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Zhang H, Liu X, Zhou J, Strelkov SE, Fredua-Agyeman R, Zhang S, Li F, Li G, Wu J, Sun R, Hwang SF, Zhang S. Identification of Clubroot ( Plasmodiophora brassicae) Resistance Loci in Chinese Cabbage ( Brassica rapa ssp. pekinensis) with Recessive Character. Genes (Basel) 2024; 15:274. [PMID: 38540333 PMCID: PMC10970103 DOI: 10.3390/genes15030274] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2024] [Revised: 02/17/2024] [Accepted: 02/20/2024] [Indexed: 06/15/2024] Open
Abstract
The soil-borne pathogen Plasmodiophora brassicae is the causal agent of clubroot, a major disease in Chinese cabbage (Brassica rapa ssp. pekinensis). The host's resistance genes often confer immunity to only specific pathotypes and may be rapidly overcome. Identification of novel clubroot resistance (CR) from germplasm sources is necessary. In this study, Bap246 was tested by being crossed with different highly susceptible B. rapa materials and showed recessive resistance to clubroot. An F2 population derived from Bap246 × Bac1344 was used to locate the resistance Quantitative Trait Loci (QTL) by Bulk Segregant Analysis Sequencing (BSA-Seq) and QTL mapping methods. Two QTL on chromosomes A01 (4.67-6.06 Mb) and A08 (10.42-11.43 Mb) were found and named Cr4Ba1.1 and Cr4Ba8.1, respectively. Fifteen and eleven SNP/InDel markers were used to narrow the target regions in the larger F2 population to 4.67-5.17 Mb (A01) and 10.70-10.84 Mb (A08), with 85 and 19 candidate genes, respectively. The phenotypic variation explained (PVE) of the two QTL were 30.97% and 8.65%, respectively. Combined with gene annotation, mutation site analysis, and real-time quantitative polymerase chain reaction (qRT-PCR) analysis, one candidate gene in A08 was identified, namely Bra020861. And an insertion and deletion (InDel) marker (co-segregated) named Crr1-196 was developed based on the gene sequence. Bra013275, Bra013299, Bra013336, Bra013339, Bra013341, and Bra013357 in A01 were the candidate genes that may confer clubroot resistance in Chinese cabbage. The resistance resource and the developed marker will be helpful in Brassica breeding programs.
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Affiliation(s)
- Hui Zhang
- State Key Laboratory of Vegetable Biobreeding, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing 100081, China; (H.Z.); (X.L.); (J.Z.); (S.Z.); (F.L.); (G.L.); (J.W.); (R.S.)
| | - Xitong Liu
- State Key Laboratory of Vegetable Biobreeding, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing 100081, China; (H.Z.); (X.L.); (J.Z.); (S.Z.); (F.L.); (G.L.); (J.W.); (R.S.)
| | - Jinyan Zhou
- State Key Laboratory of Vegetable Biobreeding, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing 100081, China; (H.Z.); (X.L.); (J.Z.); (S.Z.); (F.L.); (G.L.); (J.W.); (R.S.)
| | - Stephen E. Strelkov
- Department of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton, AB T6G 2P5, Canada; (S.E.S.); (R.F.-A.)
| | - Rudolph Fredua-Agyeman
- Department of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton, AB T6G 2P5, Canada; (S.E.S.); (R.F.-A.)
| | - Shifan Zhang
- State Key Laboratory of Vegetable Biobreeding, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing 100081, China; (H.Z.); (X.L.); (J.Z.); (S.Z.); (F.L.); (G.L.); (J.W.); (R.S.)
| | - Fei Li
- State Key Laboratory of Vegetable Biobreeding, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing 100081, China; (H.Z.); (X.L.); (J.Z.); (S.Z.); (F.L.); (G.L.); (J.W.); (R.S.)
| | - Guoliang Li
- State Key Laboratory of Vegetable Biobreeding, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing 100081, China; (H.Z.); (X.L.); (J.Z.); (S.Z.); (F.L.); (G.L.); (J.W.); (R.S.)
| | - Jian Wu
- State Key Laboratory of Vegetable Biobreeding, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing 100081, China; (H.Z.); (X.L.); (J.Z.); (S.Z.); (F.L.); (G.L.); (J.W.); (R.S.)
| | - Rifei Sun
- State Key Laboratory of Vegetable Biobreeding, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing 100081, China; (H.Z.); (X.L.); (J.Z.); (S.Z.); (F.L.); (G.L.); (J.W.); (R.S.)
| | - Sheau-Fang Hwang
- Department of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton, AB T6G 2P5, Canada; (S.E.S.); (R.F.-A.)
| | - Shujiang Zhang
- State Key Laboratory of Vegetable Biobreeding, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing 100081, China; (H.Z.); (X.L.); (J.Z.); (S.Z.); (F.L.); (G.L.); (J.W.); (R.S.)
