Evaluation of the Ugandan sorghum accessions for grain mold and anthracnose resistance

Prom, L.K and Isakeit, T. and Perumal, R. and et al, . (2013) Evaluation of the Ugandan sorghum accessions for grain mold and anthracnose resistance. Crop Protection, 30 (5). pp. 566-571.

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Abstract

Sorghum accessions from Uganda were evaluated for grain mold and anthracnose resistance during the 2005 and 2006 growing seasons at the Texas A&M University Research Farm, near College Station, TX. Accession PI534117 and SC719-11E exhibited the lowest grain mold severities of 2.4, whereas, accessions PI534117, PI534144, PI576337, PI297199, PI533833, and PI297210, with SC748-5 were highly resistant to anthracnose in both years. Accessions PI534117, PI297134, PI297156 exhibited low grain mold severities in 2006. Significant negative correlation was recorded between grain mold and percent germination and high temperature in both years. In 2006, daily precipitation recorded significant positive correlation with grain mold. The seed mycoflora was analyzed across sorghum lines and treatments. In 2005, Curvularia lunata and Fusarium thapsinum were the most frequently recovered fungal species with 31 and 21% incidence, respectively, followed by Alternaria spp. (19%) and F. semitectum (13%). In 2006, predominant colonizers were F. thapsinum (58%), followed by Alternaria and F. semitectum with 15 and 10, percent respectively, while C. lunata had a 6% incidence. In this study, PI534117 holds promise for multiple disease resistance, as it had the lowest disease severity of grain mold and was highly resistant to anthracnose in both years. It also has a high germination rate, a high seed weight, and its short stature is more advantageous for the new A-line conversion program.

Item Type: Article
Uncontrolled Keywords: Sorghum bicolor; Colletotrichum sublineolum; Fusarium species; Exotic sorghum
Author Affiliation: USDA-ARS, Southern Plains Agriculture Research Center, 2765 F & B Road, College Station, TX 77845, USA.
Subjects: Plant Protection
Divisions: Sorghum
Depositing User: Mr Siva Shankar
Date Deposited: 27 Jun 2013 03:01
Last Modified: 27 Jun 2013 03:01
Official URL: http://dx.doi.org/10.1016/j.cropro.2010.12.025
URI: http://eprints.icrisat.ac.in/id/eprint/10793

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