A cytological and molecular analysis of D-genome chromosome retention following F2–F6 generations of hexaploidxtetraploid wheat crosses
Article
Article Title | A cytological and molecular analysis of D-genome chromosome retention following F2–F6 generations of hexaploidxtetraploid wheat crosses |
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ERA Journal ID | 5177 |
Article Category | Article |
Authors | Padmanaban, Sriram (Author), Zhang, Peng (Author), Sutherland, Mark W. (Author), Knight, Noel L. (Author) and Martin, Anke (Author) |
Journal Title | Crop and Pasture Science |
Journal Citation | 69 (2), pp. 121-130 |
Number of Pages | 10 |
Year | 2018 |
Publisher | CSIRO Publishing |
Place of Publication | Clayton, Vic, Australia |
ISSN | 0004-9409 |
1836-0947 | |
1836-5795 | |
Digital Object Identifier (DOI) | https://doi.org/10.1071/CP17240 |
Abstract | Both hexaploid bread wheat (AABBDD) (Triticum aestivum L.) and tetraploid durum wheat (AABB) (T. turgidum spp. durum) are highly significant global food crops. Crossing these two wheats with different ploidy levels results in pentaploid (AABBD) F1 lines. This study investigated the differences in the retention of D chromosomes between different hexaploid × tetraploid crosses in subsequent generations by using molecular and cytological techniques. Significant differences (P < 0.05) were observed in the retention of D chromosomes in the F2 generation depending on the parents of the original cross. One of the crosses, 2WE25 × 950329, retained at least one copy of each D chromosome in 48% of its F2 lines. For this cross, the retention or elimination of D chromosomes was determined through several subsequent self-fertilised generations. Cytological analysis indicated that D chromosomes were still being eliminated at the F5 generation, suggesting that in some hexaploid × tetraploid crosses, D chromosomes are unstable for many generations. This study provides information on the variation in D chromosome retention in different hexaploid × tetraploid wheat crosses and suggests efficient strategies for utilising D genome retention or elimination to improve bread and durum wheat, respectively. |
Keywords | DArTseq, FISH, GISH, inter-ploidy crosses |
ANZSRC Field of Research 2020 | 300406. Crop and pasture improvement (incl. selection and breeding) |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | Centre for Crop Health |
University of Sydney | |
Institution of Origin | University of Southern Queensland |
Funding source | Grant ID GRDC |
https://research.usq.edu.au/item/q4xq5/a-cytological-and-molecular-analysis-of-d-genome-chromosome-retention-following-f2-f6-generations-of-hexaploidxtetraploid-wheat-crosses
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