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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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Rahaman M, Strelkov SE, Hu H, Gossen BD, Yu F. Identification of a genomic region containing genes involved in resistance to four pathotypes of Plasmodiophora brassicae in Brassica rapa turnip ECD02. THE PLANT GENOME 2022; 15:e20245. [PMID: 35971879 DOI: 10.1002/tpg2.20245] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Accepted: 06/08/2022] [Indexed: 06/15/2023]
Abstract
Clubroot, caused by Plasmodiophora brassicae, is an important disease of brassica crops worldwide. Vegetable turnip (Brassica rapa L.) have proven to be a source of clubroot resistance genes effective against many pathotypes of P. brassicae. The F1 progeny from the cross B. rapa canola ACDC (susceptible, S) × B. rapa turnip ECD02 (resistant, R) were backcrossed with ACDC, then self-pollinated to produce BC1 S1 lines. All the F1 plants were resistant to four pathotypes (3A, 3D, 3H, and 5X) of P. brassicae. Segregation for R and S in BC1 to each pathotype was 1:1 and resistance reactions were highly correlated. From whole genome sequencing, 192.1 M sequences with 96% template coverage from ECD02, and 478.9 M sequences with 92% coverage from ACDC, were aligned with the reference genome of B. rapa. Genotyping-by-sequencing was performed on the BC1 population. The number of aligned short reads per plant in the BC1 ranged from 1.4 to 8.5 M sequences with 4-8% template coverage. We obtained 1,344 high-quality single-nucleotide polymorphism (SNP) loci with a mean missing rate at 0.27% and distributed them on 10 chromosomes. A single co-localized quantitative trait loci (QTL), designated as Rcr9ECD02 on chromosome A08, conferred resistance to the four pathotypes. The QTL explained 68.9-74.4% of phenotypic variation with the logarithm of the odds values of 24.3 to 31.1. Bulked segregant analysis was performed, and 14 SNP markers linked to the gene were developed using the Kompetitive Allele Specific PCR. Rcr9ECD02 was mapped into an interval of 2.2 cM, flanked by CF_A08_10664692 and CF_A08_12230973, which spanned 1.51 Mb on the chromosome and included 219 B. rapa genes. Four of these genes (BraA08g012910.3C, BraA08g012920.3C, BraA08g013130.3C, and BraA08g013630.3C) encoded disease resistance proteins.
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Affiliation(s)
- Mizanur Rahaman
- Saskatoon Research and Development Centre, Agriculture and Agri-Food Canada, Saskatoon, SK, S7N 0X2, Canada
| | - Stephen E Strelkov
- Dep. of Agricultural, Food and Nutritional Science, Univ. of Alberta, Edmonton, AB, T6G 2P5, Canada
| | - Hao Hu
- Saskatoon Research and Development Centre, Agriculture and Agri-Food Canada, Saskatoon, SK, S7N 0X2, Canada
| | - Bruce D Gossen
- Saskatoon Research and Development Centre, Agriculture and Agri-Food Canada, Saskatoon, SK, S7N 0X2, Canada
| | - Fengqun Yu
- Saskatoon Research and Development Centre, Agriculture and Agri-Food Canada, Saskatoon, SK, S7N 0X2, Canada
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Karim MM, Dakouri A, Zhang Y, Chen Q, Peng G, Strelkov SE, Gossen BD, Yu F. Two Clubroot-Resistance Genes, Rcr3 and Rcr9wa, Mapped in Brassica rapa Using Bulk Segregant RNA Sequencing. Int J Mol Sci 2020; 21:ijms21145033. [PMID: 32708772 PMCID: PMC7404267 DOI: 10.3390/ijms21145033] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2020] [Revised: 07/13/2020] [Accepted: 07/14/2020] [Indexed: 11/24/2022] Open
Abstract
Genetic resistance is widely used to manage clubroot (Plasmodiophora brassicae) in brassica crops, but new pathotypes have recently been identified on canola (Brassica napus) on the Canadian prairies. Resistance effective against both the most prevalent pathotype (3H, based on the Canadian Clubroot Differential system) and the new pathotypes is needed. BC1 plants of Brassica rapa from a cross of line 96-6990-2 (clubroot resistance originating from turnip cultivar ‘Waaslander’) and a susceptible doubled-haploid line, ACDC, exhibited a 1:1 segregation for resistance against pathotypes 3H and 5X. A resistance gene designated as Rcr3 was mapped initially based on the percentage of polymorphic variants using bulked segregant RNA sequencing (BSR-Seq) and further mapped using Kompetitive Allele Specific PCR. DNA variants were identified by assembling short reads against a reference genome of B. rapa. Rcr3 was mapped into chromosome A08. It was flanked by single nucleotide polymorphisms (SNP) markers (A90_A08_SNP_M12 and M16) between 10.00 and 10.23 Mb, in an interval of 231.6 Kb. There were 32 genes in the Rcr3 interval. Three genes (Bra020951, Bra020974, and Bra020979) were annotated with disease resistance mechanisms, which are potential candidates for Rcr3. Another resistance gene, designated as Rcr9wa, for resistance to pathotype 5X was mapped, with the flanking markers (A90_A08_SNP_M28 and M79) between 10.85 and 11.17 Mb using the SNP sites identified through BSR-Seq for Rcr3. There were 44 genes in the Rcr9wa interval, three of which (Bra020827, Bra020828, Bra020814) were annotated as immune-system-process related genes, which are potential candidates for Rcr9wa.