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Salih R, Brochu AS, Labbé C, Strelkov SE, Franke C, Bélanger R, Pérez-López E. A Hydroponic-Based Bioassay to Facilitate Plasmodiophora brassicae Phenotyping. PLANT DISEASE 2024; 108:131-138. [PMID: 37536345 DOI: 10.1094/pdis-05-23-0959-re] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/05/2023]
Abstract
Clubroot, caused by the obligate parasite Plasmodiophora brassicae, is one of the most devastating diseases affecting the canola/oilseed rape (Brassica napus) industry worldwide. Currently, the planting of clubroot-resistant (CR) cultivars is the most effective strategy used to restrict the spread and the economic losses linked to the disease. However, virulent P. brassicae isolates have been able to infect many of the currently available CR cultivars, and the options to manage the disease are becoming limited. Another challenge has been achieving consistency in evaluating host reactions to P. brassicae infection, with most bioassays conducted in soil and/or potting medium, which requires significant space and can be labor intensive. Visual scoring of clubroot symptom development can also be influenced by user bias. Here, we have developed a hydroponic bioassay using well-characterized P. brassicae single-spore isolates representative of clubroot virulence in Canada, as well as field isolates from three Canadian provinces in combination with canola inbred homozygous lines carrying resistance genetics representative of CR cultivars available to growers in Canada. To improve the efficiency and consistency of disease assessment, symptom severity scores were compared with clubroot evaluations based on the scanned root area. According to the results, this bioassay offers a reliable, less expensive, and reproducible option to evaluate P. brassicae virulence, as well as to identify which canola resistance profile(s) may be effective against particular isolates. This bioassay will contribute to the breeding of new CR canola cultivars and the identification of virulence genes in P. brassicae that could trigger resistance and that have been very elusive to this day.[Formula: see text] Copyright © 2024 The Author(s). This is an open access article distributed under the CC BY-NC-ND 4.0 International license.
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Affiliation(s)
- Rasha Salih
- Départment de Phytologie, Faculté des Sciences de l'Agriculture et de l'Alimentation, Université Laval, Quebec City, Quebec, Canada
- Centre de Recherche et d'Innovation sur les Végétaux (CRIV), Université Laval, Quebec City, Quebec, Canada
- Institute de Biologie Intégrative et des Systèmes (IBIS), Université Laval, Quebec City, Quebec, Canada
| | - Anne-Sophie Brochu
- Départment de Phytologie, Faculté des Sciences de l'Agriculture et de l'Alimentation, Université Laval, Quebec City, Quebec, Canada
- Centre de Recherche et d'Innovation sur les Végétaux (CRIV), Université Laval, Quebec City, Quebec, Canada
- Institute de Biologie Intégrative et des Systèmes (IBIS), Université Laval, Quebec City, Quebec, Canada
| | - Caroline Labbé
- Départment de Phytologie, Faculté des Sciences de l'Agriculture et de l'Alimentation, Université Laval, Quebec City, Quebec, Canada
- Centre de Recherche et d'Innovation sur les Végétaux (CRIV), Université Laval, Quebec City, Quebec, Canada
| | - Stephen E Strelkov
- Department of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton, AB T6G 2P5, Canada
| | - Coreen Franke
- Nutrien Ag Solutions Canada, Saskatoon, SK S4N 4L8, Canada
| | - Richard Bélanger
- Départment de Phytologie, Faculté des Sciences de l'Agriculture et de l'Alimentation, Université Laval, Quebec City, Quebec, Canada
- Centre de Recherche et d'Innovation sur les Végétaux (CRIV), Université Laval, Quebec City, Quebec, Canada
- Institute de Biologie Intégrative et des Systèmes (IBIS), Université Laval, Quebec City, Quebec, Canada
| | - Edel Pérez-López
- Départment de Phytologie, Faculté des Sciences de l'Agriculture et de l'Alimentation, Université Laval, Quebec City, Quebec, Canada
- Centre de Recherche et d'Innovation sur les Végétaux (CRIV), Université Laval, Quebec City, Quebec, Canada
- Institute de Biologie Intégrative et des Systèmes (IBIS), Université Laval, Quebec City, Quebec, Canada
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Genetic Diversity and DNA Fingerprinting in Broccoli Carrying Multiple Clubroot Resistance Genes Based on SSR Markers. APPLIED SCIENCES-BASEL 2022. [DOI: 10.3390/app12094754] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
To identify cultivars quickly and accurately, DNA fingerprinting of 10 broccoli varieties was performed by using simple sequence repeat (SSR) marker technology. Highly informative and polymorphic SSR markers were screened using broccoli and rapeseed. Out of the 93 SSR marker pairs, 21 pairs were selected and found to have good polymorphism. Each marker pair generated 1 to 10 polymorphic bands with an average of 4.29. The average polymorphism information content (PIC) was 0.41 with a range from 0.16 to 0.95. Six selected marker pairs established the fingerprinting of the 10 accessions and their unique fingerprints. Cluster analysis of 10 accessions showed that the genetic similarity coefficient was between 0.57 and 0.91. They can be divided into 3 groups at the genetic similarity coefficient (GSC) of 0.73. The above results indicated that DNA fingerprinting could provide a scientific basis for the identification of broccoli polymerized multiple clubroot resistance genes. Research shows that SSR marker-based DNA fingerprinting further ensures plant seed purity.
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