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Chromosomal Location of Genes for Gibberellic Acid Insensitivity in ‘Chinese Spring’ Wheat by Tetrasomic Analysis
Author(s) -
Börner A.,
Worland A. J.,
Law C. N.
Publication year - 1992
Publication title -
plant breeding
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.583
H-Index - 71
eISSN - 1439-0523
pISSN - 0179-9541
DOI - 10.1111/j.1439-0523.1992.tb00103.x
Subject(s) - biology , gibberellic acid , dwarfing , ploidy , seedling , aneuploidy , chromosome , genetics , gene , botany , germination
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 (GA 3 ). 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 GA 3 ) 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.