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    • Journal of Range Management, Volume 44 (1991)
    • Journal of Range Management, Volume 44, Number 3 (May 1991)
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    Selecting Atriplex canescens for greater tolerance to competition

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    Author
    Ueckert, D. N.
    Petersen, J. L.
    Issue Date
    1991-05-01
    Keywords
    phenotypic selection
    phenotypic stability
    genetic regulation
    phenotype
    crop establishment
    plant cuttings
    Bouteloua curtipendula
    competitive ability
    Atriplex canescens
    environmental factors
    plant competition
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    Citation
    Ueckert, D. N., & Petersen, J. L. (1991). Selecting Atriplex canescens for greater tolerance to competition. Journal of Range Management, 44(3), 220-227.
    Publisher
    Society for Range Management
    Journal
    Journal of Range Management
    URI
    http://hdl.handle.net/10150/644781
    DOI
    10.2307/4002945
    Additional Links
    https://rangelands.org/
    Abstract
    Success in establishing fourwing saltbush [Atriplex canescens (Pursh) Nutt.] is often limited by competition from associated vegetation. Fourwing saltbush is reported to have abundant natural genetic variation, hence selection for plant vigor or competitiveness may be an effective tool for cultivar improvement. We observed distinctive within-accession variation in the apparent ability of fourwing saltbush seedlings to tolerate competition from sideoats grama [Bouteloua curtipendula (Michx.) Torr.] in a 1982 field planting. Superior and inferior parental saltbush phenotypes in the field planting were cloned in 1984 by rooting stem cuttings, and the cloned propagules were transplanted into plots with or without competition to test the hypothesis that the competitiveness trait was genetically controlled. Survival and canopy development of superior and inferior clones planted at the same time in competition regimens were similar, suggesting that the parental phenotypes were not genetically different in their ability to tolerate competition. Differences observed in the parental phenotypes may have been environmentally induced, or genetic differences in the clonal material may have been masked by using rooted cuttings rather than seedlings, by excessive competitive pressure in the competition regimens utilized, or both. Clones from the 2 parental phenotypes performed similarly when transplanted into competition-free regimens in November when growing conditions were favorable, but canopy development of clones from superior parental phenotypes exceeded that of those from inferior parental phenotypes when transplanted into competition-free regimens in April when growing conditions were poor.
    Type
    text
    Article
    Language
    en
    ISSN
    0022-409X
    ae974a485f413a2113503eed53cd6c53
    10.2307/4002945
    Scopus Count
    Collections
    Journal of Range Management, Volume 44, Number 3 (May 1991)

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