Neuroethological Basis to Evolution of New Olfactory Communication Systems

新嗅觉通讯系统进化的神经行为学基础

基本信息

项目摘要

Mate finding in most moth species involves long-distance signaling via female-emitted sex pheromones, which have been shown to include a great diversity of chemical structures, even amongst closely related species. The critical importance of these communication signals in the mate recognition system of a species supports the idea that the evolution of the species-specific signals is involved in the speciation process. The conundrum, however, is how signal divergence has occurred because pheromone communication systems appear to possess strong resistance to any changes in the pheromone blends. A surprising discovery of an inactive gene in the sex pheromone gland of female European corn borers that, if it were activated, could be used to produce different pheromone compounds, has shed some light on how major shifts can occur in pheromone production. This gene is not only present, but is active, in the pheromone gland of a closely related and recently (ca. 1 million yrs. ago) evolved species, Asian corn borer, and creates the different blend used by Asian corn borer females. Of equal interest is that 3% of the male European corn borers (rare males) in a laboratory population possess the ability to be attracted to not only to their own females' pheromone components, but also to the much different ones emitted by Asian corn borer females. These broadly responding males might be exactly the type in an ancestral population that could slowly, over generations, track females emitting the new pheromone blend and then develop a preference for the new blend. The shift to preferring the new blend might also include development of inhibition to some of the previous compounds to shut down the attraction of these males to the original ancestral pheromone. This would provide the basis for males from the ancestral population to track slowly over to the new pheromone blend, possibly with some antagonism developing for the original ancestral pheromone blend. In order to understand how male moths can shift their pheromone response from one blend to that of another composed of different compounds requires a comparative study of normal and rare European corn borer males and also Asian corn borer males. The study will include behavioral and electrophysiological responses to attractive pheromone components and also compounds inhibiting attraction of these males to characterize olfactory receptor differences that would allow the shift to occur. It is anticipated that changes in specificity and agonist/antagonist properties of existing receptors in the European corn borer have occurred to generate receptor profiles found in Asian corn borer males. Additional studies will be conducted to test the hypothesis that a major gene controls the rare male phenotype, and that the population frequency of the phenotype can be increased through selection. All the data above should help to shed light on how pheromone blends can change, and, in turn, influence the evolution of new species.
在大多数飞蛾物种中寻找配偶涉及到通过雌性释放的性信息素发出远距离信号,性信息素已被证明包括非常多样化的化学结构,即使在关系密切的物种之间也是如此。这些通讯信号在物种交配识别系统中的关键重要性支持了物种特有信号的进化参与物种形成过程的观点。然而,难题是信号分歧是如何发生的,因为信息素通信系统似乎对信息素混合物中的任何变化具有很强的抵抗力。在欧洲玉米螟雌虫性信息素腺体中发现了一种不活跃的基因,如果它被激活,就可以用来产生不同的信息素化合物。这一惊人的发现揭示了信息素产生的重大变化。这个基因不仅存在,而且是活跃的,在信息素腺体密切相关和最近(约100万年。前)进化的物种,亚洲玉米螟,并创造了亚洲玉米螟雌性所使用的不同混合物。同样令人感兴趣的是,在实验室种群中,3%的欧洲玉米螟雄虫(稀有雄虫)不仅有能力被自己的雌虫信息素成分所吸引,而且还能被亚洲玉米螟雌虫发出的截然不同的信息素成分所吸引。这些反应广泛的雄性可能正是祖先种群中的那种类型,这种类型的祖先可以在几代人的时间里缓慢地跟踪释放新信息素混合物的雌性,然后对新混合物产生偏好。向偏爱新混合物的转变还可能包括对以前的一些化合物产生抑制作用,以切断这些雄性动物对原始祖先信息素的吸引力。这将为雄性从祖先种群中缓慢追踪到新的信息素混合物提供基础,可能会对原始的祖先信息素混合物产生一些对抗。为了了解雄蛾如何将它们的信息素反应从一种混合物转移到另一种由不同化合物组成的混合物中,需要对正常和罕见的欧洲玉米螟雄虫以及亚洲玉米螟雄虫进行比较研究。这项研究将包括对吸引信息素成分的行为和电生理反应,以及抑制这些雄性吸引的化合物,以表征允许这种转变发生的嗅觉受体差异。据预测,欧洲玉米螟现有受体的特异性和激动剂/拮抗剂特性发生了变化,以产生在亚洲玉米螟雄虫中发现的受体图谱。将进行更多的研究来检验这样的假设,即一个主效基因控制罕见的男性表型,并且该表型的群体频率可以通过选择来增加。以上所有数据应该有助于阐明信息素混合物是如何改变的,进而影响新物种的进化。

