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Open AccessArticle

Screening for Sugarcane Brown Rust in the First Clonal Stage of the Canal Point Sugarcane Breeding Program

1
USDA-Agricultural Research Service, Sugarcane Field Station, Canal Point, FL 33438, USA
2
Florida Sugar Cane League, Inc., Clewiston, FL 33440, USA
*
Author to whom correspondence should be addressed.
Academic Editor: Diego Rubiales
Agronomy 2015, 5(3), 341-362; https://doi.org/10.3390/agronomy5030341
Received: 3 July 2015 / Revised: 28 July 2015 / Accepted: 28 July 2015 / Published: 31 July 2015
(This article belongs to the Special Issue Breeding for Disease Resistance)
Sugarcane (Saccharum spp.) brown rust (caused by Puccinia melanocephala Syd. & P. Syd.) was first reported in the United States in 1978 and is still one of the great challenges for sugarcane production. A better understanding of sugarcane genotypic variation in response to brown rust will help optimize breeding and selection strategies for disease resistance. Brown rust ratings were scaled from non-infection (0) to severe infection (4) with intervals of 0.5 and routinely recorded for genotypes in the first clonal selection stage of the Canal Point sugarcane breeding program in Florida. Data were collected from 14,272 and 12,661 genotypes and replicated check cultivars in 2012 and 2013, respectively. Mean rust rating, % infection, and severity in each family and progeny of female parent were determined, and their coefficients of variation (CV) within and among families (females) were estimated. Considerable variation exists in rust ratings among families or females. The families and female parents with high susceptibility or resistance to brown rust were identified and ranked. The findings of this study can help scientists to evaluate sugarcane crosses and parents for brown rust disease, to use desirable parents for crossing, and to improve genetic resistance to brown rust in breeding programs. View Full-Text
Keywords: sugarcane; Canal Point (CP) sugarcane breeding program; brown rust; screening for rust resistance sugarcane; Canal Point (CP) sugarcane breeding program; brown rust; screening for rust resistance
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Zhao, D.; Davidson, R.W.; Baltazar, M.; Comstock, J.C.; McCord, P.; Sood, S. Screening for Sugarcane Brown Rust in the First Clonal Stage of the Canal Point Sugarcane Breeding Program. Agronomy 2015, 5, 341-362.

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