Combination of Early Maturity and Leaf Spot Tolerance Within an Advanced Georgia Peanut Breeding Line

Branch, W.D. and Culbreath, A.K. (1995) Combination of Early Maturity and Leaf Spot Tolerance Within an Advanced Georgia Peanut Breeding Line. Peanut Science, 22 (2). pp. 106-108.

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Abstract

In the past, genetic resistance to both early and late leaf spots [Cercospora arachidicola Hori and Cercosporidiumpersonatum (Berk. & Curt.) Deighton] has been found to be negatively or inversely correlated with early maturity in the cultivated peanut (Arachis hypogaea L.). For example, the late leaf spot resistant cultivar Southern Runner is approximately 2 wk later in maturity than the susceptible Florunner cultivar. Recently, an advanced runner-type breeding line (GA T-2844) has been developed by the Georgia peanut breeding program which combines early maturity and leaf spot tolerance. For the past 3 yr (1991–1993), GA T-2844 has been evaluated in replicated field tests without fungicides. Results show that GA T-2844 has on the average >30% yield advantage and a 30-d earlier maturity than Southern Runner. Leaf spot ratings also showed GA T-2844 to be intermediate between Southern Runner and Florunner. Such a combination of early maturity and leaf spot tolerance could significantly enhance U.S. peanut production by providing an environmentally safer and efficient alternative to costly pesticides not previously available among runner-type cultivars.

Item Type: Article
Additional Information: SNNigam Collection
Uncontrolled Keywords: Arachis hypogaea L, groundnut, disease resistance, Mycosphaerella arachidis Deighton, Mycosphaerella berkeleyi Jenk
Author Affiliation: Prof. and Assoc. Prof., Dept. of Crop and Soil Sciences and Plant Pathology, respectively, Coastal Plain Expt. Stn., Tifton, GA 31793–0748
Subjects: Crop Improvement
Divisions: Groundnut
Depositing User: Mr Balakrishna Garadasu
Date Deposited: 14 May 2013 05:34
Last Modified: 14 May 2013 05:34
Official URL: http://dx.doi.org/10.3146/i0095-3679-22-2-6
URI: http://eprints.icrisat.ac.in/id/eprint/10497

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