Historical Review of Sugarcane Streak Mosaic Virus that Has Recently Emerged in Africa

Jean Daugrois, Philippe Roumagnac, Charlotte Julian, Denis Filloux, Lilik Putra, Dimitre Mollov, Philippe Rott

Phytopathology; 2024 Apr; 114(4):668-680. doi: 10.1094/PHYTO-08-23-0291-RVW. 

Abstract

Sugarcane streak mosaic virus (SCSMV), now assigned to the genus Poacevirus of the family Potyviridae, was reported for the first time in 1932 in Louisiana and was believed to be strain F of sugarcane mosaic virus (SCMV) for more than six decades. SCMV-F was renamed SCSMV in 1998 after partial sequencing of its genome and phylogenetic investigations. Following the development of specific molecular diagnostic methods in the 2000s, SCSMV was recurrently found in sugarcane exhibiting streak mosaic symptoms in numerous Asian countries but not in the Western hemisphere or in Africa. In this review, we give an overview of the current knowledge on this disease and the progression in research on SCSMV. This includes symptoms, geographical distribution and incidence, diagnosis and genetic diversity of the virus, epidemiology, and control. Finally, we highlight future challenges, as sugarcane streak mosaic has recently been found in Africa, where this disease represents a new threat to sugarcane production.

See https://pubmed.ncbi.nlm.nih.gov/37966994/

Figure 4: Phylogenetic tree of sugarcane streak mosaic virus (SCSMV) constructed with the amino acid sequence (3,130 to 3,133 aa) of the genome-coding region of 33 virus isolates from GenBank. Evolutionary analyses were conducted using the neighbor-joining method (JTT + G model) in MEGA11 (Tamura et al. 2021). Bootstrap values (1,000 replicates) are given next to the branches. The scale bar of evolutionary distances is in the units of the number of amino acid substitutions per site. Each isolate of SCSMV is indicated by its country code followed by its GenBank number. CHN = China, CIV-FE = Côte d'Ivoire-Ferkessédougou, CIV-ZU = Côte d'Ivoire-Zuénoula, IND = India, IR = Iran, MYA = Myanmar, PAK = Pakistan, THA = Thailand, and USA-LA = United States of America-Louisiana.