A statistical assessment of genotypic sensitivity of groundnut (Arachis hypogae L.) to drought in line source sprinkler experiments

    Singh, M and Rao, R C N and Williams, J H (1991) A statistical assessment of genotypic sensitivity of groundnut (Arachis hypogae L.) to drought in line source sprinkler experiments. Euphytica, 57 (1). pp. 19-25. ISSN 1573-5060

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    Abstract

    Comparison of genotypes in line source based drought screening has a number of statistical problems because of the systematic nature of irrigation treatments. A method of applying the joint regression approach has been developed and applied to evaluate sensitivity of 22 groundnut genotypes grown under 11 patterns of drought which were simulated in the field using a line-source sprinkler technique. The experimental errors in neighbouring environments are assumed correlated to account for the systematic nature of the environments. The estimation of parameters of the model and comparison of genotypes for their sensitivity to drought are presented for the pod yield. Stability in performance across the line-source environment was estimated for 22 genotypes. None of the genotypes tested was insensitive to drought across all patterns. Genotypes with stability and high mean yield could be identified in early and mid-season drought patterns but not in other patterns where genotypic sensitivity was strongly correlated with yield performance.

    Item Type: Article
    Divisions: UNSPECIFIED
    CRP: UNSPECIFIED
    Uncontrolled Keywords: Arachis hypogae, peanut, groundnut, drought sensitivity, line-source sprinkler, correlated errors
    Subjects: Mandate crops > Groundnut
    Depositing User: Mr Siva Shankar
    Date Deposited: 12 Dec 2012 10:05
    Last Modified: 12 Dec 2012 10:05
    URI: http://oar.icrisat.org/id/eprint/6300
    Official URL: http://dx.doi.org/10.1007/BF00040474
    Projects: UNSPECIFIED
    Funders: UNSPECIFIED
    Acknowledgement: This paper is submitted as ICRISAT Journal Article No. JA-1166. We are thankful to the referees of ICRISAT Editorial Committee and Euphytica for several helpful suggestions.
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