Cloning and characterization of chromosomal markers in alfalfa (Medicago sativa L.). 2013

Feng Yu, and Yunting Lei, and Yuan Li, and Quanwen Dou, and Haiqing Wang, and Zhiguo Chen
Key Laboratory of Adaptation and Evolution of Plateau Biota, Northwest Plateau Institute of Biology, Chinese Academy of Sciences, Xining 810001, China.

Eleven tandemly repetitive sequences were identified from a Cot-1 library by FISH and sequence analysis of alfalfa (Medicago sativa). Five repetitive sequences (MsCR-1, MsCR-2, MsCR-3, MsCR-4, and MsCR-5) were centromeric or pericentromeric, of which three were satellite DNAs and two were minisatellite DNAs. Monomers of 144, 148, and 168 bp were identified in MsCR-1, MsCR-2, and MsCR-3, respectively, while 15 and 39 bp monomers were identified in MsCR-4 and MsCR-5, respectively. Three repetitive sequences were characterized as subtelomeric; one repetitive sequence, MsTR-1, had a 184 bp monomer, and two repetitive sequences had fragments of 204 and 327 bp. Sequence analysis revealed homology (70-80 %) between MsTR-1 and a highly repeated sequence (C300) isolated from M. ssp. caerulea. Three identified repetitive sequences produced hybridization signals at multiple sites in a few of the chromosomes; one repetitive sequence was identified as the E180 satellite DNA previously isolated from M. sativa, while the other 163 and 227 bp fragments had distinct sequences. Physical mapping of the repetitive sequences with double-target FISH revealed different patterns. Thus, nine novel tandemly repetitive sequences that can be adopted as distinct chromosome markers in alfalfa were identified in this study. Furthermore, the chromosome distribution of each sequence was well described. Though significant chromosome variations were detected within and between cultivars, a molecular karyotype of alfalfa was suggested with the chromosome markers we identified. Therefore, these novel chromosome markers will still be a powerful tool for genome composition analysis, phylogenetic studies, and breeding applications.

