Abstract
A novel genic male sterile (GMS) line in Brassica napus L., which was identified in 1999, was found to be controlled by a monogenic dominant gene, which we have designated as MDGMS. The microspores of the MDGMS abort before the degradation of the tapetal cell layer. The F1 fertility from any fertile lines crossed with MDGMS segregated and the ratio was close to 1:1. Bulked segregation analysis (BSA) was employed to identify random amplified polymorphic DNA (RAPD) markers linked to the Ms gene in MDGMS. Among 880 random 10-mer oligonucleotide primers screened against the bulk DNA of sterile and fertile, one primer S243 (5′-CTATGCCGAC-3′) gave a repeatable 1500-bp DNA polymorphic segment S2431500 between the two bulks. Analysis of individual plants of each bulks and other types of GMS and cytoplasmic male sterility (CMS) lines suggest that the RAPD marker S2431500 is closely linked to the MDGMS locus in rapeseed. This RAPD marker has been converted into sequence characterized amplified region (SCAR) marker to aid identification of male-fertility genotypes in segregating progenies of MDGMS in marker-assisted selection (MAS) breeding programs.
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Abbreviations
- BSA:
-
Bulked segregation analysis
- CMS:
-
Cytoplasmic male sterility
- GMS:
-
Genic male sterility
- MAS:
-
Marker assisted selection
- MDGMS:
-
Monogenic dominant GMS
- PCR:
-
Polymerase chain reaction
- RAPD:
-
Random amplified polymorphic DNA
- SCAR:
-
Sequence characterized amplified region
- STS:
-
Sequence tagged site
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Acknowledgments
We thank Dr. W.X. Shan of Northwest A&F University and Dr. X.L. Tan of Jiangsu University for the critical reading of the manuscript and their helpful comments. This work was supported by the Chinese National Progress for “863” (No. 2001AA241111) and Nature Science Foundation of Shaanxi Province (No. 2004C108).
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Communicated by R. J. Rose
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Wang, DJ., Guo, AG., Li, DR. et al. Cytological and molecular characterization of a novel monogenic dominant GMS in Brassica napus L.. Plant Cell Rep 26, 571–579 (2007). https://doi.org/10.1007/s00299-006-0276-5
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DOI: https://doi.org/10.1007/s00299-006-0276-5