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1. Revision of a common erythroneurine pest occurring on peach trees in China (Hemiptera: Cicadellidae: Typhlocybinae) | |||
CAO Yanghui,ZHANG Yalin | |||
Agronomy 22 July 2013 | |||
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Abstract:A common leafhopper pest on peach trees, Táoyīdiǎnyèchán (桃一点叶蝉), has previously been misidentified as Erythroneura sudra (Distant, 1908). The correct identification is here shown to be Singapora shinshana (Matsumura, 1932) based on available descriptions, illustrations and records of distribution and host plants. Habitus photos and illustrations of the male genitalia for both species are provided for comparison. | |||
TO cite this article:CAO Yanghui,ZHANG Yalin. Revision of a common erythroneurine pest occurring on peach trees in China (Hemiptera: Cicadellidae: Typhlocybinae)[OL].[22 July 2013] http://en.paper.edu.cn/en_releasepaper/content/4552933 |
2. The complete mitochondrial genome of Gynaephora menyuanensis (Lepidoptera: Lymantriidae) from the Qinghai-Tibetan Plateau | |||
YUAN Minglong,ZHANG Qilin | |||
Agronomy 24 February 2013 | |||
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Abstract:We sequenced and annotated the complete mitochondrial genome (mitogenome) of Gynaephora menyuanensis (Lepidoptera: Lymantriidae), which is a major pest in alpine meadows and endemic to the Qinghai-Tibetan Plateau. This mitogenome is 15,770 bp in length with an A+T content of 81.48%, and contains 37 typical animal mitochondrial genes that are arranged in the same order as that of other lepidopteran species. All protein-coding genes (PCGs) start with a typical ATN codon, with the exception of cox1, which begins with CGA. Eleven PCGs stop with termination codon TAA, whereas cox2 and nad4 have single T as the incomplete stop codon. All of the 22 transfer RNA genes present the typical clover leaf secondary structure. The A+T-rich region is located between rrnS and trnM with a length of 449 bp, and contains a 19 bp poly-T stretch as found in other lepidopteran mitogenomes. This is the second completely sequenced mitogenome from the family Lymantriidae of Lepidoptera, providing important molecular information to phylogenetic and population genetic researches. | |||
TO cite this article:YUAN Minglong,ZHANG Qilin. The complete mitochondrial genome of Gynaephora menyuanensis (Lepidoptera: Lymantriidae) from the Qinghai-Tibetan Plateau[J]. |
3. Comparative population genetics of Liposcelis bostrychophila and L. entomophila, from China inferred by analysis of the mitochondrial Cytb Gene | |||
WEI Dandan,WU Jingjing,DOU Wei,WANG Jinjun | |||
Agronomy 10 January 2012 | |||
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Abstract:The psocids Liposcelis bostrychophila and L. entomophila (Psocoptera: Liposcelididae), are two major pests of stored grain and commonly occur on a wide range of stored products. Increasingly, psocids have gained recognition of their importance due to their feeding on stored grains, contaminating food and agricultural commodities. Psocids are difficult to control and exhibit high levels of resistance to various insecticides. Previous research has mainly focused on psocid physiology, biochemistry, and basic biology in grain storage systems. However, the population genetic structure has not been well categorized, which may be useful for understanding the distribution of resistance gene frequencies among psocid populations, gene flow patterns, dispersal of source populations, and the resultant genetic structure among populations. We generated mtDNA sequence data for 148 L. entomophila individuals from ten collecting locations and 103 L. bostrychophila individuals from eight locations in China. Population genetic analyses indicated that the obligatory parthenogenetic L. bostrychophila had high genetic diversity, and is higher than the genetic diversity of sexually reproducing psocid L. entomophila. Both species had a significant genetic structure and significant genetic differentiation existed amongst the populations. The Mantel test indicated that there was no evidence for isolation-by-distance for both species. The neutrality test revealed that the two species might have undergone population expansions in the past in the sampled areas. In addition, population differentiation of both psocids may mainly due to other factors such as genetic drift or inbreeding and less by geographic distance. | |||
