Enormous expansion of the chemosensory gene repertoire in the omnivorous German cockroach Blattella germanica.
作者： Hugh M. Robertson , Rachel L. Baits , Kimberly K.O. Walden , Ayako Wada-Katsumata , Coby Schal
DOI: 10.1002/JEZ.B.22797
关键词:
摘要: The acquisition of genome sequences from a wide range insects and other arthropods has revealed broad positive correlation between the complexity their chemical ecology size chemosensory gene repertoire. German cockroach Blattella germanica is an extreme omnivore largest repertoire known for arthropod, exceeding even highly polyphagous spider mite Tetranychus urticae. While Odorant Receptor family not particularly large, with 123 genes potentially encoding 134 receptors (105 intact), Gustatory greatly expanded to 431 545 (483 second only mite. Ionotropic olfactory gustatory vastly at least 897 (604 in arthropods, far surpassing 150 dampwood termite Zootermopsis nevadensis. Commensurately, Binding Protein 109 (all intact). Comparison more specialized, but phylogenetically related termite, within Dictyoptera, reveals considerable losses massive species-specific expansions cockroach. lost function 11%-41% these three chemoreceptor families pseudogenization, most are young events, implying rapid turnover along major expansions, presumably response changes its ecology.
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