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    • Journal of Range Management, Volume 36 (1983)
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    Genetic Variability for Characters Affecting Stand Establishment in Crested Wheatgrass

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    Author
    Asay, K. H.
    Johnson, D. A.
    Issue Date
    1983-11-01
    
    Metadata
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    Citation
    Asay, K. H., & Johnson, D. A. (1983). Genetic variability for characters affecting stand establishment in crested wheatgrass. Journal of Range Management, 36(6), 703-706.
    Publisher
    Society for Range Management
    Journal
    Journal of Range Management
    URI
    http://hdl.handle.net/10150/645883
    DOI
    10.2307/3898189
    Additional Links
    https://rangelands.org/
    Abstract
    Experiments were conducted in the laboratory (growth chamber) and field to determine the: (1) magnitude of genetic differences in crested wheatgrass [Agropyron cristatum (L.) Gaertn. and A. desertorum (Fisch. ex Link) Schult.] for characteristics related to seedling establishment on semiarid range and (2) effectiveness of laboratory procedures to estimate relative performance of breeding lines in the field. Significant differences were found among 175 crested wheatgrass progeny lines for seedling emergence, seedling height, seedling dry weight, and fall stand in the analyses of data combined over 2 field locations. The soil at both study sites was a Xerallic Calciorthids. The genetic variance among progenies comprised over 50% of the total phenotypic variance for most traits in the combined analyses of variance. Seedling emergence in the spring was positively related to fall stands (r = 0.54** to 0.61**). In growth chamber experiments involving 168 progeny lines, significant genetic variation was detected in seedling recovery after exposure to drought stress in 3 of 4 experiments. The genetic variance comprised over 50% of the total phenotypic variance in 5 of 6 instances in the combined analyses of the field data and in 3 of the 4 laboratory experiments. In general, laboratory determinations of seedling emergence under drought stress and seedling recovery after drought were not significantly related to seedling establishment in the field. A relatively close correlation between seed weight and all plant responses measured in the field (r = 0.46** to 0.57** in the pooled data) suggests that preliminary screening on the basis of seed weight appears promising.
    Type
    text
    Article
    Language
    en
    ISSN
    0022-409X
    ae974a485f413a2113503eed53cd6c53
    10.2307/3898189
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    Journal of Range Management, Volume 36, Number 6 (November 1983)

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