期刊
MOLECULAR BREEDING
卷 32, 期 2, 页码 425-436出版社
SPRINGER
DOI: 10.1007/s11032-013-9881-5
关键词
Bread wheat; Flour quality; alpha-amylase; Falling number; Rht; 1B/1R; Epistasis
资金
- Department of Environment, Food and Rural Affairs
- Biotechnology and Biological Sciences Research Council
- HGCA through the Sustainable Arable LINK Programme [RD-2005-3196]
- Biotechnology and Biological Sciences Research Council [BBS/E/J/000C0628] Funding Source: researchfish
- BBSRC [BBS/E/J/000C0628] Funding Source: UKRI
The occurrence of late maturity alpha-amylase (LMA) was investigated using two doubled haploid wheat populations segregating for the dwarfing gene Rht-D1b and the 1B/1R translocation. Genotypes were assessed in the field and in controlled environments where a cold-shock treatment was used to induce LMA. Results from field-grown genotypes from the cross Spark x Rialto suggest that the absence of Rht-D1b or the presence of the 1B/1R translocation increases the expression of LMA.These two genetic factors were found to act independently and to have a positive interaction (complementary epistasis). In Option x Potent genotypes fixed for Rht-D1b, the 1B/1R effect was similar to that seen in the equivalent Spark x Rialto genotypes. Under controlled environment conditions, genotypes with the 1B/1R translocation showed a higher occurrence of LMA under both control and cold-shock conditions. 1B/1R was present in the majority of genotypes expressing LMA under control and cold-shock conditions. The results point to the novel finding that the 1B/1R translocation increases the expression of alpha-amylase in LMA-prone germplasm independently of effects of Rht-D1b, whereas previously it had been thought to act by a modification of the Rht-D1b effect.
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