Utilizing Arachis cardenasii as a source of Cercospora leafspot resistance for peanut improvement

Stalker, H.T. (1984) Utilizing Arachis cardenasii as a source of Cercospora leafspot resistance for peanut improvement. Euphytica, 33 (2). pp. 529-538.

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Abstract

Advanced generation 40-chromosome hybrids between A. hypogaea (2n=4x=40) and a wild diploid species. A. cardenasii were evaluated for early leafspot, Cercospora arachidicola resistance and agronomic potential. The objective of this investigation was to determine if early leafspot resistance derived from a wild species could be incorporated into the A. hypogaea genome. Interspecific hybrid selections were made and then compared in the field and greenhouse to susceptible cultivars and to A. hypogaea lines which are reported to be resistant to early leafspot. Significantly higher levels of resistance were found in five hybrid selections than in cultivated lines based on numbers of lesions per leaf. In a greenhouse study, several hybrid selections also had greatly reduced sporulation from lesions as compared to A. hypogaea. Several mechanisms of resistance are believed to be present. Although hybrid selections had small seeds and low yields as compared to A. hypogaea, a new and valuable source of early leafspot resistance derived from the species A. cardenasii is present.

Item Type:	Article
Additional Information:	SNNigam Collection
Uncontrolled Keywords:	Arachis hypogae, Groundnut, Arachis cardenasii, Interspecific hybrids, Cercospora arachidicola, Cercospora leafspot
Author Affiliation:	Dept. of Crop Science, N. C. State University, North Carolina, USA
Subjects:	Plant Protection Crop Improvement
Divisions:	Groundnut
Depositing User:	Mr Arbind Seth
Date Deposited:	26 Apr 2013 05:05
Last Modified:	26 Apr 2013 05:05
Official URL:	http://dx.doi.org/10.1007/BF00021154
URI:	http://eprints.icrisat.ac.in/id/eprint/10391

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