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Affiliation(s)
- Md. Masud Karim
- Agriculture and Agri-Food Canada, Saskatoon Research and Development Centre, 107 Science Place, Saskatoon, SK S7N OX2, Canada; (M.M.K.); (A.D.); (Y.Z.); (Q.C.); (G.P.); (B.D.G.)
| | - Abdulsalam Dakouri
- Agriculture and Agri-Food Canada, Saskatoon Research and Development Centre, 107 Science Place, Saskatoon, SK S7N OX2, Canada; (M.M.K.); (A.D.); (Y.Z.); (Q.C.); (G.P.); (B.D.G.)
| | - Yan Zhang
- Agriculture and Agri-Food Canada, Saskatoon Research and Development Centre, 107 Science Place, Saskatoon, SK S7N OX2, Canada; (M.M.K.); (A.D.); (Y.Z.); (Q.C.); (G.P.); (B.D.G.)
| | - Qilin Chen
- Agriculture and Agri-Food Canada, Saskatoon Research and Development Centre, 107 Science Place, Saskatoon, SK S7N OX2, Canada; (M.M.K.); (A.D.); (Y.Z.); (Q.C.); (G.P.); (B.D.G.)
| | - Gary Peng
- Agriculture and Agri-Food Canada, Saskatoon Research and Development Centre, 107 Science Place, Saskatoon, SK S7N OX2, Canada; (M.M.K.); (A.D.); (Y.Z.); (Q.C.); (G.P.); (B.D.G.)
| | - Stephen E. Strelkov
- Department of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton, AB T6G 2P5, Canada;
| | - Bruce D. Gossen
- Agriculture and Agri-Food Canada, Saskatoon Research and Development Centre, 107 Science Place, Saskatoon, SK S7N OX2, Canada; (M.M.K.); (A.D.); (Y.Z.); (Q.C.); (G.P.); (B.D.G.)
| | - Fengqun Yu
- Agriculture and Agri-Food Canada, Saskatoon Research and Development Centre, 107 Science Place, Saskatoon, SK S7N OX2, Canada; (M.M.K.); (A.D.); (Y.Z.); (Q.C.); (G.P.); (B.D.G.)
- Correspondence:
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Hirani AH, Gao F, Liu J, Fu G, Wu C, McVetty PBE, Duncan RW, Li G. Combinations of Independent Dominant Loci Conferring Clubroot Resistance in All Four Turnip Accessions ( Brassica rapa) From the European Clubroot Differential Set. FRONTIERS IN PLANT SCIENCE 2018; 9:1628. [PMID: 30483286 DOI: 10.3389/fpls.2015.01628] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 04/03/2018] [Accepted: 10/19/2018] [Indexed: 05/26/2023]
Abstract
Clubroot disease is devastating to Brassica crop production when susceptible cultivars are planted in infected fields. European turnips are the most resistant sources and their resistance genes have been introduced into other crops such oilseed rape (Brassica napus L.), Chinese cabbage and other Brassica vegetables. The European clubroot differential (ECD) set contains four turnip accessions (ECD1-4). These ECD turnips exhibited high levels of resistance to clubroot when they were tested under controlled environmental conditions with Canadian field isolates. Gene mapping of the clubroot resistance genes in ECD1-4 were performed and three independent dominant resistance loci were identified. Two resistance loci were mapped on chromosome A03 and the third on chromosome A08. Each ECD turnip accession contained two of these three resistance loci. Some resistance loci were homozygous in ECD accessions while others showed heterozygosity based on the segregation of clubroot resistance in 20 BC1 families derived from ECD1 to 4. Molecular markers were developed linked to each clubroot resistance loci for the resistance gene introgression in different germplasm.
