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    • Journal of Range Management, Volume 46 (1993)
    • Journal of Range Management, Volume 46, Number 3 (May 1993)
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    Viewpoint: Selection for improved drought response in cool-season grasses

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    Author
    Johnson, D. A.
    Asay, K. H.
    Issue Date
    1993-05-01
    Keywords
    genetic improvement
    breeding programs
    osmotic adjustment
    plant-water relations
    water uptake
    plant breeding
    heritability
    genetic variation
    seedling emergence
    drought tolerance
    water-use efficiency
    Poaceae
    grasses
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    Citation
    Johnson, D. A., & Asay, K. H. (1993). Viewpoint: Selection for improved drought response in cool-season grasses. Journal of Range Management, 46(3), 194-202.
    Publisher
    Society for Range Management
    Journal
    Journal of Range Management
    URI
    http://hdl.handle.net/10150/644659
    DOI
    10.2307/4002606
    Additional Links
    https://rangelands.org/
    Abstract
    Water limits the establishment, growth, and production of cool-season grasses on semiarid rangelands, and plant improvement programs for these areas must be capable of screening breeding lines for response to drought. Although many techniques to evaluate various morphological and physiological characteristics have been proposed, few have been used successfully in plant breeding programs. Consequently, a need exists to identify and develop rapid, reliable screening techniques that can assess integrated plant response to drought in large plant populations. Improved seedling emergence has been achieved in Russian wildrye [Psathyrostachys juncea (Fischer) Nevski] by selecting for emergence from a deep seeding depth and long coleoptiles. Water uptake by roots is critical, and screening for enhanced seedling root growth in cool-season grasses offers considerable promise. In spite of the important role that stomatal control has in regulating plant water loss, limited success has been achieved in incorporating desirable stomatal characteristics into improved grass cultivars. Although osmotic adjustment appears beneficial in some crop species, more research is needed before cool-season grasses should be selected based on osmotic adjustment. Selection for improved water-use efficiency in cool-season grasses based on carbon isotope discrimination is a promising approach. Successful incorporation of these various traits into improved cool-season grass cultivars necessitates close cooperation between breeders and physiologists.
    Type
    text
    Article
    Language
    en
    ISSN
    0022-409X
    ae974a485f413a2113503eed53cd6c53
    10.2307/4002606
    Scopus Count
    Collections
    Journal of Range Management, Volume 46, Number 3 (May 1993)

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