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Early and Late Leaf Spot Resistance and Agronomic Performance of Nineteen Interspecific Derived Peanut Lines¹

Authors: M. Ouedraogo , O. D. Smith , C. E. Simpson , D. H. Smith

  • Early and Late Leaf Spot Resistance and Agronomic Performance of Nineteen Interspecific Derived Peanut Lines¹

    ARTICLES

    Early and Late Leaf Spot Resistance and Agronomic Performance of Nineteen Interspecific Derived Peanut Lines¹

    Authors: , , ,

Abstract

Nineteen selected interspecific peanut lines with resistance to leaf spot Cercospora arachidicola Hori and/or Cercosporidium personatum (Berk, and Curt.) Deighton were field tested 3 yr for disease reaction and productivity with and without foliar fungicide protection. Measurements included severity ratings of leaf spot every 2 wk based on the Florida leaf spot disease rating scale, and pod yield. Area under disease progress curves (AUDPC) and pod yield losses were calculated. Differences among the interspecific lines in AUDPC values were significant, and one line had values equal to or lower than that of Southern Runner. One-half of the lines were equal in yield (P=0.01) to Southern Runner. Yields among lines averaged 1 to 50% higher with, as compared to without, chlorothalonil application. Yield losses of individual entries varied significantly from 1 yr to another and incongruous with the AUDPC pattern. Correlations between the AUDPC and yield loss were significant (P=0.01) for the 1989 and 1990, but not for the 1988 data. Results of the study indicate that resistance to both C. arachidicola and personatum were incorporated from the wild species parents into productive, runner-type breeding lines, and that the resistance to personatum was equal to or better than that of Southern Runner. Additional effort will be required to transfer levels of leaf spot resistance observed in the wild species parents into successful cultivars.

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Keywords: Arachis hypogaea, Groundnut, Cercospora arachidicola, Cercosporidium personatum, Phaeoisariopsis personata, disease progress curve, Introgression, interspecific lines

How to Cite:

Ouedraogo, M. & Smith, O. & Simpson, C. & Smith, D., (1994) “Early and Late Leaf Spot Resistance and Agronomic Performance of Nineteen Interspecific Derived Peanut Lines¹”, Peanut Science 21(2), p.99-104. doi: https://doi.org/10.3146/i0095-3679-21-2-7

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Published on
01 Jul 1994
Peer Reviewed

Author Notes

1Contribution from the Texas Agric. Exp. Stn., Texas A&M Univ., College Station, TX, TA No.31398. This publication was supported in part by the Peanut CRSP, U.S. Agency for International Development, under grant Number DAN-4048-G-0041-00. Recommendations do not represent an official position or policy by USAID.