Mutation breeding for resistance to fungal disease and for drought tolerance

摘要

Particular aspects provide novel mutant plants and plant parts thereof, derived via mutagenesis, having disease resistance and other useful traits. Particular embodiments provide a wheat genotype ‘RRR Scarlet’ (‘Scarlet-Rz1’), plants and seeds thereof, methods for producing a plant comprising crossing ‘Scarlet-Rz1’ plants with another wheat plant, hybrid wheat seeds and plants produced by crossing ‘Scarlet-Rz1’ plants with another line or plant, and creation of variants by mutagenesis or transformation of ‘Scarlet-Rz1’. Additional aspects provide methods for producing other varieties or breeding lines derived from ‘Scarlet-Rz1’ and to varieties or breeding lines produced thereby. Further aspects provide for mutant plants and plant parts thereof that are resistant and/or tolerant to plant root fungal pathogens such as Rhizoctonia and Pythium. Additional embodiments provide mutant plants and plant parts thereof that exhibit stress tolerance and/or resistance. Yet further aspects provide mutant plants and plant parts thereof that are drought resistant or tolerant.

主权项

1. A wheat plant or a part thereof, comprising a semi-dominant mutation that confers root fungal tolerance to at least one root fungal pathogen selected from the group consisting of Rhizoctonia and Pythium, wherein the semi-dominant mutation is from a root fungal pathogen-tolerant wheat genotype resulting from ethyl methane sulfonate (EMS) mutagenesis of wheat germplasm, wherein the root fungal pathogen-tolerant wheat genotype is tolerant to at least one root fungal pathogen selected from the group consisting of Rhizoctonia and Pythium.