Lin Yinfu, Ali Niyaz, Hajimorad M R, Zhang Lijuan, Qi Xiaohang, Zhou Longwu, Wen Ronghui, Chen Baoshan
State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bio-Resources and Guangxi Key Laboratory for Sugarcane Biology, College of Life Science and Technology, Guangxi University, Nanning 530004, China.
College of Agriculture, Guangxi University, Nanning 530004, China.
Plant Dis. 2021 Nov;105(11):3531-3537. doi: 10.1094/PDIS-10-20-2307-RE. Epub 2021 Nov 18.
A novel virus of the genus , family , has been reported in sugarcane germplasm collections in Florida, Guadeloupe, and Réunion, and was named sugarcane striate virus (SStrV). Although the full-length sequence of an SStrV isolate from China was obtained in 2015, the incidence, geographical distribution, and genetic diversity of this virus remained unclear. A single leaf sample from 2,368 sugarcane plants from main sugarcane-producing regions of China and germplasm collections were tested for SStrV by PCR. Average virus incidence was 25.1% for field-collected samples, and SStrV was detected in most species and two sugarcane-related species, with the highest incidence in (44.1%) followed by spp. local varieties (33.3%) grown for chewing cane for a long time. The virus incidence was much lower (6.8%) in modern commercial cultivars ( spp. hybrids). Phylogenetic trees based on full-length genomes of 157 SStrV isolates revealed that Chinese isolates comprised strains A and B, but not C and D, that were reported in Florida, U.S.A. SStrV strain A was the most prominent (98.7%) and widespread strain in China and was further divided into eight subgroups. Almost half (45.6%) of the SStrV-positive samples from and spp. local varieties were coinfected with sugarcane mosaic disease viruses or sugarcane yellow leaf virus. Interestingly, most of the plants infected by strain A of SStrV were asymptomatic. SStrV appears to be widespread in China, and its influence on chewing cane deserves further investigation.
在佛罗里达州、瓜德罗普岛和留尼汪岛的甘蔗种质资源库中报道了一种属于 属、 科的新型病毒，并将其命名为甘蔗条纹病毒（SStrV）。尽管2015年已获得来自中国的一株SStrV分离株的全长序列，但该病毒的发病率、地理分布和遗传多样性仍不清楚。通过PCR对来自中国主要甘蔗产区的2368株甘蔗植株的单叶样本以及种质资源库进行了SStrV检测。田间采集样本的平均病毒发病率为25.1%，在大多数 品种和两个甘蔗近缘物种中检测到了SStrV，其中 发病率最高（44.1%），其次是长期作为咀嚼用甘蔗种植的 spp.地方品种（33.3%）。现代商业品种（ spp.杂交种）中的病毒发病率要低得多（6.8%）。基于157株SStrV分离株全长基因组构建的系统发育树显示，中国分离株包括A和B菌株，但不包括在美国佛罗里达州报道的C和D菌株。SStrV A菌株是中国最主要（98.7%）且分布广泛的菌株，并进一步分为八个亚组。来自 和 spp.地方品种的SStrV阳性样本中，近一半（45.6%）同时感染了甘蔗花叶病病毒或甘蔗黄叶病毒。有趣的是，大多数感染SStrV A菌株的植株无症状。SStrV似乎在中国广泛分布，其对咀嚼用甘蔗的影响值得进一步研究。
