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Towards understanding the genetic basis of high-elevation adaptation in Himalayan giant honey bee

ABSTRACT: Apis laboriosa, the Himalayan giant honey bee, is a species of honey bees (genus Apis), which is highly adapted to highland habitats and mainly occurs in mountainous regions, particularly the Himalayas. Up to data, the genetic basis of its high-elevation adaptation remains a mystery. In the present study, we generated transcriptomes for A. laboriosa and its closely related species A. dorsata, we then characterized the transcriptomes and did comparative and evolutionary analysis between them to understand the genetic basis of high-altitude adaptation in A. laboriosa. We identified 1,605 genes that are absent in A. dorsata but present in A. laboriosa. Those A. laboriosa-specific genes were involved in DNA damage repair, low temperature tolerance and oxidative stress response. In addition, for genes shared by the two species, genes related to anoxia tolerance, freeze tolerance and UV irradiation were positively selected in A. laboriosa. Taken together, our results suggest that both the increased copy number and the accelerated protein sequence evolution of genes related to high-elevation adaptation made a difference between A. laboriosa and A. dorsata, which should contribute to the adaptation of A. laboriosa to challenging environments in Himalayas.

ORGANISM(S): Apis laboriosa Apis dorsata

PROVIDER: GSE130963 | GEO | 2019/11/07

REPOSITORIES: GEO

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