Genetical and chromosomal relationships among the wheats and their relatives : aneuploid genetics, isozymes, gene and chromosome evolution, triticum, wheat
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Results obtained from aneuploid genetic analyses of isozyme variation in hexaploid wheat have led to the construction of reasonable models for the genetic control and subunit structure of a large number of enzymes. Evidence has been obtained for the chromosomal locations of 57 isozyme structural genes in the cultivar Chinese Spring, including one duplicate and fifteen triplicate sets of homoeologous genes. Analyses of hexaploid wheat strains containing alien chromosomes have provided evidence for the chromosomal locations of approximately 20 isozyme structural genes in three other Triticeae species. Extensive inter-genomic variation between homoeologous structural genes has been detected in the tribe Triticeae. However, the chromosomal locations thus far determined for these genes in different genomes indicate that the ancestral Triticeae gene linkage relationships are largely conserved in the genomes that exist today.