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由中国农科院水稻研究所科研人员发现的水稻抗白背飞虱新基因日前被国际植物基因命名委员会正式命名为Wbph6。这是我国水稻抗白背飞虱研究领域在国际上注册的、完全拥有自主知识产权的第一个抗性基因。水稻研究所副所长李西明博士介绍,筛选鉴定出水稻抗白背飞虱抗性基因,选育抗 相似文献
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墨西哥政府补贴助农 抵御市场风险 总被引：1，自引：0，他引：1
由我国科研人员发现的水稻抗白背飞虱新基因日前被国际植物基因命名委员会正式命名为Wbph6。这是我国水稻抗白背飞虱研究领域在国际上注册的、完全拥有自主知识产权的第一个抗性基因。 相似文献
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由中国农科院水稻研究所科研人员发现的水稻抗白背飞虱新基因日前被国际植物基因命名委员会正式命名为Wbph6。这是我国水稻抗白背飞虱研究领域在国际上注册的、完全拥有自主知识产权的第一个抗性基因。 相似文献
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近些年来,由于广德县大面积推广种植抗褐飞虱而不是抗白背飞虱的杂交水稻以及耕作制度的改变,导致白背飞虱的种群数量急剧上升和发生面积明显增加,大发生的频率大大增加,对水稻的危害越来越严重。该文介绍了2016年广德县白背飞虱的发生情况,提出了防治原则、防治目标以及综合防治技术,以供参考。 相似文献
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白背飞虱对南方水稻黑条矮缩病传毒效率的影响 总被引：1，自引：0，他引：1
《西南农业学报》2016,(12)
为完善水稻对南方水稻黑条矮缩病抗性的评价方法提供理论依据,运用RT-PCR检测法及其他常规方法研究不同虫态、不同接虫密度对白背飞虱传播SRBSDV的能力、不同水稻生育期对白背飞虱传毒效率影响、白背飞虱饲毒时间和传毒时间对南方水稻黑条矮缩病发病率的影响。结果表明,同一虫态白背飞虱不同的接虫密度水稻发病率不同,接虫密度增加发病率增高;随着虫龄增大而白背飞虱传毒效率增高。接虫密度2头/苗、3头/苗时,4~5龄和长、短白背飞虱型成虫传毒引起水稻发病率均达到100.00%。不同水稻生育期影响白背飞虱传毒效率。接虫后,1叶期至30 d苗龄水稻发病率均为100.00%,40、50、60和70 d苗龄水稻发病率依次为91.30%、4.17%、0.00%和0.00%。随着白背飞虱饲毒时间或传毒时间加长,水稻发病率会不断增高。当白背飞虱饲毒时间为60.18 h或传毒时间为26.34 h时,水稻发病率均达到100.00%。因此,进行水稻品种抗SRBSDV人工接种鉴定时,传毒介体白背飞虱饲毒时间不应低于60.18 h,待测苗20~25 d苗龄时接虫,接虫密度为每苗接2头带毒4~5龄若虫或成虫,传毒时间不应低于26.34 h。建议对现有的抗白背飞虱水稻品种(材料)进行抗SRBSDV鉴定,从中发掘抗病材料,为水稻抗性育种工作者选择提供抗源材料。 相似文献
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《南京农业大学学报》2017,(6)
[目的]白背飞虱及其传播的南方黑条矮缩病危害日益加剧,严重危及水稻生产。本研究旨在发掘水稻抗白背飞虱基因,为抗白背飞虱品种培育提供有用的基因资源。[方法]利用高抗白背飞虱水稻品种‘IR13427-45-2-1-2-2-2’(简称‘IR13427’)与感虫品种‘宁粳3号’构建1个包含92个家系的F2:3群体,进行白背飞虱抗性鉴定,选取极端个体进行连锁分析,构建有连锁迹象的染色体连锁图谱,运用MAPMAKER/EXP Version 3.0软件进行QTL(quantitative trait locus)检测。[结果]利用10个极感和12个极抗个体,在第5、6和9染色体上发现连锁迹象,构建了这3条染色体的连锁图谱,进行QTL检测,结果在第5和第6染色体检测到2个QTL,分别命名为q WBPH5和q WBPH6,贡献率分别为11.90%和18.30%,LOD值为2.42和3.28。[结论]籼稻品种‘IR13427’对白背飞虱的抗性由数量性状位点控制,本研究检测到2个抗白背飞虱QTL,为水稻抗白背飞虱基因的克隆及品种培育奠定基础。 相似文献
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水稻品种对白背飞虱取食及产卵行为的影响 总被引：2，自引：0，他引：2
以感虫品种Taichung Native 1(TN1)和Rathu Heenati(RHT)为对照,以取食量、产卵痕数、产卵量和卵孵化率为测定指标,研究了白背飞虱(Sogatella furcifera)在6个水稻品种上的取食与产卵行为的差异性.结果表明,水稻品种对白背飞虱的抗性表现出3种类型,即拒取食性为主、拒产卵性为主和拒取食性兼有拒产卵作用;水稻品种对白背飞虱拒取食和拒产卵作用间有一定相关性;水稻感、抗品种间卵的孵化率(发育率)无明显差异;在水稻抗白背飞虱产卵性的研究中,延长饲养时间是十分必要的. 相似文献
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《现代农业科技》2017,(8)
为了全面和准确地评价德宏主栽水稻品种对稻瘟病、白背飞虱的抗性,为当地农药减量实施提供技术支撑,对云南23个主栽优质水稻品种采用成株期间自然种群发生鉴定法在德宏州进行稻瘟病、白背飞虱的田间抗性测定评价。结果表明,供试的23个材料在德宏州品种间叶瘟、穗颈瘟的抗性水平差异不明显。叶瘟没有免疫(IM)品种,高抗(HR)品种有2个,其余品种为抗(R);穗瘟没有高抗(HR)品种,所有参试品种表现为抗(R);叶瘟病情指数小于穗颈瘟病情指数。在水稻分蘖期、孕穗期进行白背飞虱和天敌田间发生量的调查,通过相关性分析可知:天敌与白背飞虱田间虫量达到了1∶1的平衡,各生育期白背飞虱百丛虫量166头/百丛,天敌对控制白背飞虱发生的贡献很大,分蘖期蜘蛛与白背飞虱有显著的负相关性,说明分蘖期蜘蛛对白背飞虱起到重要控制作用。 相似文献
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总结了1995年以来金坛地区白背飞虱的测报与发生情况,对田间虫卵量高的年份作了重点分析,并对白背飞虱的测报与防治药种提出了合理的建议。 相似文献
