Transcriptomic analysis at the first instar larval stage of nonmolting Bombyx mori mutant (a42)

文献类型： 外文期刊

第一作者： Sun, Xia

作者： Sun, Xia;Zhang, Kaixiang;Qin, Sheng;Zhang, Guozheng;Li, Muwang;Sun, Xia;Qin, Sheng;Zhang, Guozheng;Li, Muwang

作者机构：

关键词： holometabolous insect; molting; RNA-sequencing; tyrosine metabolism

期刊名称：ARCHIVES OF INSECT BIOCHEMISTRY AND PHYSIOLOGY （ 影响因子：1.698； 五年影响因子：1.758 ）

ISSN： 0739-4462

年卷期： 2020 年 104 卷 1 期

页码：

收录情况： SCI

摘要： The life cycle of the holometabolous insect Bombyx mori (Linnaeus) consists of the embryo, larva, pupa, and adult stages with six larval molts. Ecdysone and juvenile hormones play important roles in the growth and development of the silkworms. The a42 silkworm mutant is recessive and homozygous lethal by exhibiting a dark-colored and small body size and fails to molt to second instar. We compared the gene expression of a42 mutants with normal individuals at the first larval molting stage to elucidate the physiological influence of the a42 mutation on the growth and development of silkworms. The transcriptomic sequencing results revealed that 1,411 genes are differentially expressed in a42 mutants, compared with wild-type control silkworms, in which 791 genes are upregulated and 620 genes are downregulated. Gene Ontology/Kyoto Encyclopedia of Genes and Genomes analyses identified differentially expressed genes (DEGs) assigned to biological pathways, such as pentose and glucoronate interconversions, glycerolipid metabolism, folate biosynthesis, amino sugar, and nucleotide sugar metabolism. Two hydroxylases of phenylalanine hydroxylase (BmPAH) and tyrosine hydroxylase (BmTh) are upregulated in a42 mutants. The influence of a42 mutation on these DEGs reveals that melanin metabolism plays an important role during the molting process in silkworms.

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