Genetic mapping reveals BjRf as a candidate gene controlling fertility restoration of the oxa CMS in Brassica juncea

Key message A candidate gene for male fertility restoration in Brassica juncea , BjRf , was isolated from a 23-kb interval on chromosome A05 using map-based cloning and BSA methods. The cytoplasmic male sterility/fertility restoration (CMS/ Rf ) system has been extensively used for heterosis in plan...

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Veröffentlicht in:Theoretical and applied genetics 2021-08, Vol.134 (8), p.2355-2365
Hauptverfasser: Cheng, Qiqi, Yao, Peijie, Li, Hui, Han, Yiming, Xu, Kejing, Heng, Shuangping, Fu, Tingdong, Wan, Zhengjie
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container_issue 8
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container_title Theoretical and applied genetics
container_volume 134
creator Cheng, Qiqi
Yao, Peijie
Li, Hui
Han, Yiming
Xu, Kejing
Heng, Shuangping
Fu, Tingdong
Wan, Zhengjie
description Key message A candidate gene for male fertility restoration in Brassica juncea , BjRf , was isolated from a 23-kb interval on chromosome A05 using map-based cloning and BSA methods. The cytoplasmic male sterility/fertility restoration (CMS/ Rf ) system has been extensively used for heterosis in plants. It also provides valuable resources for studying mitochondrial–nuclear coevolution and interaction. The oxa CMS, which is a new CMS type reported in Brassica juncea ( B. juncea ), has been broadly used in the exploitation and application of heterosis in this species. However, the oxa CMS fertility restorer gene BjRf has not been reported. In this study, a stable restorer line was successfully constructed via continuous testcross and artificial selection. Besides, a new Rf gene was mapped in a 23-kb region on chromosome A05 in B. juncea with a genetic distance of 0.5 cM by the method incorporating bulk segregant analysis (BSA) and conventional map-based cloning. Finally, BjuA017917 , a non-PPR Rf gene encoding a guanosine nucleotide diphosphate dissociation inhibitor (GDI), is proposed to be the candidate gene for fertility restoration of the oxa CMS line in B. juncea . Moreover, a functional marker, CRY3, was developed for marker-assisted selection for Brassica juncea breeding.
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Finally, BjuA017917 , a non-PPR Rf gene encoding a guanosine nucleotide diphosphate dissociation inhibitor (GDI), is proposed to be the candidate gene for fertility restoration of the oxa CMS line in B. juncea . 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The cytoplasmic male sterility/fertility restoration (CMS/ Rf ) system has been extensively used for heterosis in plants. It also provides valuable resources for studying mitochondrial–nuclear coevolution and interaction. The oxa CMS, which is a new CMS type reported in Brassica juncea ( B. juncea ), has been broadly used in the exploitation and application of heterosis in this species. However, the oxa CMS fertility restorer gene BjRf has not been reported. In this study, a stable restorer line was successfully constructed via continuous testcross and artificial selection. Besides, a new Rf gene was mapped in a 23-kb region on chromosome A05 in B. juncea with a genetic distance of 0.5 cM by the method incorporating bulk segregant analysis (BSA) and conventional map-based cloning. Finally, BjuA017917 , a non-PPR Rf gene encoding a guanosine nucleotide diphosphate dissociation inhibitor (GDI), is proposed to be the candidate gene for fertility restoration of the oxa CMS line in B. juncea . 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The cytoplasmic male sterility/fertility restoration (CMS/ Rf ) system has been extensively used for heterosis in plants. It also provides valuable resources for studying mitochondrial–nuclear coevolution and interaction. The oxa CMS, which is a new CMS type reported in Brassica juncea ( B. juncea ), has been broadly used in the exploitation and application of heterosis in this species. However, the oxa CMS fertility restorer gene BjRf has not been reported. In this study, a stable restorer line was successfully constructed via continuous testcross and artificial selection. Besides, a new Rf gene was mapped in a 23-kb region on chromosome A05 in B. juncea with a genetic distance of 0.5 cM by the method incorporating bulk segregant analysis (BSA) and conventional map-based cloning. Finally, BjuA017917 , a non-PPR Rf gene encoding a guanosine nucleotide diphosphate dissociation inhibitor (GDI), is proposed to be the candidate gene for fertility restoration of the oxa CMS line in B. juncea . Moreover, a functional marker, CRY3, was developed for marker-assisted selection for Brassica juncea breeding.</abstract><cop>Berlin/Heidelberg</cop><pub>Springer Berlin Heidelberg</pub><pmid>34173856</pmid><doi>10.1007/s00122-021-03767-5</doi><tpages>11</tpages><orcidid>https://orcid.org/0000-0002-0619-0429</orcidid></addata></record>
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subjects Agriculture
Biochemistry
Biomedical and Life Sciences
Biotechnology
Brassica juncea
Chromosome Mapping - methods
Chromosomes, Plant - genetics
Cloning
Coevolution
Cytoplasmic male sterility
Fertility
Gene Expression Regulation, Plant
Gene mapping
Genes
Genetic distance
Genetic research
Heterosis
Life Sciences
Male sterility
Marker-assisted selection
Mitochondria
Mustard Plant - genetics
Mustard Plant - growth & development
Mustard Plant - metabolism
Original Article
Oxalic acid
Plant Biochemistry
Plant Breeding - methods
Plant Breeding/Biotechnology
Plant Genetics and Genomics
Plant Infertility
Plant Proteins - genetics
Plant Proteins - metabolism
title Genetic mapping reveals BjRf as a candidate gene controlling fertility restoration of the oxa CMS in Brassica juncea
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