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Affiliation(s)
- Arvind H Hirani
- Department of Plant Science, University of Manitoba, Winnipeg, MB, Canada
| | - Feng Gao
- Department of Plant Science, University of Manitoba, Winnipeg, MB, Canada
| | - Jun Liu
- Monsanto Canada Inc., Winnipeg MB, Canada
| | - Guohua Fu
- Monsanto Canada Inc., Winnipeg MB, Canada
| | - Chunren Wu
- Monsanto Canada Inc., Winnipeg MB, Canada
| | - Peter B E McVetty
- Department of Plant Science, University of Manitoba, Winnipeg, MB, Canada
| | - Robert W Duncan
- Department of Plant Science, University of Manitoba, Winnipeg, MB, Canada
| | - Genyi Li
- Department of Plant Science, University of Manitoba, Winnipeg, MB, Canada
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Nguyen ML, Monakhos GF, Komakhin RA, Monakhos SG. The New Clubroot Resistance Locus Is Located on Chromosome A05 in Chinese Cabbage (Brassica rapa L.). RUSS J GENET+ 2018. [DOI: 10.1134/s1022795418030080] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Hirani AH, Gao F, Liu J, Fu G, Wu C, McVetty PBE, Duncan RW, Li G. Combinations of Independent Dominant Loci Conferring Clubroot Resistance in All Four Turnip Accessions ( Brassica rapa) From the European Clubroot Differential Set. FRONTIERS IN PLANT SCIENCE 2018; 9:1628. [PMID: 30483286 PMCID: PMC6243934 DOI: 10.3389/fpls.2018.01628] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2018] [Accepted: 10/19/2018] [Indexed: 05/12/2023]
Abstract
Clubroot disease is devastating to Brassica crop production when susceptible cultivars are planted in infected fields. European turnips are the most resistant sources and their resistance genes have been introduced into other crops such oilseed rape (Brassica napus L.), Chinese cabbage and other Brassica vegetables. The European clubroot differential (ECD) set contains four turnip accessions (ECD1-4). These ECD turnips exhibited high levels of resistance to clubroot when they were tested under controlled environmental conditions with Canadian field isolates. Gene mapping of the clubroot resistance genes in ECD1-4 were performed and three independent dominant resistance loci were identified. Two resistance loci were mapped on chromosome A03 and the third on chromosome A08. Each ECD turnip accession contained two of these three resistance loci. Some resistance loci were homozygous in ECD accessions while others showed heterozygosity based on the segregation of clubroot resistance in 20 BC1 families derived from ECD1 to 4. Molecular markers were developed linked to each clubroot resistance loci for the resistance gene introgression in different germplasm.
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Affiliation(s)
- Arvind H. Hirani
- Department of Plant Science, University of Manitoba, Winnipeg, MB, Canada
| | - Feng Gao
- Department of Plant Science, University of Manitoba, Winnipeg, MB, Canada
| | - Jun Liu
- Monsanto Canada Inc., Winnipeg MB, Canada
| | - Guohua Fu
- Monsanto Canada Inc., Winnipeg MB, Canada
| | - Chunren Wu
- Monsanto Canada Inc., Winnipeg MB, Canada
| | | | - Robert W. Duncan
- Department of Plant Science, University of Manitoba, Winnipeg, MB, Canada
| | - Genyi Li
- Department of Plant Science, University of Manitoba, Winnipeg, MB, Canada
- *Correspondence: Genyi Li, ;
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Hatakeyama K, Suwabe K, Tomita RN, Kato T, Nunome T, Fukuoka H, Matsumoto S. Identification and characterization of Crr1a, a gene for resistance to clubroot disease (Plasmodiophora brassicae Woronin) in Brassica rapa L. PLoS One 2013; 8:e54745. [PMID: 23382954 PMCID: PMC3559844 DOI: 10.1371/journal.pone.0054745] [Citation(s) in RCA: 114] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2012] [Accepted: 12/14/2012] [Indexed: 11/19/2022] Open
Abstract
Clubroot disease, caused by the obligate biotrophic protist Plasmodiophora brassicae Woronin, is one of the most economically important diseases of Brassica crops in the world. Although many clubroot resistance (CR) loci have been identified through genetic analysis and QTL mapping, the molecular mechanisms of defense responses against P. brassicae remain unknown. Fine mapping of the Crr1 locus, which was originally identified as a single locus, revealed that it comprises two gene loci, Crr1a and Crr1b. Here we report the map-based cloning and characterization of Crr1a, which confers resistance to clubroot in Brassica rapa. Crr1a(G004), cloned from the resistant line G004, encodes a Toll-Interleukin-1 receptor/nucleotide-binding site/leucine-rich repeat (TIR-NB-LRR) protein expressed in the stele and cortex of hypocotyl and roots, where secondary infection of the pathogen occurs, but not in root hairs, where primary infection occurs. Gain-of-function analysis proved that Crr1a(G004) alone conferred resistance to isolate Ano-01 in susceptible Arabidopsis and B. rapa. In comparison, the susceptible allele Crr1a(A9709) encodes a truncated NB-LRR protein, which lacked more than half of the TIR domain on account of the insertion of a solo-long terminal repeat (LTR) in exon 1 and included several substitutions and insertion-deletions in the LRR domain. This study provides a basis for further molecular analysis of defense mechanisms against P. brassicae and will contribute to the breeding of resistant cultivars of Brassica vegetables by marker-assisted selection.Data deposition The sequence reported in this paper has been deposited in the GenBank database (accession no. AB605024).
