Juvenile hormone in adult eusocial hymenoptera: Gonadotropin and behavioral pacemaker

Robinson, Gene E.; Vargo, Edward L.

doi:10.1002/(sici)1520-6327(1997)35:4<559::aid-arch13>3.0.co;2-9

Cited by 289 publications

(208 citation statements)

References 97 publications

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“…Juvenile Hormone (JH) regulates larval molting and reproductive development in many insects (63). Increases in JH titer have also been shown to induce soldier-caste differentiation in termites (64) and behavioral changes in A. mellifera workers (65,66). Interestingly, S. invicta harbors >30 putative juvenile hormone binding protein (JHBPs; PF06585, Dataset S1) encoding genes, more than half of which are located in a single 600,000-bp region.…”

Section: Vg4mentioning

confidence: 99%

The genome of the fire ant Solenopsis invicta

Wurm

Wang

Riba‐Grognuz

et al. 2011

Proc. Natl. Acad. Sci. U.S.A.

325

338

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Ants have evolved very complex societies and are key ecosystem members. Some ants, such as the fire ant Solenopsis invicta, are also major pests. Here, we present a draft genome of S. invicta, assembled from Roche 454 and Illumina sequencing reads obtained from a focal haploid male and his brothers. We used comparative genomic methods to obtain insight into the unique features of the S. invicta genome. For example, we found that this genome harbors four adjacent copies of vitellogenin. A phylogenetic analysis revealed that an ancestral vitellogenin gene first underwent a duplication that was followed by possibly independent duplications of each of the daughter vitellogenins. The vitellogenin genes have undergone subfunctionalization with queen-and worker-specific expression, possibly reflecting differential selection acting on the queen and worker castes. Additionally, we identified more than 400 putative olfactory receptors of which at least 297 are intact. This represents the largest repertoire reported so far in insects. S. invicta also harbors an expansion of a specific family of lipid-processing genes, two putative orthologs to the transformer/feminizer sex differentiation gene, a functional DNA methylation system, and a single putative telomerase ortholog. EST data indicate that this S. invicta telomerase ortholog has at least four spliceforms that differ in their use of two sets of mutually exclusive exons. Some of these and other unique aspects of the fire ant genome are likely linked to the complex social behavior of this species.social insect | caste differences | nonmodel organism | de novo genome assembly

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Section: Vg4mentioning

confidence: 99%

The genome of the fire ant Solenopsis invicta

Wurm

Wang

Riba‐Grognuz

et al. 2011

Proc. Natl. Acad. Sci. U.S.A.

325

338

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“…In the highly eusocial honey bee, A. mellifera, the JH and insulin/insulin-like growth factor-1 (IIS) signaling pathways, as well as the yolk protein precursor vitellogenin (vg), interact with one another and function in novel ways that are important in multiple social contexts. JH does not function as a gonadotropin in adult honey bees as it does in most insects; instead, it plays a strong role in caste determination and worker division of labor (81). The IIS signaling pathway interacts with JH and is also involved in worker division of labor.…”

Section: Metabolism and Nutritionmentioning

confidence: 99%

Molecular evolutionary analyses of insect societies

Fischman

Woodard

Robinson

2011

Proc. Natl. Acad. Sci. U.S.A.

Self Cite

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The social insects live in extraordinarily complex and cohesive societies, where many individuals sacrifice their personal reproduction to become helpers in the colony. Identifying adaptive molecular changes involved in eusocial evolution in insects is important for understanding the mechanisms underlying transitions from solitary to social living, as well as the maintenance and elaboration of social life. Here, we review recent advances made in this area of research in several insect groups: the ants, bees, wasps, and termites. Drawing from whole-genome comparisons, candidate gene approaches, and a genome-scale comparative analysis of protein-coding sequence, we highlight novel insights gained for five major biological processes: chemical signaling, brain development and function, immunity, reproduction, and metabolism and nutrition. Lastly, we make comparisons across these diverse approaches and social insect lineages and discuss potential common themes of eusocial evolution, as well as challenges and prospects for future research in the field.comparative genomics | molecular evolution | social evolution | sociogenomics

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“…Therefore, the systems observed in Diacamma may exist in other social hymenopterans. The dynamics of insulin-like peptides and interactions between IIS and other reproductive regulators such as juvenile hormones and ecdysteroids (Röseler et al, 1984(Röseler et al, , 1985Robinson et al, 1992;Bloch et al, 1996Bloch et al, , 2000Robinson and Vargo, 1997;Brent et al, 2003Brent et al, , 2006Sommer et 28 al., 1993) are fundamental foci for further understanding of reproductive division of labor. Through comparative analyses of ovarian histology and gene regulatory networks for oogenesis (e.g., Khila and Abouheif, 2008;Tanaka and Hartfelder, 2009), the links between social interaction and the arrest of oogenesis can provide developmental and evolutionary insights into the reproductive division of labor.…”

Section: Insulin Signaling and Reproductive Division Of Labormentioning

confidence: 99%