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JIANG Li-ben ZHU Zhan-fei GE Lin-quan YANG Guo-qing WU Jin-cai 《中国农业科学(英文版)》2014,(11):2460-2470
The rice leaffolder （RLF）, Cnaphalocrocis medinalis Guenée （Lepidoptera：Pyralidae）, and the white-backed rice planthopper （WBPH）, Sogatella furcifera Horváth （Hemiptera： Delphacidae）, are major insect pests in China and several other Asian countries. These two pests commonly occur simultaneously or in a temporal sequence. Thus, the investigation of the effect of complex infestations or temporal sequence infestations by these pests on rice yield has a practical signiifcance for the control of these pests. The present study comprised experiments with the following four different variables in potted rice at the tillering stage：single pest species infestation, complex infestation, complete combination infestation and temporal sequence infestation （C. medinalis infestation prior to S. furcifera and S. furcifera infestation prior to C. medinalis）. The results showed that the four infestations resulted in a signiifcant decrease in 1 000-grain weight （1 000GW） and rate of yield loss （RYL） but an increase in blighted grain rate （BGR）, with a signiifcant positive correlation with the infestation density. However, the inlfuences of the complex infestation, complete combination infestation or sequence infestation on the 1 000GW, BGR and RYL were greater than those of the single pest species infestations but did not have addition effects, i.e., the effects of the complex infestation and combination infestation or sequence infestation on the 1 000GW, BGR and RYL were less than the additive effects of the two single pest species infestations at the same densities. In the condition of the same total infestation pressure, no signiifcant differences in the 1 000GW, BGR and RYL were found between C. medinalis infestation prior to S. furcifera and S. furcifera infestation prior to C. medinalis as well as between the sequence infestation and the complex infestation. 相似文献
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LI Xi-ming MA Liang-yong LIU Guang-jie ZHUANG Jie-yun SHEN Jun-hui MIN Shao-kai 《中国农业科学(英文版)》2002,1(3):319-322
The paper reports the study on resistance in 6 newly-bred rice varieties, such as Nongxiang 16and 9234, to the whitebacked planthopper, Sogatella furcifera. In crossing with the susceptible Taichnng Native 1 (TN1), the resistance of their F1 and F2 populations and the back-crossed BC1F1 populations have been evaluated. The resistance to S. furcifera in Zhenongda 6022, 9234 and Zhongjian 96-3 was controlled by a single dominant gene, and by a single recessive gene in Nongxiang 16, R40 and Shuhui 881, respectively.These varieties possessed good agronomical characteristics and could be used in further rice breeding and rice production. 相似文献
