Results 171 to 180 of about 3,312 (209)

Isolation and characterization of microsatellite loci in the aphid species, Rhopalosiphum padi

Molecular Ecology Notes, 2001
Abstract Due to their properties for resolving patterns of population genetic structure, microsatellites are increasingly used in studies of breeding systems. Here, eight polymorphic microsatellite loci were isolated and characterized in the aphid Rhopalosiphum padi , in ...
Simon, Jean-Christophe, Leterme, Nathalie, Delmotte, François, Martin, Olivier, Estoup, Arnaud   +4 more
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Fungicides have transgenerational effects on Rhopalosiphum padi but not their endosymbionts

Pest Management Science, 2022
AbstractBACKGROUNDWhile several agricultural fungicides are known to directly affect invertebrate pests, including aphids, the mechanisms involved are often unknown. One hypothesis is that fungicides with antibacterial activity suppress bacterial endosymbionts present in aphids which are important for aphid survival.
Evatt Chirgwin, Qiong Yang, Paul A Umina, Alex Gill, Safi Soleimannejad, Xinyue Gu, Perran Ross, Ary A Hoffmann   +7 more
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UGT2B13 and UGT2C1 are involved in lambda-cyhalothrin resistance in Rhopalosiphum padi

Pesticide Biochemistry and Physiology, 2023
Uridine diphosphate-glucuronosyltransferases (UGTs) are major multifunctional detoxification phase II enzymes involved in the metabolic detoxification of xenobiotics. However, their roles in insecticides resistance are still unclear. In this study, we identified two UGTs genes (UGT2B13 and UGT2C1) in Rhopalosiphum padi, a serious insect pest of wheat ...
Suji, Wang, Xi, Liu, Hongcheng, Tang, Mengtian, Li, Ping, Gao, Xiong, Peng, Maohua, Chen   +6 more
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Purification and characterization of a virus from the aphid Rhopalosiphum padi

Virology, 1981
A 27-nm icosahedral virus was purified from the oat bird cherry aphid, Rhopalosiphum padi (L.). The virus had an s(20,w) of 162 +/- 2 S, and bouyant densities of 1.37 in CsCl and 1.35 in Cs2SO4. It contained one ssRNA of 31 +/- 2 S and three major proteins. The relationship of the R. padi virus to other small RNA invertebrate viruses is unclear.
C J, D'Arcy, P A, Burnett, A D, Hewings, R M, Goodman   +3 more
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Ultrastructure of the symbionts and mycetocytes of bird cherry aphid (Rhopalosiphum padi)

Tissue and Cell, 1994
As is known for other aphids, the symbiont cytoplasm in Rhopalosiphum padi is differentiated into a central eccentric and a cortical region which contains electron-lucent nucleoplasm and DNA fibrils. The cytoplasm is surrounded by a plasma membrane, cell wall and perisymbiotic membrane which are separated by periplasmic spaces.
S, Akhtar, H F, van Emden
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Detection, biological effects, and transmission of a virus of the aphid Rhopalosiphum padi

Virology, 1981
A virus infecting an Illinois colony of the aphid Rhopalosiphum padi (L.) was transmitted transovarially, and significantly decreased longevity of infected aphids. The virus was detected by serological assay in R. padi colonies from North Dakota, and in two other aphid species maintained at Illinois, R. rufiabdominalis (Sasaki) and Schizaphis graminum (
C J, D'Arcy, P A, Burnett, A D, Hewings
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Characterization of Rhopalosiphum padi takeout-like genes and their role in insecticide susceptibility

Pesticide Biochemistry and Physiology, 2021
Due to the extensive use of chemical insecticides, the field populations of Rhopalosiphum padi, a serious wheat pest worldwide, have developed resistance to insecticides. Therefore, deep understanding of the mechanisms of the aphid's physiological response to insecticides would be of importance for the management of insecticide resistance in pests ...
Xiong, Peng, Suji, Wang, Lei, Huang, Sha, Su, Maohua, Chen   +4 more
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Effects of Sublethal Cold Stress on the Aphid Rhopalosiphum padi

The Journal of Applied Ecology, 1994
An anholocyclic clone of the aphid Rhopalosiphum padi was reared on leaves of barley seedlings at 20 °C in a 16:8 LD photoperiod. First instar nymphs and newly moulted, pre-reproductive adults were cooled at 1°C min −1 to − 5 and − 7.5 °C, respectively, for 1 and 6 h to represent increasing levels of sublethal cold stress.
L. A. Hutchinson, J. S. Bale
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Antibiosis and antixenosis to Rhopalosiphum padi among triticale accessions

Euphytica, 2005
Tests for antibiosis and antixenosis resistance to Rhopalosiphum padi L., the bird cherry-oat aphid, were conducted among four wheat (Triticum aestivum L.) and eight triticale (XTriticosecale Wittmack) accessions. Tests for antibiosis included measuring R. padi-population growth over 13 days, number of days to reproduction of individual R.
L. S. Hesler, C. I. Tharp
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Molecular characterization of cyclic and obligate parthenogens in the aphid Rhopalosiphum padi (L.)

Proceedings of the Royal Society of London. Series B: Biological Sciences, 1996
Holocyclic clones of the aphid Rhopalosiphum padi (L.) reproduce by cyclic parthenogenesis, whereas anholocyclic individuals are obligate parthenogens. Mitochondrial DNA and (mtDNA) and random amplified polymorphic DNA markers in R. padi as well as plasmid DNA markers of its bacterial endosymbiont, Buchnera aphidicola, were examined to determine the ...
Simon, Jean-Christophe, Martinez-Torres, D., Latorre, Amandine, Moya, A., Hebert, P.D.N.   +4 more
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