Author
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Sood, Sushma |
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Comstock, Jack |
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McCord, Per |
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Submitted to: University of Florida Cooperative Extension Service Institute of Food and Agriculture Science
Publication Type: Abstract Only Publication Acceptance Date: 5/1/2017 Publication Date: N/A Citation: N/A Interpretive Summary: N/A Technical Abstract: Orange rust of sugarcane (Saccharum spp. hybrids), caused by Puccinia kuehnii (W. Krüger) E.J. Butler, appeared in the Western Hemisphere ten years ago. Orange rust substantially reduces yields in susceptible sugarcane genotypes. Majority of the commercial cultivars were susceptible at the time of orange rust incursion and most of them are still susceptible. Commercial production of some highly susceptible cultivars such as CP80-1743 and CP89-2143 was eliminated or reduced. It takes more than ten years to develop a disease resistant high yielding commercial cultivar. Few orange rust resistant cultivars have been released for the commercial production. Many parental clones in Canal Point (CP) breeding program were susceptible at that time. CP breeding program discarded most of the highly susceptible parents. Also, many promising high yielding varieties in the Canal Point breeding program were discarded due to their susceptibility to orange rust. From 2007-2010, more than 25% of clones were discarded in every selection stage of the CP breeding program and resulted in reduced overall productivity of cultivar development. Intensified orange rust screening in all stages of selection process and restricted advancement of susceptible clones has increased number of resistant clones in all stages and especially in later stages of the cultivar development program. |
