Crop losses in Brazilian cassava varieties induced by the Cassava common mosaic virus

Authors

  • Marcela Tonini Venturini Federal University of Bahia Reconcavo
  • Taylane da Silva Araújo Federal University of Bahia Reconcavo
  • Emanuel Felipe Medeiros Abreu Embrapa Cassava and Tropical Fruits
  • Eduardo Chumbinho de Andrade Embrapa Cassava and Tropical Fruits
  • Vanderlei da Silva Santos Embrapa Cassava and Tropical Fruits
  • Marcos Roberto da Silva Federal University of Bahia Reconcavo
  • Eder Jorge de Oliveira Embrapa Cassava and Tropical Fruits

DOI:

https://doi.org/10.1590/0103-9016-2015-0374

Abstract

Despite the widespread distribution of the Cassava common mosaic virus (CsCMV) in Brazil, little is known about the losses it causes in yield. The effect of CsCMV on different varieties was evaluated by reference to several agronomic traits. Four field trials were established in 2012/2013 and 2013/2014 using six varieties of cassava. Following mechanical inoculation with CsCMV, the presence of the virus was confirmed using the ELISA assay. The evaluated traits were plant height (PH), dry matter content (DMC), harvest index (HI), aerial part yield (APY), root yield (RoY), and starch yield (StY) in both inoculated and non-inoculated plants. Overall, the presence of the virus contributed little to the reduction in PH, HI, and DMC across the varieties, with PH being significantly reduced by 9.2 and 7.0 % in the BGM0212 and BRS Kiriris varieties, respectively. In contrast, APY, RoY, and StY were reduced by 30.2, 29.3, and 30.0 %, in the virus-infected plants respectively. While the BRS Kiriris and BRS Jari varieties suffered the highest reductions overall and were considered highly susceptible to CsCMV, none of the traits suffered reductions in the inoculated BRS Formosa plants. Although RoY and StY were reduced in inoculated plants of BRS Tapioqueira, crop yield for this variety was the highest. Thus, BRS Formosa and BRS Tapioqueira exhibited tolerance against CsCMV, which warrants further investigation.

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Published

2016-12-01

Issue

Section

Plant Pathology

How to Cite

Crop losses in Brazilian cassava varieties induced by the Cassava common mosaic virus . (2016). Scientia Agricola, 73(6), 520-524. https://doi.org/10.1590/0103-9016-2015-0374