TO cite this article:WEI Dandan,WU Jingjing,DOU Wei, et al. Comparative population genetics of Liposcelis bostrychophila and L. entomophila, from China inferred by analysis of the mitochondrial Cytb Gene[OL].[10 January 2012] http://en.paper.edu.cn/en_releasepaper/content/4461243 |
4. Wolbachia infection and its influence on the reproduction of stored-product psocid, Liposcelis tricolor (Psocoptera: Liposcelididae) | |||
Dong Peng,Wang Jinjun,Zhao Zhimo | |||
Agronomy 30 January 2006 | |||
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Abstract:Wolbachia are maternally inherited intracellular bacteria that infect a wide range of arthropods and nematodes and are associated with various reproductive abnormalities in their hosts. The infection of Wolbachia in the species of psocid, Liposcelis tricolor, was investigated through Long PCR amplification of wsp gene. The results showed that the population of L. tricolor was positive for Wolbachia. The phylogenetic relationship of Wolbachia presented in L. tricolor and in other insect hosts was also analyzed. The result showed that Wolbachia strain presented in host of L. tricolor belongs to the B-group. Wolbachia infection in host of L. tricolor could be removed through antibiotic treatment. The results of crosses, including ♀w+×♂w+,♀w-×♂w+ ,♀w+×♂w- and ♀w-×♂w-, suggested that the removal of Wolbachia has resulted in lower eggs production of L. Tricolor. The mean embryonic mortalities of offspring produced by L. tricolor without Wolbachia were significantly higher than that of control. | |||
TO cite this article:Dong Peng,Wang Jinjun,Zhao Zhimo. Wolbachia infection and its influence on the reproduction of stored-product psocid, Liposcelis tricolor (Psocoptera: Liposcelididae)[OL].[30 January 2006] http://en.paper.edu.cn/en_releasepaper/content/5142 |
5. Toxicology and Biochemical Characteristics of GSTs in Liposcelis bostrychophila Badonnel (Psocoptera: Liposcelididae) | |||
Dou Wei,Wang Jinjun,Zhao Zhimo | |||
Agronomy 30 January 2006 | |||
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Abstract:The toxicological and biochemical characteristics of glutathione S-transferases (GSTs) in the resistant and susceptible strains of Liposcelis bostrychophila were investigated. Compared to their susceptible counterparts, the activities per insect and specific activities of GSTs in the DDVP- and PH3- resistant strains (DDVP-R and PH3-R) were significantly higher. The apparent Michaelis-Menten constant ( Km ) for CDNB were obviously lower in DDVP-R and PH3-R (i.e. lower Km values, 1.5625 mM for DDVP-R and 0.6230 mM for PH3-R) as compared with their susceptible counterpart (Km=3.5520), indicating a higher affinity to the substrate CDNB in resistant strains. In contrast, the catalytic activity of GSTs towards CDNB in susceptible strain was significantly higher than those in resistant strains. It was noticeable that when GSH used as substrate, GSTs from resistant strains both indicated a significantly declined affinity. For the catalytic activity of GSTs towards GSH, only the Vmax value in DDVP-R increased significantly compared to that from susceptible strain, suggesting an over expression of GST in this resistant strain. The inhibition kinetics of insecticides to GSTs in vitro revealed that dichlorvos and paraoxon possessed excellent inhibition effects on GSTs. The susceptible strain showed higher sensitivity (I50=0.9004 mM) to dichlorvos than DDVP-R and PH3-R (higher I50s, 8.0955 mM for DDVP-R and 9.3346 mM for PH3-R). As for paraoxon, there was a similar situation. The resistant strains both suggested a higher I50 (1.8735 mM for DDVP-R, and 0.4291 for PH3-R) compared to the susceptible strain (0.2943 mM). These suggested that an elevated detoxification ability of GSTs developed in the resistant strains. | |||
TO cite this article:Dou Wei,Wang Jinjun,Zhao Zhimo. Toxicology and Biochemical Characteristics of GSTs in Liposcelis bostrychophila Badonnel (Psocoptera: Liposcelididae) [OL].[30 January 2006] http://en.paper.edu.cn/en_releasepaper/content/5139 |
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