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LU Zeng-bin ;HAN Nai-shun ;TIAN Jun-ce ;PENG Yu-fa ;HU Cui ;GUO Yu-yuan ;SHEN Zhi-cheng ;YE Gong-yin 《中国农业科学(英文版)》2014,(12):2678-2689
Numerous Bt rice lines expressing Cry protein derived from Bacillus thuringiensis Berliner （Bt） have been developed since 1989. However, the potential risks posed by Bt rice on non-target organisms still remain debate. The white-backed planthopper （WBPH）, Sogatella furcifera （Horváth）, is one of the most economically important insect pests of rice in Asian countries and also one of the main non-target herbivores of transgenic rice. In the current study, impacts of transgenic cry1Ab/vip3H＋epsps rice （G6H1） with both insect and herbicide resistance on WBPH were evaluated to ascertain whether this transgenic rice line had potential risks for this sap-sucking pest under laboratory and ifeld conditions. The laboratory results showed that no signiifcant difference in egg developmental duration, nymphal survival rate and female fecundity was found for WBPH between G6H1 and its non-transgenic isoline （XS110）. However, the development duration of nymphs was signiifcantly shorter and female longevity signiifcantly longer when WBPH fed on G6H1 by comparison with those on its control. To verify the results found in laboratory, a 3-yr ifeld trial was conducted to monitor WBPH population using both the vacuum-suction machine and beat plate methods. Although the seasonal density of WBPH nymphs and total density of nymphs and adults were not signiifcantly affected by transgenic rice regardless of the sampling methods, the seasonal density of WBPH adults in transgenic rice plots was slightly lower than that in the control when using the vacuum-suction machine. Based on these results both from laboratory and ifeld, it is clear that our tested transgenic rice line will not lead higher population of WBPH. However, long-term ifeld experiments to monitor the population dynamics of WPBH at large scale need to be conducted to conifrm the present conclusions in future. 相似文献
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初步鉴定衡阳地区稻田飞虱有７属１０种，３种主要飞虱中，早稻乳熟期前以白背飞虱为主，乳熟期后以褐飞虱为主；晚稻孕穗、抽穗期前以白背飞虱为主，后以褐飞虱为主；灰飞虱无论早、稻上均居第三位，全年飞虱混俣种群量以早、晚稻穗期发生量最大，一般褐飞虱廷入较晚，只有明显的５代，白背飞虱廷入稍早，可发生６代。 相似文献
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田间试验结果表明:25%甲维.毒死蜱水乳剂1500~1800 mL/hm2对水稻白背飞虱具良好的防治效果,其中25%甲维.毒死蜱水乳剂1500 mL/hm2的控虫效果优于25%甲维.毒死蜱乳油同剂量的效果;明显低于吡蚜酮对白背飞虱的控制效果;药后1 d,25%甲维.毒死蜱水乳剂1500~1800 mL/hm2对田间主要蜘蛛有一定的杀伤率(46.51%~56.60%),但杀伤率低于25%甲维.毒死蜱乳油1500 mL/hm2和毒死蜱处理;药后15 d,25%甲维.毒死蜱水乳剂对稻田主要蜘蛛无杀伤作用。25%甲维.毒死蜱水乳剂防治水稻白背飞虱的剂量应不低于1800 mL/hm2。 相似文献
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本文介绍了应用10%蚜虱净1000、2000、4000倍液浸种对水稻苗期害虫控制效果和安全性。试验结果表明:用10%蚜虱净浸种,不但使用方便,而且能较长时间有效地控制水稻苗期的主要害虫如稻飞虱、稻蓟马、稻蝗等,有利于减少用药次数,节约用工,避免环境污染;尤其对白背飞虱的控制能有效地切断条纹叶枯病的毒源,达到治虫防病的目的,确保水稻前期正常生长。 相似文献