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排序方式: 共有69条查询结果,搜索用时 15 毫秒
1.
本文记述加藤蝉属2新种:太白加藤蝉Katoa taibaiensis与寡刺加藤蝉K.。模式标本存于西北农业大学昆虫博物馆与神经农学院植物保护系。 相似文献
2.
昆虫核酸分子系统学研究进展 总被引:6,自引:0,他引:6
本文从研究对象、方法、类群、内容等方面综述了近十年来昆虫核酸分子系统学研究进展概况。文中首先介绍了RFLPA、探针杂交及DNA指纹、PCR与RAPD-PCR、顺序分析方法及应用情况,列举了在双翅目、膜翅目、同翅目、直翅目等目昆虫中的研究进展,并从居群遗传结构、分类学研究、系统发育和分子进化4个方面总结了昆虫核酸分子系统学的研究内容和主要成果,最后指出RAPD-PCR与RFLP联合用于测序是近期昆虫分子系统学上最有应用价值的方法。 相似文献
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Tomomichi Chonan Hiroaki Tanaka Daisuke Yamamoto Miyoko Yashiro Takahiro Oi Daisuke Wakasugi Ayumi Ohoka-Sugita Fusayo Io Hiroko Koretsune Akira Hiratate 《Bioorganic & medicinal chemistry letters》2010,20(13):3965-3968
Acetyl-CoA carboxylases (ACCs), the rate limiting enzymes in de novo lipid synthesis, play important roles in modulating energy metabolism. The inhibition of ACC has demonstrated promising therapeutic potential for treating obesity and type 2 diabetes mellitus in transgenic mice and preclinical animal models. We describe herein the structure-based design and synthesis of a novel series of disubstituted (4-piperidinyl)-piperazine derivatives as ACC inhibitors. Our structure-based approach led to the discovery of the indole derivatives 13i and 13j, which exhibited potent in vitro ACC inhibitory activity. 相似文献
5.
Chonan T Wakasugi D Yamamoto D Yashiro M Oi T Tanaka H Ohoka-Sugita A Io F Koretsune H Hiratate A 《Bioorganic & medicinal chemistry》2011,19(5):1580-1593
Novel (4-piperidinyl)-piperazine derivatives were synthesized and evaluated as ACC1/2 non-selective inhibitors. Optimization of the substituents on the nitrogen of the piperidine ring led to the identification of the fluorine substituted tert-butoxycarbonyl group. Advanced analog, 1,1,1-trifluoro-2-methylpropan-2-yl 4-{4-[(2-amino-6-methyl-1-benzothiophen-3-yl)carbonyl]piperazin-1-yl}piperidine-1-carboxylate (12c) showed potent inhibitory activities in enzyme-assay and cell-based assays. Compound 12c also exhibited reduction of hepatic de novo fatty acid synthesis in rats after oral administration. 相似文献
6.
Teklehaimanot?HaileselassieEmail author Margaret?mollel Io?Skogsmyr 《Evolutionary ecology》2005,19(3):275-288
Plants have evolved many mechanisms to increase the chance of gene dispersal mainly through pollen and environmental factors play an important role. Understanding the mechanism behind gene dispersal is therefore crucial in the correct evaluation of the use of genetically modified crops for cultivation. In this paper we address the question of weather nutrient availability for the female affects the outcome of pollen competition between two pollen donor cultivars of Cucumis sativus. We do this by carrying out controlled crosses of female plants grown at three different nutrient levels. We separated the effect of a specific donor from the effect of pollen tube growth rate by using reversed crosses of fast and slow pollen. Our results show that female effects on siring ability vary with nutrient level. Pollen with a high pollen tube growth rate was more successful when nutrient availability for the female was high. This could be the result of selection on the female to adjust preference according to environmental circumstances. Pollen tube growth rate was measured under nutrient rich circumstances, thus high performers possessed traits adapted to a nutrient rich situation. Due to trade-off effects, these traits might not be advantageous in poor environments. Instead, individuals adapted to low nutrient circumstances will have a higher pollen tube growth rate. If siring ability varies with the environment of the recipient plant, this means that assessments of gene flow must account for this variation and include both pollen donors and recipient plants subjected to a range of environmental circumstances. In risk assessments of transgenic plants, plants are often kept under experimental, homogenous conditions. If our results also apply to other species, estimates of gene flow under constant conditions may be misleading. Selection on siring ability and female preference have fundamental effects on gene flow and need to be considered in risk assessments of transgenic plants.Co-ordinating editor: I. Olivieri 相似文献
7.
Tamio Ohno Keiko Hata Taisuke Baba Fusayo Io Misato Kobayashi Fumihiko Horio Masahiko Nishimura 《Mammalian genome》2012,23(11-12):764-769
Consomic strains, in which one chromosome is derived from a donor strain and the other chromosomes are derived from the recipient strain, provide a powerful tool for the dissection of complex genetic traits. In this study we established ten consomic strains (A-2SM, A-6SM, A-11SM, A-12SM, A-13SM, A-15SM, A-17SM, A-18SM, A-19SM, A-YSM) using the SM/J strain as the donor and the A/J strain as the recipient; these are the parental strains of a set of SMXA recombinant inbred (RI) strains that we had developed previously. We analyzed body weights and blood lipid levels in the consomic and parental strains. The mean values for each trait showed a continuous range of variation in the consomic strains suggesting that they are controlled by multiple genes. We previously identified suggestive QTLs for body weight on chromosome 6 in SMXA RI strains and (SM/J?×?A/J)F2 mice. The observation that the A-6SM consomic strain had a significantly lower mean body weight than the A/J strain supports the presence of this QTL on chromosome 6. Similarly, the higher blood triglyceride level in the A-11SM strain shows the existence of a previously mapped QTL on chromosome 11, and the A-12SM strain provides evidence of a QTL for blood total cholesterol level on chromosome 12. These consomic strains, along with the previously developed set of SMXA RI strains from A/J and SM/J mice, offer an invaluable and powerful resource for the analysis of complex genetic traits in mice. 相似文献
8.
中国蝴蝶新种, 新亚种及新记录种(Ⅲ)(鳞翅目) 总被引:12,自引:0,他引:12
记述中国粉蝶科1新种,4新亚种,1新型,1中国新记录种及6个《中国蝶类志》未记述的已知种,所有模式标本保存在西北农林科技大学昆虫博物馆。 相似文献
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暗色的种类,斑纹简单明显。翅正面谈揭色;外缘毛褐色,前翅亚项区及后缘Cu2与a室色较深;前翅正中有一孤立的斜心脏形黑色大斑,斑在Cu脉上,一半在中室端部,一半在中室下方。翅反面满布褐色霜雾状坟;外缘深揭色;前翅正中的黑斑隐约可见。 相似文献