TY  - JOUR
T1  - Connecting Chromatin Dynamics to Insect Phenotypes across Development, Reproduction, Immunity, Behaviour, and Environmental Plasticity
A1  - Yifan Zhao
A1  - Liang Chen
A1  - Arjun Nair
JF  - Entomology and Applied Science Letters
JO  - Entomol Appl Sci Lett
SN  - 2349-2864
Y1  - 2025
VL  - 12
IS  - 2
DO  - 10.51847/WDATGTTg39
SP  - 55
EP  - 66
N2  - Insect phenotypes emerge through regulatory processes that connect genome organization to temporally and environmentally contingent biological functions, yet these connections are often inferred from chromatin profiles or transcriptional measurements without direct demonstration of organism-level causality. This article develops an original molecular systems synthesis of chromatin-to-phenotype regulation across insect development, metamorphosis, reproduction, immunity, stress responses, behaviour, and environmental plasticity. The approach integrates evidence concerning three-dimensional genome organization, histone variants and modifications, DNA methylation, chromatin accessibility, hormone-responsive regulatory elements, and experimentally perturbed molecular regulators. The strongest defensible synthesis is that chromatin states operate as context-sensitive regulatory constraints and opportunities: they can delimit transcription-factor access, stabilize or reorganize regulatory neighbourhoods, and condition the timing or tissue specificity of gene activation, but they do not independently determine phenotype. Developmental transitions provide the clearest mechanistic evidence because hormonal signals, chromatin accessibility, transcription-factor binding, and tissue transformation can be aligned in time and experimentally perturbed. Evidence for reproduction, immune defence, stress adaptation, behavioural plasticity, and environmental memory is informative but more heterogeneous in species, tissues, exposures, and causal depth. Four interpretation boundaries therefore organize the analysis: chromatin state is not equivalent to causal gene regulation; gene-expression change is not equivalent to organismal phenotype; epigenetic persistence is not equivalent to transgenerational inheritance; and a cross-level systems model is not equivalent to experimental validation. The principal implication is that molecular targets for insect genetic control should be prioritized through staged, tissue-resolved validation that links perturbation, chromatin change, transcriptional consequence, physiological mechanism, and phenotype while testing reversibility, context dependence, and unintended effects.
UR  - https://easletters.com/article/connecting-chromatin-dynamics-to-insect-phenotypes-across-development-reproduction-immunity-behav-qzodcu9zjmptsxp
ER  -