Euphytica

, Volume 200, Issue 3, pp 455–463 | Cite as

Transcript analyses of the gene associated with CMS in Brassica napus

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Abstract

We analysed DNA and complementary DNA (cDNA) from two inbred lines (CMS-ARIT121 and CMS-ARIT2) along with their respective maintainer lines with eight known genes (atpa, atp6, atp9, coxI, coxII, orfB, orf222 and orf224) reported in other cytoplasmic male sterility (CMS) systems. DNA analyses indicated that only orf224 was different in the maintainer and CMS in ARIT121. Sequencing analysis indicated that CMS-ARIT121 has a similar sequence to that of polima CMS. However, CMS-ARIT2 was quite unique, with no sequence difference at DNA or cDNA level in all eight candidate genes, with the exception of a two-base substitution in the atp6 gene between the CMS and maintainer lines. The similar amplification pattern with all primers, especially orf224, indicates that CMS-ARIT2 is unique and does not correspond to polima, ogura or nap. However, further research is required to establish the causes of sterility in this cms, since we could not find any significant difference at transcript level between CMS-ARIT2 and its corresponding maintainer line. However, the same restorer PR121 as for CMS-ARIT121 was able to restore CMS-ARIT2, and as such can be used for hybrid seed production in Brassica napus L. Overall, this study provides important information for breeders selecting new cytoplasmic male sterility (CMS) in B. napus L. and use of molecular markers to identify CMS lines at early seedling stage that will enhance the B. napus L. breeding program.

Keywords

Oilseed rape Molecular markers Cytoplasmic male sterility (CMS) Restorer of fertility Mitochondrial gene expression Mitochondrial open reading frames (ORFs) 
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Notes

Acknowledgments

The authors are grateful to Victor Wutor, Lethbridge Research Center, Agri. Food Canada and Marc Janssens, University of Bonn, Germany for technical review of the manuscript. We are also indebted to Doug Walker, Vince D’Antonio, University of California at Davis for maintaining plant material in the greenhouse and Yasir Khan for his valuable help in formatting this manuscript. We are grateful to two anonymous reviewers for their technical input.

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Copyright information

© Springer Science+Business Media Dordrecht 2014

Authors and Affiliations

  1. 1.Department of Plant SciencesUniversity of CaliforniaDavisUSA
  2. 2.Department of BiotechnologyAbdul Wali Khan UniversityMardanPakistan
  3. 3.Department of Plant Breeding and GeneticsThe University of AgriculturePeshawarPakistan

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