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Affiliation(s)
- Katsunori Hatakeyama
- Vegetable Breeding and Genome Research Division, NARO Institute of Vegetable and Tea Science, Tsu, Mie, Japan
| | - Keita Suwabe
- Graduate School of Bioresources, Mie University, Tsu, Mie, Japan
| | - Rubens Norio Tomita
- Vegetable Breeding and Genome Research Division, NARO Institute of Vegetable and Tea Science, Tsu, Mie, Japan
| | - Takeyuki Kato
- Vegetable Breeding and Genome Research Division, NARO Institute of Vegetable and Tea Science, Tsu, Mie, Japan
- Graduate School of Bioresources, Mie University, Tsu, Mie, Japan
| | - Tsukasa Nunome
- Vegetable Breeding and Genome Research Division, NARO Institute of Vegetable and Tea Science, Tsu, Mie, Japan
| | - Hiroyuki Fukuoka
- Vegetable Breeding and Genome Research Division, NARO Institute of Vegetable and Tea Science, Tsu, Mie, Japan
| | - Satoru Matsumoto
- Vegetable Breeding and Genome Research Division, NARO Institute of Vegetable and Tea Science, Tsu, Mie, Japan
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Ueno H, Matsumoto E, Aruga D, Kitagawa S, Matsumura H, Hayashida N. Molecular characterization of the CRa gene conferring clubroot resistance in Brassica rapa. PLANT MOLECULAR BIOLOGY 2012; 80:621-9. [PMID: 23054353 DOI: 10.1007/s11103-012-9971-5] [Citation(s) in RCA: 98] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2012] [Accepted: 09/17/2012] [Indexed: 05/23/2023]
Abstract
Clubroot disease is one of the major diseases affecting Brassicaceae crops, and a number of these crops grown commercially, such as Chinese cabbage (Brassica rapa L. ssp. pekinensis), are known to be highly susceptible to clubroot disease. To provide protection from this disease, plant breeders have introduced genes for resistance to clubroot from the European turnip into susceptible lines. The CRa gene confers specific resistance to the clubroot pathogen Plasmodiophora brassicae isolate M85. Fine mapping of the CRa locus using synteny to the Arabidopsis thaliana genome and partial genome sequences of B. rapa revealed a candidate gene encoding a TIR-NBS-LRR protein. Several structural differences in this candidate gene were found between susceptible and resistant lines, and CRa expression was observed only in the resistant line. Four mutant lines lacking clubroot resistance were obtained by the UV irradiation of pollen from a resistant line, and all of these mutant lines carried independent mutations in the candidate TIR-NBS-LRR gene. This genetic and molecular evidence strongly suggests that the identified gene is CRa. This is the first report on the molecular characterization of a clubroot Resistance gene in Brassicaceae and of the disease resistance gene in B. rapa.
