Gene Location and Gene Mapping in Hexaploid Wheat
2013; Linguagem: Inglês
10.2134/agronmonogr13.2ed.c12
ISSN2156-3276
Autores Tópico(s)Chromosomal and Genetic Variations
ResumoDespite the widespread availability of fully or partially developed series of monosomic lines in a wide range of hexaploid wheats from many countries, most gene-location work has been, based on the original 'Chinese Spring' series developed by E.R. Sears. Since in the critical cross monosomic lines must be disomic, the detection of monosomic lines that are phenotypically homozygous can be used as a basis for rejection of a particular chromosome as a candidate for gene location. The possibility of gene mapping in wheat usually arises when one or more genes have been located to a particular chromosome. The procedures of nullisomic/monosomic analysis depend upon the breeding behavior of the monosomics, upon the particular allele present in the aneuploid series and whether the allele, especially when recessive, are expressed when present in the hemizygous state. Cytogenetic manipulations, including telocentric mapping, in turn confirm the chromosome locations indicated by statistical analyses.
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