Control of late maturity alpha-amylase in wheat by the dwarfing gene Rht-D1b and genes on the 1B/1R translocation.

Farrell, A.D., Kettlewell, P.S., Simmons, J., Flintham, J.E., Snape, J.W., Werner, P. and Jack, P.L. (2013) Control of late maturity alpha-amylase in wheat by the dwarfing gene Rht-D1b and genes on the 1B/1R translocation. Molecular Breeding, 32 (2). pp. 425-436.

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Abstract

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 × 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 × Potent genotypes fixed for Rht-D1b, the 1B/1R effect was similar to that seen in the equivalent Spark × 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

Item Type: Article
Divisions: Crop and Environment Sciences
Depositing User: Mr Darren Roberts
Date Deposited: 07 Nov 2018 15:17
Last Modified: 29 Nov 2018 12:09
URI: http://hau.repository.guildhe.ac.uk/id/eprint/17063

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