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Affiliation(s)
- Hiroki Ueno
- Department of Bioscience and Textile Technology, Shinshu University, Ueda, Nagano 386-8567, Japan
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Matsumoto E, Ueno H, Aruga D, Sakamoto K, Hayashida N. Accumulation of Three Clubroot Resistance Genes through Marker-assisted Selection in Chinese Cabbage (Brassica rapa ssp. pekinensis). ACTA ACUST UNITED AC 2012. [DOI: 10.2503/jjshs1.81.184] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Nagaoka T, Doullah MAU, Matsumoto S, Kawasaki S, Ishikawa T, Hori H, Okazaki K. Identification of QTLs that control clubroot resistance in Brassica oleracea and comparative analysis of clubroot resistance genes between B. rapa and B. oleracea. TAG. THEORETICAL AND APPLIED GENETICS. THEORETISCHE UND ANGEWANDTE GENETIK 2010; 120:1335-46. [PMID: 20069415 DOI: 10.1007/s00122-010-1259-z] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2009] [Accepted: 12/14/2009] [Indexed: 05/22/2023]
Abstract
To perform comparative studies of CR (clubroot resistance) loci in Brassica oleracea and Brassica rapa and to develop marker-assisted selection in B. oleracea, we constructed a B. oleracea map, including specific markers linked to CR genes of B. rapa. We also analyzed CR-QTLs using the mean phenotypes of F(3) progenies from the cross of a resistant double-haploid line (Anju) with a susceptible double-haploid line (GC). In the nine linkage groups obtained (O1-O9), the major QTL, pb-Bo(Anju)1, was derived from Anju with a maximum LOD score (13.7) in O2. The QTL (LOD 5.1) located in O5, pb-Bo(GC)1, was derived from the susceptible GC. Other QTLs with smaller effects were found in O2, O3, and O7. Based on common markers, it was possible to compare our finding CR-QTLs with the B. oleracea CR loci reported by previous authors; pb-Bo(GC)1 may be identical to the CR-QTL reported previously or a different member contained in the same CR gene cluster. In total, the markers linked to seven B. rapa CR genes were mapped on the B. oleracea map. Based on the mapping position and markers of the CR genes, informative comparative studies of CR loci between B. oleracea and B. rapa were performed. Our map discloses specific primer sequences linked to CR genes and includes public SSR markers that will promote pyramiding CR genes in intra- and inter-specific crosses in Brassica crops. Five genes involved in glucosinolates biosynthesis were also mapped, and GSL-BoELONG and GSL-BoPro were found to be linked to the pb-Bo(Anju)1 and Bo(GC)1 loci, respectively. The linkage drag associated with the CR-QTLs is briefly discussed.
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Affiliation(s)
- T Nagaoka
- Graduate School of Science and Technology, Niigata University, Ikarashi, Niigata, 950-2181, Japan
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Sakamoto K, Saito A, Hayashida N, Taguchi G, Matsumoto E. Mapping of isolate-specific QTLs for clubroot resistance in Chinese cabbage (Brassica rapa L. ssp. pekinensis). TAG. THEORETICAL AND APPLIED GENETICS. THEORETISCHE UND ANGEWANDTE GENETIK 2008; 117:759-67. [PMID: 18612625 DOI: 10.1007/s00122-008-0817-0] [Citation(s) in RCA: 82] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2008] [Accepted: 05/22/2008] [Indexed: 05/23/2023]
Abstract
A number of clubroot resistant (CR) Chinese cabbage cultivars have been developed in Japan using resistant genes from CR European fodder turnips (B. rapa ssp. rapifera). Clubroot resistance in European fodder turnips are known to be controlled by the combined action of several dominant resistance genes. We have developed three Chinese cabbage clubroot-resistant doubled haploid (DH) lines--T136-8, K10, and C9--which express resistance in different manners against two isolates of Plasmodiophora brassicae, M85 and K04. Depending on the isolates, we identified two CR loci, CRk and CRc. CRk was identified by quantitative trait loci (QTL) analysis of an F(2) population derived from a cross between K10 and Q5. This locus showed resistance to both isolates and is located close to Crr3 in linkage group R3. The other locus, CRc was identified by QTL analysis of an F(2) population derived from a cross between C9 and susceptible DH line, 6R. This locus was mapped to linkage group R2 and is independent from any published CR loci. We developed sequence-tagged site markers linked to this locus.
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Affiliation(s)
- Koji Sakamoto
- Takii Plant Breeding and Experiment Station, Konan, Shiga 520-3231, Japan.
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Hayashida N, Takabatake Y, Nakazawa N, Aruga D, Nakanishi H, Taguchi G, Sakamoto K, Matsumoto E. Construction of a Practical SCAR Marker Linked to Clubroot Resistance in Chinese Cabbage, with Intensive Analysis of HC352b Genes. ACTA ACUST UNITED AC 2008. [DOI: 10.2503/jjshs1.77.150] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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