Aneuploid Analysis in Tetraploid Wheat

TL;DRAbstract

This chapter discusses the aneuploids available in durum wheat and provides some suggestions for their use. In contrast to hexaploid wheat, aneuploids in the tetraploids have been available only since the late 1970s. Longwell and Sears suggested that one method of overcoming the deficiencies of the tetraploid monosomics is to produce tetraploid wheat plants that are monosomic for one chromosome in the A- or B genome and trisomic for the homoeologous chromosome in the other genome. Noronha-Wagner and Mello-Sampayo continued developing the monosomic trisomics of durum wheat into problems o flow fertility. Trisomics transmit the trisomic condition at variable rates depending on the chromosome involved. An increase in the frequency with which the D-genome chromosome is transmitted, at the expense of the A- or B-genome chromosome, can reduce the frequency of progeny with the mutant phenotype. The double ditelosomics were crossed with a durum wheat line having a pair of chromosomes substitut

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