Abstract:

The disease caused by Barley Yellow Dwarf Viruses (BYDVs) is a major, economically important that infect cereal crops including barely, wheat and highland barely worldwide. In 2010, BYDVs are moderately popular in the east of Qinghai Province, in China. In order to identify the serotype of BYDVs, 112 samples were collected from the east regions of Qinghai Province and assayed by ELISA and NASH. The results confirmed that the GAV of BYDV was predominant in these areas. Sequences of coat protein gene of BYDV-GAV isolates obtained from Qinghai Province were aligned at amino acid level and compared with those of other luteoviruses. The results of sequence comparisons showed that the CP gene of GAV shared a high degree of sequence conservation between some isolates from Qinghai and the others from different regions of China. The fact that the main strains and molecular variation of BYDV in the east regions of Qinghai Province were obtained, which would afford a valuable reference to work on breeding resist to BYDVs. It is also essential to direct prevention and cure of BYDVs in these regions.