项目成果

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Wendell Roelofs其他文献

Reidentification of pheromone composition of <em>Sparganothis sulfureana</em> (Clemens) and evidence of geographic variation in male responses from two US states
  • DOI:
    10.1016/j.aspen.2009.04.005
  • 发表时间:
    2009-12-01
  • 期刊:
  • 影响因子:
  • 作者:
    Junwei Zhu;Sridhar Polavarapu;Kye-Chung Park;Carolyn Garvey;Daniel Mahr;Satoshi Nojima;Wendell Roelofs;Tom Baker
  • 通讯作者:
    Tom Baker
Activity of perfluorobutyl-containing components in pheromone blend of cabbage looper moth,Trichoplusia ni
  • DOI:
    10.1007/bf00994611
  • 发表时间:
    1992-05-01
  • 期刊:
  • 影响因子:
    1.800
  • 作者:
    Charles Linn;Wendell Roelofs;Wei-Chuan Sun;Glenn D. Prestwich
  • 通讯作者:
    Glenn D. Prestwich
The pheromone of the eastern tent caterpillar,Malacosoma americanum (F.) (lepidoptera, Lasiocampidae)
  • DOI:
    10.1007/bf02029544
  • 发表时间:
    1996-12-01
  • 期刊:
  • 影响因子:
    1.800
  • 作者:
    Jan Kochansky;Ada Hill;John W. Neal;Jo-Ann Bentz;Wendell Roelofs
  • 通讯作者:
    Wendell Roelofs
Coming to ‘Terms’ with the Journal
  • DOI:
    10.1007/s10886-014-0441-1
  • 发表时间:
    2014-05-17
  • 期刊:
  • 影响因子:
    1.800
  • 作者:
    Wendell Roelofs
  • 通讯作者:
    Wendell Roelofs

Wendell Roelofs的其他文献

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{{ truncateString('Wendell Roelofs', 18)}}的其他基金

Evolutionary Genomics of Moth Sex Pheromone Desaturases
蛾性信息素去饱和酶的进化基因组学
  • 批准号:
    0542358
  • 财政年份:
    2006
  • 资助金额:
    $ 44.69万
  • 项目类别:
    Standard Grant
A Bench-top Gas Chromatograph/Mass Spectrometer for Biologically Significant Compounds and Enzyme Functional Assay Analyses
用于具有生物学意义的化合物和酶功能测定分析的台式气相色谱仪/质谱仪
  • 批准号:
    9988599
  • 财政年份:
    2000
  • 资助金额:
    $ 44.69万
  • 项目类别:
    Standard Grant
Evolution of Unique Desaturases in Moth Sex Pheromone Glands
蛾性信息素腺中独特去饱和酶的进化
  • 批准号:
    9870669
  • 财政年份:
    1998
  • 资助金额:
    $ 44.69万
  • 项目类别:
    Continuing grant
Evolution of Unique Desaturases in Insect Glands
昆虫腺体中独特去饱和酶的进化
  • 批准号:
    9514211
  • 财政年份:
    1996
  • 资助金额:
    $ 44.69万
  • 项目类别:
    Standard Grant
Short-term Visit to Brazil to Initiate Research on the SouthAmerican Fruit Fly Sex Pheromone
短期访问巴西启动南美果蝇性信息素研究
  • 批准号:
    9209085
  • 财政年份:
    1992
  • 资助金额:
    $ 44.69万
  • 项目类别:
    Standard Grant
Hormonal Controls of Moth Sex Pheromone Production
蛾性信息素产生的激素控制
  • 批准号:
    9017793
  • 财政年份:
    1991
  • 资助金额:
    $ 44.69万
  • 项目类别:
    Continuing Grant
U.S.-New Zealand Cooperative Research: Comparative Role of Pheromone Biosynthesis Activating Neuropeptide (PBAN) in Moth Species
美国-新西兰合作研究:信息素生物合成激活神经肽(PBAN)在蛾类中的比较作用
  • 批准号:
    9020580
  • 财政年份:
    1991
  • 资助金额:
    $ 44.69万
  • 项目类别:
    Standard Grant
Acquisition of a Gas Chromatograph/Mass Spectrometer
购买气相色谱仪/质谱仪
  • 批准号:
    8803508
  • 财政年份:
    1988
  • 资助金额:
    $ 44.69万
  • 项目类别:
    Standard Grant
U.S.-New Zealand Cooperative Research on Pheromones of Leafroller Moths (Regulatory Biology)
美国-新西兰卷叶蛾信息素合作研究(调节生物学)
  • 批准号:
    8611459
  • 财政年份:
    1987
  • 资助金额:
    $ 44.69万
  • 项目类别:
    Standard Grant
Moth Sex Pheromone Biosynthesis: Key Enzyme Characteriza- tion
蛾性信息素生物合成:关键酶特征
  • 批准号:
    8711955
  • 财政年份:
    1987
  • 资助金额:
    $ 44.69万
  • 项目类别:
    Continuing grant

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