
Publication title -
hereditas
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.819
H-Index - 50
eISSN - 1601-5223
pISSN - 0018-0661
DOI - 10.1111/j.1601-5223.1992.tb00145.x
Subject(s) - triticeae , biology , pairing , genetics , chromosomal translocation , chromosome , metaphase , chromosome pairing , genome , cytogenetics , gene , superconductivity , physics , quantum mechanics
Homoeologous pairing at metaphase I was analyzed in different wheat‐rye combinations to establish the arm homoeology of wheat and rye chromosomes. Chromosome arms being bound at metaphase 1 were identified by means of C‐banding. Pairing between chromosome arms of different homoeologous groups revealed the existence of translocations that occurred during the evolution of wheat and rye. The lack of homoeologous pairing that some chromosome arms of wheat and rye showed, is most likely the result of structural changes involving such arms. On the other hand, the pattern of pairing between arms with normal homoeologous relationships suggested that, among the three wheat genomes, A and D are more closely related than A with B or D with B. Phylogenetic inferences based on both the chromosome structure and the degree of relatedness of the A, B, D, and R genomes suggest that the analysis of homoeologous pairing can provide valuable information about the evolutionary relationships among Triticeae species.