Assessment of drought resistance in pearl millet [Pennisetum americanum (L.) Leeke]. I. Factors affecting yields under stress

    Bidinger, F R and Mahalakshmi, V and Rao, G D P (1987) Assessment of drought resistance in pearl millet [Pennisetum americanum (L.) Leeke]. I. Factors affecting yields under stress. Australian Journal of Agricultural Research, 38 (1). pp. 37-48.

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    Abstract

    Yield trials of advanced lines of pearl millet were grown under midseason (panicle initiation to flowering) and terminal (flowering to maturity) drought stresses in the dry seasons of 1981, 1982, and 1983 in Patancheru, India. Grain yield and its components were severely reduced by the terminal stress, but were little affected by the midseason drought, as there was compensation by later tillers for yield lost on the earlier shoots. Grain yields for irrigated control, midseason stress and terminal stress treatments were resp., 0.230, 0.218 and 0.103 kg/m2 in 1981, 0.246, 0.257 and 0.109 kg/m2 in 1982, and 0.298, 0.249 and 0.097 kg/m2 in 1983. The major factor determining grain yield of a genotype in both stress treatments was its time to flowering. Hence yield to yield component relationships under stress were a result of yield component to phenology relationships. Yield potential (measured in an irrigated treatment in the same field) was generally positively related to yield under stress, but accounted for a much smaller fraction of yield variation than time to flowering. These two factors together accounted for more than 50% of the total variation in grain yield under stress, suggesting that genotype response (drought resistance/susceptibility) was a secondary rather than a primary factor in differences in yield under stress among the genotypes tested.

    Item Type: Article
    Divisions: UNSPECIFIED
    CRP: UNSPECIFIED
    Subjects: Mandate crops > Millets
    Depositing User: Library ICRISAT
    Date Deposited: 15 Sep 2011 05:33
    Last Modified: 15 Sep 2011 05:33
    URI: http://oar.icrisat.org/id/eprint/1431
    Official URL: http://dx.doi.org/10.1071/AR9870049
    Projects: UNSPECIFIED
    Funders: UNSPECIFIED
    Acknowledgement: UNSPECIFIED
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