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SRBSDV对抗白背飞虱水稻抗虫性的影响
Effects of SRBSDV on the resistance of WBPH-resistant rice varieties
黄所生;秦碧霞;吴碧球;谢慧婷;李 成;李战彪;黄凤宽;蔡健和
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DOI:10.7679/j.issn.2095-1353.2022.108
作者单位:广西壮族自治区农业科学院植物保护研究所,南宁 530007;农业农村部华南果蔬绿色防控重点实验室,南宁 530007; 广西作物病虫害生物学重点实验室,南宁 530007
中文关键词:南方水稻黑条矮缩病病毒;白背飞虱;水稻品种;抗虫性;取食量
英文关键词:southern rice black-streaked dwarf virus; Sogatella furcifera; rice variety; insect resistance; feeding amount
中文摘要:
【目的】 为明确南方水稻黑条矮缩病病毒(Southern rice blackstreaked dwarf virus,SRBSDV)对抗白背飞虱水稻的抗虫性的影响。方法】 在水稻3叶期,每稻苗接入8头1-2龄白背飞虱Sogatella furcifera (Horváth)若虫,参照国际标准评价不同水稻对白背飞虱的抗性表现;每稻苗接入已饲毒且度过循回期的2头白背飞虱高龄若虫,评价不同抗性水平的抗白背飞虱水稻对SRBSDV的抗性。在各水稻成株期分别将不同虫态白背飞虱接到SRBSDV感染的稻株,研究不同抗性水平水稻感染SRBSDV后对白背飞虱取食选择性、取食量、存活率以及产卵量与卵孵化率的影响结果】 中抗、抗和高抗白背飞虱的水稻对SRBSDV的抗性均表现高感,且发病率均在93.55%以上;把无毒白背飞虱若虫分别接入各抗白背飞虱水稻的健康株和SRBSDV病株,48 h后健康株上取食的虫量为1.33-5.33头/株,而在SRBSDV病株上取食的虫量为24.00-46.00头/株,无毒白背飞虱取食选择偏向于SRBSDV病株且其趋性与水稻对白背飞虱的抗性表现之间无明显相关性;白背飞虱成虫在各水稻健康株和感染SRBSDV的病株上取食,48 h后其平均蜜露量分别为1.13-9.55 mg/头和2.97-17.35 mg/头,各抗白背飞虱水稻的感染SRBSDV病株之间白背飞虱的平均蜜露量差异较大,但均显著多于各自健康株上的平均蜜露量;白背飞虱在表现高抗和抗水平水稻上的存活率在15%-44.05%之间,而在感染SRBSDV病株上的存活率显著提高,均在69.21%以上;白背飞虱在各感染SRBSDV抗白背飞虱水稻上无毒白背飞虱能正常产卵及繁殖,且其产卵量和卵孵化率显著多于或高于各自对应健康株结论】 抗白背飞虱的水稻不一定抗SRBSDV;抗白背飞虱水稻感染SRBSDV,有利于提高白背飞虱在取食、存活和繁殖方面对水稻抗虫性的适应度。
英文摘要:
[Objectives]  To detect the effects of the southern rice black-streaked dwarf virus (SRBSDV) on the resistance              of white-backed planthopper (WBPH) resistant rice varieties to the WBPH. [Methods]  8 1st-2nd instar WBPH nymphs were placed on individual rice seedlings to evaluate the resistance of different rice varieties to WBPH, according to the international standard. Each seedling was infected with 2 older nymphs that had been fed with the virus and had passed the cycle period to evaluate the resistance of WBPH-resistant rice varieties to SRBSDV. Different life-stages of WBPH were placed on SRBSDV-infected rice to study the effects of SRBSDV-infection of WBPH-resistant, rice varieties on the feeding selectivity, feeding capacity, survival rate, fecundity and hatchability of WBPH. [Results]  Rice varieties with moderate, resistance and high resistance to WBPH were highly susceptible to SRBSDV, with an incidence rate of more than 93.55%. Non-virus WBPH nymphs were inoculated onto both healthy and SRBSDV-infected, WBPH-resistant rice plants. After 48 hours, healthy plants had 1.33-5.33 nymphs/plant whereas SRBSDV-infected plants had 24.00-46.00 nymphs/plant. WBPH prefered to feed on SRBSDV-infected plants, but there was no significant correlation with the resistance of rice to WBPH. After WBPH adults had fed on healthy and SRBSDV-infected rice plants for 48 hours, the average amount of honeydew was 1.13-9.55 mg/adult and 2.97-17.35 mg/adult, respectively. The average amount of honeydew secreted by WBPH feed on SRBSDV-infected, WBPH-resistant, rice varieties was significantly different and higher than that healthy plants. The survival rate of WBPHs on rice with resistance or high resistance was between 15%-44.05%, whereas their survival rate on plants infected with SRBSDV was significantly higher; > 69.21%. The non-virus WBPH can reproduce normally on on WBPH-resistant rice varieties that are infected with SRBSDV, and egg production and egg hatching rate are significantly higher on infected plants than on healthy plants. [Conclusion]  SRBSDV infection of WBPH-resistant rice improves the feeding, survival and reproduction of the WBPH. WBPH-resistant rice varieties are not necessarily resistant to SRBSDV and the resistance of such varieties is decreased by SRBSDV infection.
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