Molecular mapping of a male fertility restorer locus of Brassica oleracea using expressed sequence tag-based single nucleotide polymorphism markers and analysis of a syntenic region in Arabidopsis thaliana for identification of genes encoding pentatricopeptide repeat proteins

Ashutosh, Bhavana Sharma, Tomotaka Shinada, Yasuko Kifuji, Hiroyasu Kitashiba, Takeshi Nishio

    Research output: Contribution to journalArticlepeer-review

    12 Citations (Scopus)

    Abstract

    An F2 population was developed from a cross between a mur-cytoplasmic male sterile broccoli line and a restorer Chinese kale line. Phenotypic analysis of F2 plants indicated that the pollen fertility is controlled by two genes and segregated in a duplicate gene interaction mode with a ratio of 15:1. A total of 236 single nucleotide polymorphism (SNP) markers were developed utilizing 1,448 primers designed for production of expressed sequence tag (EST)-SNP markers of Raphanus sativus and analyzed by the dot-blot technique in 205 F2 individuals. A linkage map was constructed with a total of 142 markers and these markers were assigned to nine linkage groups together with simple sequence repeat markers mapped previously on the published linkage maps of Brassica oleracea. The linkage map spanned 909 cM with an average marker distance of 6.4 cM. A fertility restorer locus (Rfm1) was mapped on LG1, corresponding to chromosome 3, along with a flower color locus at a distance of 25 cM. SNP markers flanking the Rfm1 locus were BoCL2642s at a distance of 2.5 cM on one side and BoCL2901s at a distance of 7.5 cM on the other side. All the SNP markers showed homology with Arabidopsis thaliana and Brassica rapa genome sequences. Three pentatricopeptide repeat genes of the P-subfamily, particularly expressed in buds of the restorer line, were identified and these genes could be potential candidate fertility restorer genes.

    Original languageEnglish
    Pages (from-to)1781-1792
    Number of pages12
    JournalMolecular Breeding
    Volume30
    Issue number4
    DOIs
    Publication statusPublished - 2012 Nov

    Keywords

    • Cytoplasmic male sterility
    • Diplotaxis muralis
    • Fertility restorer locus
    • Linkage map
    • PPR genes
    • Synteny

    ASJC Scopus subject areas

    • Biotechnology
    • Molecular Biology
    • Agronomy and Crop Science
    • Genetics
    • Plant Science

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