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  • 1
    Electronic Resource
    Electronic Resource
    Distribution of ent-kaurene synthetase in Helianthus annuus and Marah macrocarpus
    Amsterdam : Elsevier
    Phytochemistry 24 (1985), S. 461-464 
    Details
    ISSN: 0031-9422
    Keywords: Compositae ; Cucurbitaceae ; Helianthus annuus ; Marah macrocarpus ; distribution in tissues. ; ent-kaurene synthetase ; natural inhibitors
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/S0031-9422(00)80747-5
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Genetic distance as a predictor of heterosis and hybrid performance within and between heterotic groups in sunflower (2000)
    Springer
    Theoretical and applied genetics 100 (2000), S. 889-894 
    Details
    ISSN: 1432-2242
    Keywords: Key words Heterosis ; Genetic distance ; Sunflower ; Helianthus annuus
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract  Heterosis is significant for seed yield and is one of the driving forces behind the hybrid seed industry in cultivated sunflower (Helianthus annuus L). Heterotic groups in sunflower, if any other than the female and male inbred-line groups exist, have not been well studied or described. The primary aims of this study were to assess the utility and validity of a series of proposed heterotic groups and estimate correlations between genetic distance, heterosis, and hybrid performance for seed yield in sunflower. Fortytwo female by male heterotic group (A × R) and 81 female by female heterotic group (A × B) single-cross hybrids were grown in Corvallis, Ore., and Casselton, N.D., in 1996 and 1997. Heterosis was significant for seed yield and plant height but not for seed oil concentration and days to flowering. Genetic distances were significantly correlated with hybrid seed yield when estimated from AFLP fingerprints (G D) (r = 0.63 for A × R and 0.79 for A × B hybrids), but not from coancestries (G C) (r = -0.02 for A × R and 0.54 for A × B hybrids). G D (R 2 = 0.4) was a poor predictor of hybrid seed yield. The proposed heterotic groups in sunflower seem to have utility, but do not seem to be as strongly differentiated as those in corn (Zea mays L.). The highest-yielding hybrids were from the BC× RB heterotic pattern; however, several BC× BC hybrids (within-group hybrids) were among the top-yielding hybrids. The outstanding performance of certain BC× BC hybrids casts some doubt on the validity of the BC group. Substantial genetic diversity seems to be present within and between heterotic groups in sunflower.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001220051366
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  • 3
    Electronic Resource
    Electronic Resource
    Diversity among sources of cytoplasmic male sterility in sunflower (Helianthus annuus L.) (1991)
    Springer
    Euphytica 55 (1991), S. 125-129 
    Details
    ISSN: 1573-5060
    Keywords: sunflower ; Helianthus annuus ; hybrid breeding ; cytoplasmic male sterility ; fertility restoration ; interspecific hybridization
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Ten cytoplasmic male sterile (CMS) sunflower (Helianthus annuus L.) lines were crossed with nine maintainer or male fertility restorer lines in a diallel crossing scheme. Based on fertility restoration of the F1 generation, CMS lines were divided into four groups. At least two new sources of CMS, CMS PET2 and CMS GIG1, were found to be potentially useful for commercial production of hybrids. Environment had an influence on fertility restoration of one CMS line, CMS MAX1. Effective restoration of male fertility for CMS RIG1, CMS ANN2, and CMS ANN3 was not found.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00025224
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    Paper (German National Licenses)
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