Resistance to Sclerotinia blight and early leafspot in Chinese peanut germplasm

Porter, D.M. and Coffelt, T.A. and Wright, F.S. and Mozingo, R.W. (1992) Resistance to Sclerotinia blight and early leafspot in Chinese peanut germplasm. Peanut Science , 19 (1). pp. 41-43.

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Abstract

S. minor, causal agent of Sclerotinia blight, and Cercospora arachidicola [Mycosphaerella arachidis], causal agent of early leafspot, are 2 of the most important pathogens of groundnut in Virginia and North Carolina, USA. A total of 22 Chinese groundnut germplasm lines were screened to identify resistance to these 2 pathogens and evaluated for agronomic characteristics including seed size, testa colour and pod yield. Germplasm lines with PI numbers 476824 and 476843 exhibited more resistance to S. minor than other Chinese plant introductions or the USA cultivars Florigiant and VA 81B. PI 476823 and PI 476837 were most resistant to M. arachidis. Resistance to 1 pathogen was often associated with high levels of susceptibility to the other pathogen. Resistance to S. minor was also associated with undesirable characteristics for large-seed Virginia-type groundnuts such as tan testa colour and small seed size

Item Type: Article
Additional Information: SNNigam collections
Uncontrolled Keywords: Peanut germplasm, Arachis hypogaea, disease resistance,testa color, spanish-type, groundnut
Author Affiliation: USDA, ARS, Virginia Polytechnic Institute and State University, Tidewater Agricultural Experiment Station, Suffolk, VA 23437, USA
Subjects: Plant Protection
Crop Improvement
Divisions: Groundnut
Depositing User: Mr T L Gautham
Date Deposited: 23 Sep 2013 05:45
Last Modified: 23 Sep 2013 05:45
Official URL: http://dx.doi.org/10.3146/i0095-3679-19-1-11
URI: http://eprints.icrisat.ac.in/id/eprint/11771

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