UI MeSH Term Description Entries
D003001 Cloning, Molecular The insertion of recombinant DNA molecules from prokaryotic and/or eukaryotic sources into a replicating vehicle, such as a plasmid or virus vector, and the introduction of the resultant hybrid molecules into recipient cells without altering the viability of those cells. Molecular Cloning
D004276 DNA, Satellite Highly repetitive DNA sequences found in HETEROCHROMATIN, mainly near centromeres. They are composed of simple sequences (very short) (see MINISATELLITE REPEATS) repeated in tandem many times to form large blocks of sequence. Additionally, following the accumulation of mutations, these blocks of repeats have been repeated in tandem themselves. The degree of repetition is on the order of 1000 to 10 million at each locus. Loci are few, usually one or two per chromosome. They were called satellites since in density gradients, they often sediment as distinct, satellite bands separate from the bulk of genomic DNA owing to a distinct BASE COMPOSITION. Satellite DNA,Satellite I DNA,DNA, Satellite I,DNAs, Satellite,DNAs, Satellite I,I DNA, Satellite,I DNAs, Satellite,Satellite DNAs,Satellite I DNAs
D000455 Medicago sativa A plant species of the family FABACEAE widely cultivated for ANIMAL FEED. Alfalfa,Lucerne
D015723 Gene Library A large collection of DNA fragments cloned (CLONING, MOLECULAR) from a given organism, tissue, organ, or cell type. It may contain complete genomic sequences (GENOMIC LIBRARY) or complementary DNA sequences, the latter being formed from messenger RNA and lacking intron sequences. DNA Library,cDNA Library,DNA Libraries,Gene Libraries,Libraries, DNA,Libraries, Gene,Libraries, cDNA,Library, DNA,Library, Gene,Library, cDNA,cDNA Libraries
D017404 In Situ Hybridization, Fluorescence A type of IN SITU HYBRIDIZATION in which target sequences are stained with fluorescent dye so their location and size can be determined using fluorescence microscopy. This staining is sufficiently distinct that the hybridization signal can be seen both in metaphase spreads and in interphase nuclei. FISH Technique,Fluorescent in Situ Hybridization,Hybridization in Situ, Fluorescence,FISH Technic,Hybridization in Situ, Fluorescent,In Situ Hybridization, Fluorescent,FISH Technics,FISH Techniques,Technic, FISH,Technics, FISH,Technique, FISH,Techniques, FISH
D017422 Sequence Analysis, DNA A multistage process that includes cloning, physical mapping, subcloning, determination of the DNA SEQUENCE, and information analysis. DNA Sequence Analysis,Sequence Determination, DNA,Analysis, DNA Sequence,DNA Sequence Determination,DNA Sequence Determinations,DNA Sequencing,Determination, DNA Sequence,Determinations, DNA Sequence,Sequence Determinations, DNA,Analyses, DNA Sequence,DNA Sequence Analyses,Sequence Analyses, DNA,Sequencing, DNA
D059785 Karyotype The full set of CHROMOSOMES presented as a systematized array of METAPHASE chromosomes from a photomicrograph of a single CELL NUCLEUS arranged in pairs in descending order of size and according to the position of the CENTROMERE. (From Stedman, 25th ed) Karyotypes
D020080 Tandem Repeat Sequences Copies of DNA sequences which lie adjacent to each other in the same orientation (direct tandem repeats) or in the opposite direction to each other (INVERTED TANDEM REPEATS). Direct Tandem Repeats,Tandem Repeat,Tandem Repeats,Direct Tandem Repeat,Repeat Sequence, Tandem,Repeat Sequences, Tandem,Repeat, Direct Tandem,Repeat, Tandem,Repeats, Direct Tandem,Repeats, Tandem,Sequence, Tandem Repeat,Sequences, Tandem Repeat,Tandem Repeat Sequence,Tandem Repeat, Direct,Tandem Repeats, Direct
D020161 Physical Chromosome Mapping Mapping of the linear order of genes on a chromosome with units indicating their distances by using methods other than genetic recombination. These methods include nucleotide sequencing, overlapping deletions in polytene chromosomes, and electron micrography of heteroduplex DNA. (From King & Stansfield, A Dictionary of Genetics, 5th ed) Chromosome Mapping, Physical,Physical Mapping (Genetics),Chromosome Mappings, Physical,Mapping, Physical Chromosome,Mappings, Physical Chromosome,Physical Chromosome Mappings,Physical Mappings (Genetics)
D032461 Chromosomes, Plant Complex nucleoprotein structures which contain the genomic DNA and are part of the CELL NUCLEUS of PLANTS. Chromosome, Plant,Plant Chromosome,Plant Chromosomes

Related Publications

Feng Yu, and Yunting Lei, and Yuan Li, and Quanwen Dou, and Haiqing Wang, and Zhiguo Chen
January 2006, Methods in molecular biology (Clifton, N.J.),
Feng Yu, and Yunting Lei, and Yuan Li, and Quanwen Dou, and Haiqing Wang, and Zhiguo Chen
January 2015, Methods in molecular biology (Clifton, N.J.),
Feng Yu, and Yunting Lei, and Yuan Li, and Quanwen Dou, and Haiqing Wang, and Zhiguo Chen
November 2011, Applied biochemistry and biotechnology,
Feng Yu, and Yunting Lei, and Yuan Li, and Quanwen Dou, and Haiqing Wang, and Zhiguo Chen
July 2013, Molecular biology reports,
Feng Yu, and Yunting Lei, and Yuan Li, and Quanwen Dou, and Haiqing Wang, and Zhiguo Chen
October 1997, Ancient science of life,
Feng Yu, and Yunting Lei, and Yuan Li, and Quanwen Dou, and Haiqing Wang, and Zhiguo Chen
May 2023, Virology journal,
Feng Yu, and Yunting Lei, and Yuan Li, and Quanwen Dou, and Haiqing Wang, and Zhiguo Chen
January 1995, Plant cell reports,
Feng Yu, and Yunting Lei, and Yuan Li, and Quanwen Dou, and Haiqing Wang, and Zhiguo Chen
January 2016, Protein and peptide letters,
Feng Yu, and Yunting Lei, and Yuan Li, and Quanwen Dou, and Haiqing Wang, and Zhiguo Chen
January 2006, Biochimica et biophysica acta,
Feng Yu, and Yunting Lei, and Yuan Li, and Quanwen Dou, and Haiqing Wang, and Zhiguo Chen
February 1997, Plant molecular biology,
Copied contents to your clipboard!