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The complete nucleotide sequences of two Chinese isolates of Beet soil-borne virus (BSBV) from the Inner Mongolia and Xinjiang provinces (designated BSBV-IM and BSBV-XJ, respectively) were found to share around 99% sequence identity with that of a previously reported German isolate (BSBV-G). The genome organization of the three isolates was identical. A diversity index (Pi) analysis indicated that the overall nucleotide variability of all RNAs among the three isolates was <7%, only for the 5′ part of the first triple gene block gene on RNA3 was it >6%. Although the 3′ end of BSBV RNA 3 was previously reported to be highly variable, the results of this study show that the total BSBV genomes are considerably conserved, especially RNAs 1 and 2. [ABSTRACT FROM AUTHOR]

The article reports on the Beet soil-borne virus on sugar beet in China. It is stated that Beet Virus Q (BVQ) and Beet soil-borne virus (BSBV) are two members of the genus Pomovirus that are transmitted by Polymyxa betae. It is said that in the growing season of 2006, 26 roots of sugar beet exhibiting moderate to severe symptoms of rhizomania were collected from three fields located Inner Mongolia and Xinjang Provinces for a survey to determine whether BSBV and BVQ were present in China. It is inferred that the nucleotide sequences, RT-PCR detection, and symptoms on inoculated host plants confirm the presence and first occurrence of BSBV in Inner Mongolia and Xinjiang.