Biochemical variation to determine phylogenetic relationships betweenHordeum chilense and other American species of the genusHordeum (Poaceae) |
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Authors: | J Antonio Fernández Julio Sanz Nicolás Jouve |
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Institution: | (1) Department of Cell Biology and Genetics, University of Alcala de Henares, Apdo. 20, Alcalá de Henares, Madrid, Spain |
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Abstract: | Slab gel electrophoresis techniques have been applied to the study of isozyme and kernel protein patterns in 20 accessions ofHordeum chilense and related species in order to elucidate their phylogenetic relationships. On the basis of our results we can conclude that: (1) Conventional classification based on morphological characters does not totally agree with biochemical data. (2) Sectt.Anisolepis andCritesion seem to be clearly differentiated. (3) The accessions classified asH. compressum present biochemical phenotypes quite different from the rest of the species. (4)H. stenostachys, H. muticum andH. chilense constitute a group of variable species with many biochemical similarities and close phylogenetic relationships. (5) The evolutionary pattern of these American species seems to follow a model of reticulate evolution. |
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Keywords: | Angiosperms Poaceae Hordeum sectt Critesion andAnisolepis Isozyme patterns kernel proteins phylogenetic relationships |
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