Chromosomal Location of Genes for Gibberellic Acid Insensitivity in 'Chinese Spring' Wheat by Tetrasomic Analysis |
| |
Authors: | A. Bö rner,,A. J. Worland, C. N. Law |
| |
Affiliation: | Institut für Genetik und Kulturpflanzenforschung, Corrensstr. 3, O-4325 Gatersleben, Germany;Cambridge Laboratory, Center for Plant Science Research, Colney Lane, Norwich NR4 7UJ, Great Britain |
| |
Abstract: | The tetrasomics of the homoeologous groups 2, 5 and 7 of‘Chinese Spring’wheat were, together with the euploid standard, screened at the seedling stage for sensitivity to exogenously applied gibberellic acid (GA3). Whilst the seedling length of lines tetrasomic for group 2 chromosomes were taller and those for chromosomes 5A, 5D and 7D shorter in both treatments (with and without GA3) compared to the euploid control, the remaining tetrasomics — 5B, 7A and 7B — were significantly shorter than the euploids in the GA variant only. These results suggest the presence of additional genetic factors for GA insensitivity on chromosomes of the groups 5 and 7 of hexaploid wheat. This corresponds with the localization of GA insensitive dwarfing genes on the homoeologous chromosomes 5R and 7R in diploid rye. |
| |
Keywords: | Triticum aestivum gibberellic acid insensitivity semi-dwarfness gene homoeology |
|
|