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Wyszukujesz frazę "Miedaner, T." wg kryterium: Autor

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    Wyświetlanie 1-4 z 4
    Tytuł:
    Epidemiological Effects of Combining Different Sources of Leaf-Rust Resistance in Winter Rye Synthetics
    Autorzy:
    Wilde, K.
    Miedaner, T.
    Geiger, H. H.
    Powiązania:
    https://bibliotekanauki.pl/articles/2198917.pdf
    Data publikacji:
    2003-12-21
    Wydawca:
    Instytut Hodowli i Aklimatyzacji Roślin
    Tematy:
    epidemiological effects
    leaf rust
    resistance
    rye synthetics
    Secale
    Opis:
    Economically important rye (Secale cereale L.) cultivars are highly susceptible to leaf rust caused by Puccinia recondita f.sp. secalis in Germany. Presently, only race-specific resistances are available, which are likely to lose their effect after prolonged application. To study possibilities of increasing the durability of resistance, a three-year field experiment was initiated in 2000. Seventeen differential lines, three susceptible standards, 30 segregating populations with one to four resistance sources and two full-sib families were grown at six locations under a high level of natural infection. All segregating populations were significantly more resistant than the susceptible standards. The resistance level, however, was under these conditions moderate only. The two full-sib families from Russia showed high resistance. Strong genotype × location interactions were observed indicating different race compositions of the local leaf rust populations.
    Źródło:
    Plant Breeding and Seed Science; 2003, 48; 99-103
    1429-3862
    2083-599X
    Pojawia się w:
    Plant Breeding and Seed Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Combining ability vs. population performance of genetic resources in rye
    Autorzy:
    Roux, S. R.
    Miedaner, T.
    Geiger, H. H.
    Knopf, E.
    Wilde, P.
    Wortmann, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/2198911.pdf
    Data publikacji:
    2003-12-21
    Wydawca:
    Instytut Hodowli i Aklimatyzacji Roślin
    Tematy:
    combining ability
    genetic resources
    hybrid rye breeding programme
    Opis:
    The comparison of the population per se performance and the combining ability of 19 genetic resources and 5 adapted populations demonstrated that genetic resources might be integrated in hybrid rye breeding programmes without previous selection for yield. However, highly heritable traits like straw length and susceptibility to lodging should be improved before.
    Źródło:
    Plant Breeding and Seed Science; 2003, 48; 45-47
    1429-3862
    2083-599X
    Pojawia się w:
    Plant Breeding and Seed Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Genetics of deoxynivalenol (DON) contamination caused by Fusarium head blight in hybrid rye.
    Autorzy:
    Miedaner, T.
    Wortmann, H.
    Geiger, H. H.
    Powiązania:
    https://bibliotekanauki.pl/articles/2198905.pdf
    Data publikacji:
    2003-12-21
    Wydawca:
    Instytut Hodowli i Aklimatyzacji Roślin
    Tematy:
    Fusarium culmorum
    hybrid breeding
    mycotoxins
    population parameters
    Secale cereale
    Opis:
    Head blight caused by Fusarium culmorum or F. graminearum affects all cereals including winter rye (Secale cereale L.). Besides yield and quality losses, grain is contaminated with the mycotoxin deoxynivalenol (DON) that is harmful to animals and humans. We analysed 76 self-fertile S2 lines and their corresponding testcrosses for head blight resistance and DON concentration in the grain by inoculating them with an aggressive isolate of F. culmorum at two locations in Southwestern Germany in 2000. Disease severity at both locations was low with mean ratings from 2.7 to 3.4 on a 1-9 scale (1=healthy), but still DON occurred in considerable amounts (11.4 - 15.0 mg kg-1). Genotypic variance was significant (P=0.01) in all instances, genotype-location interaction and error variances were more important for DON concentration resulting in a lower heritability of this trait. No association between S2 lines and their testcrosses was found for head blight rating or DON concentration (r = 0.33 and 0.19, respectively). The coefficient of correlation between head blight rating and DON concentration was low for the S2 lines and medium for the testcrosses (r=0.24 and 0.60, P=0.05 and P=0.01, resp.). The hybrid rye breeder should select predominantly on testcross performance. Selection for low head blight ratings should result in lower DON concentrations in the grain also. In later generations, DON should be analysed additionally to exploit the maximum selection gain possible.
    Źródło:
    Plant Breeding and Seed Science; 2003, 48; 69-78
    1429-3862
    2083-599X
    Pojawia się w:
    Plant Breeding and Seed Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Introgression Breeding – Effects and Side Effects of Marker-based Introduction of Two Non-adapted Qtl for Fusarium Head Blight Resistance Into Elite Wheat
    Autorzy:
    Miedaner, T.
    von der Ohe, C.
    Korzun, V.
    Ebmeyer, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/2199602.pdf
    Data publikacji:
    2011-06-21
    Wydawca:
    Instytut Hodowli i Aklimatyzacji Roślin
    Tematy:
    FHB
    QTL
    resistance
    wheat
    Opis:
    Fusarium head blight resistance (FHB) can be achieved by using improved adapted varieties as crossing partners or by a marker-assisted introgression of mapped QTL from non-adapted sources. In this long-term study Fhb1 on chromosome 3BS and Qfhs.ifa-5A located on chromosome 5A were introgressed into European elite spring and winter wheat to test effects on FHB resistance and side effects on agronomic performance and F. graminearum isolates and mixtures. The introgression of the QTL Fhb1 and Qfhs.ifa-5A from the Sumai 3-descendant CM82036 could be performed in the shortest possible way by marker-assisted backcrossing. They were both validated in European elite wheat background. Effects on FHB resistance were, on average, only about half of the effect in the original mapping populations. In the best phenotypically and marker-selected BC0 line of spring wheat FHB was reduced from 40 to 4.3% of disease symptoms by introgressing both QTL, in the best BC3 line of winter wheat the reduction was 28 and 37% for the moderately resistant and highly susceptible recurrent parent, respectively. Introgression of both QTL simultaneously did not result in significantly higher FHB resistance than introgression of only one of both QTL. Small significant negative effects on grain yield were detected in the Anthus but not in the Opus BC3F2:5 backcross population when both QTL were introgressed. Backcrossing with only Qfhs.ifa-5A did not reduce grain yield significantly. Differences in heading date, plant height and quality traits were in all cases small although often significant. Selection of lines with improved resistance level and similar high yield level like the recurrent parent was feasible. Stability of FHB resistance mediated by both QTL was stable across 22 Fusarium isolates from Europe and Canada and six binary mixtures. Competition effects between isolates in mixtures were obvious but could not be attributed to the resistance of the host. In conclusion, marker-based backcrossing is a feasible option for introgressing Fhb1 or Qfhs.ifa-5A QTL into the high-yielding, quality-oriented European wheat gene pool.
    Źródło:
    Plant Breeding and Seed Science; 2011, 63; 129-136
    1429-3862
    2083-599X
    Pojawia się w:
    Plant Breeding and Seed Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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