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Article Abstract
The spectrin family genes play critical roles in cytoskeletal organization and cellular integrity, yet their evolutionary and functional significance in non-classical model organisms remains poorly explored. Here, we systematically identified and characterized spectrin family genes in the silkworm . Genome-wide analysis identified 17 predicted spectrin genes, which were integrated into eight optimized members through transcriptome-guided structural refinement. Multi-species genomic analysis revealed 8, 23, and 24 spectrin family genes in , , and , respectively. Phylogenetic analysis revealed conserved clades across insects and mammals, with gene family expansions in vertebrates. Spatiotemporal expression profiling demonstrated ubiquitous expression of these genes during silkworm development. Population genomic analyses detected strong selection signatures in during domestication and implicated as a candidate gene for silk yield enhancement in Chinese-improved strains (CHN-I). Expression profiles of parental strains and F offspring from a commercial hybrid cross (Jingsong × Haoyue) revealed expression correlating with heterosis in silk yield traits. This study elucidates the characterization and functional relevance of silkworm spectrin genes, providing insights into their roles in domestication and breeding.
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| http://dx.doi.org/10.3390/insects16060556 | DOI Listing |
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