Commonwealth Scientific and Industrial Research Organisation

Grains Research and Development Corporation

Carol Anne Harding

Peter Michael Chandler

The present invention provides a wheat plant comprising an Rht-B1 allele which encodes an Rht-B1 (DELLA) polypeptide. Grain from a near-isogenic wheat line comprising the dwarfing Rht-B1c allele was subjected to sodium azide mutagenesis. Plants exhibiting early leaf elongation rates or mature plant height greater than the dwarf parent were selected and the Rht-B1 gene sequenced. This identified 35 mutated alleles of Rht-B1c. Similar methods were also used to identify mutant alleles of the dwarfing sln1d allele in barley, where DELLA is encoded by the sln1 gene.

Wheat with new alleles of Rht-B1

The present invention provides a wheat plant comprising an Rht-B1 allele which encodes an Rht-B1 (DELLA) poly-peptide. Grain from a near-isogenic wheat line comprising the dwarfing Rht-B1c allele was subjected to sodium azide mutagenesis. Plants exhibiting early leaf elongation rates or mature plant height greater than the dwarf parent were selected and the Rht-B1 gene sequenced. This identified 35 mutated alleles of Rht-B1c. Similar methods were also used to identify mutant alleles of the dwarfing s1n1d allele in barley, where DELLA is encoded by the s1n1 gene.

Growing community of inventors

Hackett, Australia

Carol Anne Harding