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  • Electronic Resource  (2)
  • Key wordsOryza sativa  (1)
  • Key words Hordeum vulgare  (1)
  • 1
    ISSN: 1432-203X
    Keywords: Key wordsOryza sativa ; Random amplified polymorphic DNA ; Polymerase chain reaction ; Somaclonal variation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A procedure for the non-radioactive detection of random amplified polymorphic DNA (RAPD) was developed and designated as digoxigenin (DIG)-based RAPD. Using this procedure, we analyzed somaclonal variation in cultured cells of rice. Somaclonal variation was found to increase with culture age. More than 50 polymorphic fragments were identified with the four primers tested. Random sequencing of 10 clones generated one intron, one 5′-noncoding, and eight non-redundant expressed sequences. A database search for homology showed that the eight exon sequences displayed a significant similarity to sequences already stored in EMBL, GenBank and DDBJ. The sources of the known genes ranged from microorganism to human, including three rice genes. The results showed that somaclonal variation might have occurred in transfer RNA, ribosomal protein, and other genes during cell culture.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-2242
    Keywords: Key words Hordeum vulgare ; Linkage map ; Recombinant inbred ; Sequence-tagged site (STS)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract  In order to identify sequence-tagged sites (STSs) appropriate for recombinant inbred lines (RILs) of barley cultivars ‘Azumamugi’ × ‘Kanto Nakate Gold’, a total of 43 STS primer pairs were generated on the basis of the terminal sequences of barley restriction fragment length polymorphism (RFLP) clones. Forty one of the 43 primer pairs amplified PCR products in Azumamugi, Kanto Nakate Gold, or both. Of these, two showed a length polymorphism and two showed the presence or absence of polymorphism between the parents. PCR products of the remaining 37 primers were digested with 46 restriction endonucleases, and polymorphisms were detected for 15 primers. A 383.6-cM linkage map of RILs of Azumamugi×Kanto Nakate Gold was constructed from the 19 polymorphic STS primer pairs (20 loci) developed in this study, 45 previously developed STS primer pairs (47 loci), and two morphological loci. Linkage analysis and analysis of wheat-barley chromosome addition lines showed that with three exceptions, the chromosome locations of the STS markers were identical with those of the RFLP markers.
    Type of Medium: Electronic Resource
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