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  • Genetic variability  (3)
  • Avena sativa  (2)
  • Secale cereale  (1)
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  • 1
    Digitale Medien
    Digitale Medien
    The structure of the rDNA intergenic spacer of Avena sativa L.: a comparative study (1994)
    Springer
    Plant molecular biology 25 (1994), S. 751-756 
    Details
    ISSN: 1573-5028
    Schlagwort(e): Avena sativa ; oats ; rDNA intergenic spacer ; sequence ; comparative study
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract The sequence of the 18S–25S ribosomal RNA gene intergenic spacer (IGS) of Avena sativa was determined. DNA was cloned after polymerase chain reaction amplification of the IGS. The spacer of 3980 bp is composed of non-repeated sequences and five tandem arrays of repeated sequences, named A to E. Homology between oats IGS and other grass species was found. Tandem arrays D and E seem to be originated by duplication from single-copy sequences in related species. A transcription initiation site and putative sites of termination, processing and methylation were detected by computer-aided search. These sites resemble motifs conserved in the IGS of plant species.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00029613
    Standort Signatur Erwartet Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Extent of genetic variability of endosperm esterases in Triticum aestivum L. 2n=6x=42 (1989)
    Springer
    Theoretical and applied genetics 78 (1989), S. 728-734 
    Details
    ISSN: 1432-2242
    Schlagwort(e): Esterases ; Genetic variability ; Triticum aestivum
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Summary Genetic variability of endosperm esterase has been studied in 42 cultivars of Triticum aestivum L. 2n=6x=42. Different techniques, including sequential electrophoresis and electrofocusing, have been used with various substrates and esterase inhibitors. The electrophoretic patterns in each cultivar are described. Chromosomal location using the nullitetrasomic and ditelosomic lines of Chinese Spring was carried out in order to relate and/or locate the esterase genes to specific chromosomes. Most of the esterase isozymes located were in the long arm of the chromosomes of the homoeology group 3; but we have found six located in the short arms, five of them in the chromosome 3AS and one in the 3DS. This location increases the number of esterase genes described, because no esterase genes had been described so far in short arms of chromosomes of the homoeology group 3. The genetic control is discussed and, according to our results, between 12 and 15 loci, organized in five “compound loci”, control the endosperm esterases in wheat. Also one “modifier” gene modifying the mobility of two esterase bands and present in all the cultivars studied is postulated.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00262570
    Standort Signatur Erwartet Verfügbarkeit
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  • 3
    Digitale Medien
    Digitale Medien
    Genetic mapping of isozyme loci in Secale cereale L. (1990)
    Springer
    Theoretical and applied genetics 80 (1990), S. 88-94 
    Details
    ISSN: 1432-2242
    Schlagwort(e): Secale cereale ; Rye ; Isozyme genes ; Genetic map ; Chromosomal assignment
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Summary The genetics and linkage relationships of several isozymatic and morphological markers have been investigated in different cultivars of rye (Secale cereale L.). The inheritance and the variability among cultivars of three new isozymatic zones are described: GOT2 and LAP, each of them under the control of a two-allele single locus, namely Got2 and Lap, respectively; and 6PGD1 controlled by two loci, 6Pgd1a and 6Pgd1b, which have alleles in common. Four linkage groups have been found: Acp2-Acp3, Got3-Mdh2-Lper4, Mdh1-6Pgd2-Pgi2, and Pgm-Eper2-[Eper1-Eper3]. The assignment of these four groups to the chromosomes 7R, 3R, 1R, and 4R is discussed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00224020
    Standort Signatur Erwartet Verfügbarkeit
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  • 4
    Digitale Medien
    Digitale Medien
    Ecogeographical distribution and differential adaptedness of multilocus allelic associations in Spanish Avena sativa L. (1994)
    Springer
    Theoretical and applied genetics 88 (1994), S. 56-64 
    Details
    ISSN: 1432-2242
    Schlagwort(e): Avena sativa ; Genetic variability ; Multivariate analysis ; Multilocus associations ; Genetic resources
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract We determined the nine-locus isozyme genotype of 267 landrace accessions of Avena sativa from 31 provinces of Spain. Our results establish that level of genetic variability is usually high both within and among accessions of this heavily self-fertilizing hexaploid grass and that multilocus genetic structure differs in various ecogeographical regions of Spain. We concluded that selection favoring different multilocus genotypes in different environments was the main integrating force that shaped the internal genetic structure of local populations as well as the overall adaptive landscape of A. sativa in Spain. Implications in genetic resource conservation and utilization are discussed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00222394
    Standort Signatur Erwartet Verfügbarkeit
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  • 5
    Digitale Medien
    Digitale Medien
    Genetic variability of leaf esterases in Triticum aestivum L. 2n=6x=42 (1990)
    Springer
    Theoretical and applied genetics 79 (1990), S. 673-678 
    Details
    ISSN: 1432-2242
    Schlagwort(e): Leaf esterases ; Genetic variability ; Triticumaestivum
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Summary Starch gel electrophoresis with two different buffer systems and several substrates and inhibitors have been used to study the electrophoretic variability of esterases in leaves of cultivars of Triticum aestivum. Each one of the buffer systems showed different levels of variability, according to the electrophoretic patterns. At the same time green and etiolated leaves showed different patterns in each buffer system. The variability was dependent upon the developmental stage of the leaves. According to the results from chromosomal location, the genes controlling esterases in green leaves were located in homoeology group 3, while the genes controlling esterases in etiolated leaves were in homoeology group 6. But both esterase isozymes showed a similar electrophoretic migration and a similar reponse to substrates and inhibitors. The possible origin of both sets of genes due to an interchromosomal duplication is discussed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00226882
    Standort Signatur Erwartet Verfügbarkeit
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