Submitted to: Meeting Proceedings
Publication Type: Proceedings
Publication Acceptance Date: 11/24/2008
Publication Date: 11/27/2008
Citation: Palmer, R.G., Perez, P.T. 2008. Qualitative Genetics - Examples from Soybean and Other Crops. In: Proceedings of the Conventional and Molecular Breeding of Field and Vegetable Crops International Conference, November 24-27, 2008, Novi Sad, Serbia. p. 1-6.
Technical Abstract: Qualitative genetics, also known as Mendelian genetics or transmission genetics, refers to those genetic traits that have a distinct appearance (phenotype) and are controlled by one or few genes. Examples of qualitative genetics include response to abiotic and biotic stresses, and anatomical, morphological, physiological, and biochemical traits. One way to study the inheritance of qualitative traits in crop plants is by the development of near-isogenic lines, which refer to genetic lines that differ in only one trait. Near-isogenic lines can be developed by introgressing spontaneous mutations or mutations created by chemical or radiation treatments, or transposition of transposable elements, through repeated backcrossing to the recurrent parent. The use of near-isogenic lines has been very useful in the integration of the Classical Genetic Maps with the Molecular Genetic Maps. The rationale for their use is that if the donor parent allele is present in the near-isogenic line, then presumptive evidence of linkage between the molecular marker and the introgressed gene can be inferred. Examples of qualitative genetics and near-isogenic lines will include soybean, wheat, and tomato.