| population structure and diversity of citrus tristeza virus (ctv) isolates in hunan province, china. | stem-pitting (sp) is the main type of citrus tristeza virus (ctv) that causes severe damage to citrus trees, especially those of sweet orange, in hunan province, china. understanding the local ctv population structure should provide clues for effective mild strain cross-protection (mscp) of the sp strain of ctv. in this study, markers for the p23 gene, multiple molecular markers (mmms), and sequence analysis of the three silencing suppressor genes (p20, p23 and p25) were employed to analyze the ... | 2017 | 27771790 |