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    • Journal of Range Management, Volume 49 (1996)
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    Potential of new tetraploid germplasm in Russian wildrye

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    Author
    Asay, K. H.
    Johnson, D. A.
    Jensen, K. B.
    Sarraj, W. M.
    Clark, D. H.
    Issue Date
    1996-09-01
    Keywords
    crop quality
    Psathyrostachys juncea
    tetraploidy
    yields
    seeds
    seedlings
    water-use efficiency
    vigor
    crop yield
    forage
    
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    Citation
    Asay, K. H., Johnson, D. A., Jensen, K. B., Sarraj, W. M., & Clark, D. H. (1996). Potential of new tetraploid germplasm in Russian wildrye. Journal of Range Management, 49(5), 439-442.
    Publisher
    Society for Range Management
    Journal
    Journal of Range Management
    URI
    http://hdl.handle.net/10150/644302
    DOI
    10.2307/4002926
    Additional Links
    https://rangelands.org/
    Abstract
    Induced and natural tetraploids have been proposed as promising sources of germplasm in breeding programs to improve Russian wildrye [Psathyrostachys juncea (Fisch.) Nevski]. Studies were conducted under semiarid conditions to evaluate the potential of tetraploid (2n=4x=28) Russian wildrye germplasm recently obtained from Kazakhstan. The teraploids had significantly heavier seeds, greater seedling vigor, and they were significantly taller, and had longer and wider leaves than standard diploid (2n=2x=14) cultivars. Carbon isotope discrimination, which has been negatively correlated with water-use efficiency in cool-season grasses, was significantly lower in the tetraploid accessions than the diploid cultivars. Dry matter and seed yield of these unselected tetraploid accessions were superior to the diploid cultivar Vinall and equivalent to more recently developed diploid cultivars, Bozoisky-Select and Syn-A. In general, relative phenological development and forage quality of the tetraploid populations did not differ significantly from the diploid cultivars; however, water content, which has been associated with greater succulence, was significantly higher in the tetraploid accessions. Significant variation was found among entries within ploidy levels for most characters indicating that genetic variability is available for additional improvement through selection. Results indicate that these tetraploid accessions can be used in the development of promising breeding populations and support earlier conclusions that tetraploid germplasm should receive emphasis in future Russian wildrye breeding programs.
    Type
    text
    Article
    Language
    en
    ISSN
    0022-409X
    ae974a485f413a2113503eed53cd6c53
    10.2307/4002926
    Scopus Count
    Collections
    Journal of Range Management, Volume 49, Number 5 (September 1996)

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