White rust resistant Chrysanthemum plants

Abstract

Provided herein are white rust resistant plants of the genus Chrysanthemum and seeds, plant parts, plant cells and progeny thereof. Also provided herein are markers for identifying white rust resistant plants of the genus Chrysanthemum. Specifically, the present invention relates to plant belonging to the genus Chrysanthemum, the plants are resistant to white rust and the plants comprise in their genome at least one genomic region, or gene or allele, providing white rust resistance, the white rust resistance providing genomic region, or gene or allele, is genetically linked to a nucleic acid sequence comprised in at least one copy in the genome of the resistant plants and is represented by SEQ ID No. 2.

Claims

1. A Chrysanthemum plant having resistance to white rust and comprising in its genome SEQ ID NO: 2, seed of said plant having been deposited under NCIMB Accession No. 42455.

2. The Chrysanthemum plant of claim 1, wherein the Chrysanthemum plant comprises in its genome SEQ ID NO: 1.

3. The Chrysanthemum plant of claim 1, wherein a causative pathogen of said white rust is Puccinia horiana.

4. Progeny of the Chrysanthemum plant of claim 1, wherein the progeny is resistant to white rust and comprises in its genome SEQ ID NO: 2.

5. The Chrysanthemum plant of claim 4, wherein said plant is a cut Chrysanthemum or said plant is a pot Chrysanthemum.

6. The Chrysanthemum plant of claim 4, wherein said plant is a Chrysanthemum x morifolium plant, said plant is resistant to the white rust pathogen Puccinia horiana, and said resistance is encoded by a first resistance providing genomic region, gene, or allele genetically linked to SEQ ID NO: 2 and a second resistance providing genomic region, gene, or allele, genetically linked to SEQ ID NO: 1.

7. A seed, plant part, or plant cell of the Chrysanthemum plant of claim 1, wherein the seed, plant part, or plant cell is resistant to white rust and comprises in its genome SEQ ID NO: 2.

8. A seed, plant part, or plant cell of the Chrysanthemum plant of claim 4, wherein the seed, plant part, or plant cell is resistant to white rust and comprises in its genome SEQ ID NO: 2.

9. A Chrysanthemum plant grown from seed deposited under NCIMB Accession No. 42455, wherein the Chrysanthemum plant is resistant to white rust and comprises in its genome SEQ ID NO: 2.

10. A seed, plant part, or plant cell of the Chrysanthemum plant of claim 9, wherein the seed, plant part, or plant cell is resistant to white rust and comprises in its genome SEQ ID NO: 2.

Description

EXAMPLE

Introduction

(1) Martin, P., & Firman, I. (1970). Resistance of Chrysanthemum Cultivars to White Rust (Puccinia horiana). Plant Pathology, 180-184 discloses several varieties of Chrysantemum white rust resistant plants. In order to asses whether the present genomic sequences linked white rust, i.e. SEQ ID Nos 1 and 2, are found in the disclosed chrysanthemum cultivars, these cultivars were subjected to marker analyses and the results are presented in Table 1 below:

(2) TABLE-US-00001 TABLE 1 Phenotype after inoculation with NL1 isolate of P. horiana of Chrysanthemum varieties previously reported by Martin (1970) to be resistant or immune to P. horiana. Phenotype according to Martin SEQ ID SEQ ID Variety (1970) Phenotype No. 1.sup.2 No. 2 Alec Bedser Immune N.t. .sup.1 Fred Shoesmith Immune Susceptible Marlene Immune Susceptible Polaris Immune Susceptible Regalia Immune N.t. + Streamer Immune Susceptible N.t. N.t. Sweetheart Immune Susceptible Target Immune N.t. Vibrant.sup.4 Immune N.t. N.t. N.t. Bravo Moderate Susceptible N.t. N.t. resistant Corsair Practically Susceptible immune Discovery Practically Susceptible immune Glamour Practically Resistant + immune Rivalry Practically Susceptible immune .sup.1 N.t. = not tested .sup.2: SEQ ID is not present, +: gene is present
As can be clearly seen, none of the above plants disclosed in Martin et al., comprise a genomic sequence represented by SEQ ID No. 2.