Topic
Ectropis
About: Ectropis is a research topic. Over the lifetime, 8 publications have been published within this topic receiving 29 citations.
Papers
TL;DR: The whole matter seems to hinge on the validity of Gray's definition of a specie~ most of the disputants, alt!lough probably not aware that Gray had ever used the phrase, ~u'gued as if it were perfectly~.
Abstract: I . INTRODUCTORY. (1) Geizeral. "Species are but judgments--judgment,s of variable value and often very fallible judgments" says Asa Gray, and certainly no genus would seem to bear more eloquent testimony to the apparent truth of the dictum than Tephrosia. Generation after generation of entomologists have used certain of its members as a kind of battleground upon which to conduct their wordy warfare as to what constitutes a speciea However, it must be assumed that all of its membel~ have formed such acute subjects for controversy; everyone, no matter whether his tendencies were to "lump" or to "split," has ever ventured to refuse specific rank to "lbphrosia luridata (extersaria) and T. consonaria, for their position is unassailable. Far different ~ is it with Tephrosia crepusc~laria and T. bistortata. Some have maintained that the two represented, at best, races of the same species, whilst othem have just as stoutly insisted that they were specifically distinct. And strangely enough, although the holdem of identical views did not necessarily agree amongst themselves in the reasons for the faith that was in them, each of the contending factions could only see its side of the shield, and so the battle continued. Neither side would give way, and therefore on everyoccasion that the question was raised it ended with naattel~ practically in their original position. To me the whole matter seems to hinge on the validity of Gray's definition of a specie~ Most of the disputants, alt!lough probably not aware that Gray had ever used the phrase, ~u'gued as if it were perfectly
14 citations
TL;DR: The results of the present study might contribute in deciphering the mechanism for premating isolation in these species and may be of use in devising strategies for their management.
Abstract: The sibling species Ectropis grisescens and E. obliqua are the major chewing tea pests in China. A difference in sex pheromone components plays a central role in premating isolation in these two species. To investigate the mechanism of premating isolation in these two Ectropis species, we sequenced the transcriptomes of the antennae of female and male E. obliqua individuals and performed phylogenetic analyses, abundance analyses, and tissue expression profile analyses to compare the olfactory genes involved in the detection of sex pheromones. A total of 36 odorant-binding proteins (OBPs) and 52 olfactory receptors (ORs) were identified in E. obliqua. Phylogenetic analyses showed that EoblOBP2, 3, and 25 were grouped in the pheromone-binding protein clade with EgriOBP2, 3, 25, and another lepidopteran PBP. EoblOR25 and 28 were grouped with EgriOR25, 28, and pheromone receptors for the detection of Type-I sex pheromone components. EoblOR24, 31, 37, and 44 were grouped with EgriOR24, 31, 37, and 44. All of these 4 EoblORs and 4 EgriORs showed higher abundance in male antennae than in female ones. Therefore, OBP2, 3, 25 and OR24, 31, 37, 44 of E. grisescens and E. obliqua might be responsible for sex pheromone component detection. However, the sequences of these genes in E. grisescens and E. obliqua were more than 90% identical. This indicates that these orthologous genes might play similar roles in the detection of sex pheromones. In contrast, the observed OBPs and ORs differed in abundance between the antennae of the two Ectropis species. Therefore, we speculate that these two Ectropis species use the different transcript levels of PRs to differentiate sex pheromone components. The results of the present study might contribute in deciphering the mechanism for premating isolation in these species and may be of use in devising strategies for their management.
8 citations
TL;DR: In this article, the authors compared the macroglomerular complex (MGC) of the antennal lobe (AL) between the males of Ectropis obliqua (E. grisescens) and E. melanoglossus (Emmelophilus) by immunostaining using presynaptic antibody and propidium iodide (PI).
Abstract: Ectropis obliqua and Ectropis grisescens are two sibling moth species of tea plantations in China. The male antennae of both species can detect shared and specific sex pheromone components. Thus, the primary olfactory center, i.e., the antennal lobe (AL), plays a vital role in distinguishing the sex pheromones. To provide evidence for the possible mechanism allowing this distinction, in this study, we compared the macroglomerular complex (MGC) of the AL between the males of the two species by immunostaining using presynaptic antibody and propidium iodide (PI) with antennal backfills, and confocal imaging and digital 3D-reconstruction. The results showed that MGC of both E. obliqua and E. grisescens contained five glomeruli at invariant positions between the species. However, the volumes of the anterior-lateral glomerulus (ALG) and posterior-ventral (PV) glomerulus differed between the species, possibly related to differences in sensing sex pheromone compounds and their ratios between E. obliqua and E. grisescens. Our results provide an important basis for the mechanism of mating isolation between these sibling moth species.
4 citations
Journal Article•
3 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2021 | 1 |
| 2019 | 1 |
| 2018 | 1 |
| 2008 | 1 |
| 2007 | 1 |
| 2006 | 1 |