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ARS Home » Southeast Area » Mayaguez, Puerto Rico » Tropical Crops and Germplasm Research » Research » Publications at this Location » Publication #319816

Title: Response of the Andean diversity panel to root rot in a root rot nursery in Puerto Rico

item Porch, Timothy - Tim
item Hart, John
item ESTEVEZ DE JENSEN, C. - University Of Puerto Rico

Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: 7/6/2015
Publication Date: N/A
Citation: N/A

Interpretive Summary:

Technical Abstract: The Andean Diversity Panel (ADP) was evaluated under low-fertility and root rot conditions in two trials conducted in 2013 and 2015 in Isabela, Puerto Rico. About 246 ADP lines were evaluated in the root rot nursery with root rot and stem diseases caused predominantly by Fusarium solani, which causes root rot; Macrophomina phaseolina, which causes charcoal rot; Sclerotium rolfsii which causes southern blight; and Pythium spp. that cause damping off. The nursery is also not fertilized, thus poor soil fertility conditions were prevalent. A small number of lines were identified with moderate tolerance to these multiple stress conditions. Association mapping was conducted after genotyping the panel using genotyping-by-sequencing. Subsequent evaluation of ADP lines with resistance to specific soil borne pathogens can be used to identify specific disease resistance.