Abstract
The purpose of this study was to detect the status of Fiji disease virus (FDV) and leaf scald ( Xanthomonas albilineans ) in the newly introduced sugarcane germplasms from USA and Vietnam, and observe their agronomic performances in Guangxi sugarcane growing area, thus to provide references for screening healthy sugarcane germplasm. Following the quarantine procedure, 41 newly introduced sugarcane germplasm accessions were planted in isolated quarantine area for FDV and leaf scald detection. The PCR (RT-PCR) results showed the reaction to FDV and leaf scald were both negative and no quarantine disease occurred. Further, field experiments were conducted to observe their agronomic performance and resistance to commom diseases, like red rot, yellow spot, ring spot, pokkah boeng, mosaic, smut, rust and brown stripe diseases, and the results showed that 18 germplasm accessions were resistant to these diseases. Based on the experimental results, 8 accessions from USA and 4 accessions from Vietnam were selected for the next variety test. This study would provide excellent resistant germplasm materials and scientific references for further sugarcane disease resistance breeding.
Highlights
Sugarcane (Saccharum officinarum) is the main sugar crop and cash crop in tropical and subtropical areas (Chen et al, 2015; Li et al, 2015)
The purpose of this study was to detect the status of Fiji disease virus (FDV) and leaf scald (Xanthomonas albilineans) in the newly introduced sugarcane germplasms from USA and Vietnam, and observe their agronomic performances in Guangxi sugarcane growing area, to provide references for screening healthy sugarcane germplasm
In order to understand the disease resistance of 41 sugarcane varieties introduced by Suguarcane Research Institute of Guangxi Academy of Agricultural Sciences from USA and Vietnam as well as their characteristics under local climate conditions in Guangxi, sugercane FDV and leaf scald diseases were detected and important agronomic traits were observed in this study, which would help explore the utilization potential of these introduced sugarcane germplasms in sugarcane breeding in Guangxi and provide important information and reference for sugarcane hybrid parents
Summary
Sugarcane (Saccharum officinarum) is the main sugar crop and cash crop in tropical and subtropical areas (Chen et al, 2015; Li et al, 2015). Leaf scald disease is Molecular Plant Breeding 2019, Vol., No.13, 100-107 http://genbreedpublisher.com/index.php/mpb caused by Xanthomonas albilineans (Ashby Dowson) It has been reported in many countries and regions, such as USA, Cambodia, Vietnam, Thailand and so on, where outbreaks have caused huge economic losses (Hoy and Grisham, 1994; Rott et al, 1995; Saumtally et al, 2004). It has been reported in Guangxi, Hainan and Fujian of China, especially in recent years, sugarcane varieties infected with leaf scald have been popularized and planted, resulting in more severe leaf scald disease (Li et al, 2018; Wei et al, 2018).
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