Expansion of three types of transposon superfamilies within 25 Mya lead to large genome size of a rice insect pest
文献类型： 外文期刊
作者： He, Bingbing 1 ; Cong, Yuyang 2 ; Xu, Le 2 ; Liu, Ying 1 ;
作者机构： 1.Yunnan Acad Agr Sci, Agr Environm & Resource Res Inst, Key Lab Green Prevent & Control Agr Transboundary, Kunming 650205, Peoples R China
2.Zhejiang Univ, Inst Insect Sci, Coll Agr & Biotechnol, State Key Lab Rice Biol, Hangzhou 310058, Peoples R China
3.Zhejiang Univ, Inst Insect Sci, Coll Agr & Biotechnol, Minist Agr & Rural Affairs,Key Lab Mol Biol Crop, Hangzhou 310058, Peoples R China
关键词： Genome size; Changes; Rice planthopper; Transposon; Expansions
期刊名称：INSECT BIOCHEMISTRY AND MOLECULAR BIOLOGY （ 影响因子：3.7； 五年影响因子：4.1 ）
ISSN： 0965-1748
年卷期： 2025 年 177 卷
页码：
收录情况： SCI
摘要： The brown planthoppers (BPH, Nilaparvata lugens), white backed planthopper (WBPH, Sogatella furcifera) and small brown planthopper (SBPH, Laodelphax striatellus) are widely distributed rice insect pests, causing huge annual yield loss of rice production. Though these three planthoppers belong to the same family, Delphacidae of Hemiptera, their genome sizes (GS) are very different, ranging from 541 to 1088 Mb. To uncover the main factors driving GS changes of three planthoppers, we first estimated the GS of their ancestor Fulgoroidea, to be 794.33 Mb, indicating GS expansion in BPH but contraction in SBPH and WBPH. Next, we identified repetitive sequences and compared the TE landscapes, showed that three types of transposon superfamilies, hAT, Tc1-Mariner and Gypsy, expanded within 25 Mya in BPH. In addition, BPH kept ancient TEs of Fulgoroidea dated back to 175 Mya, while SBPH and WBPH have lost most of these ancient TEs. Here, we present evidence that the gain of recently expanded TEs driving the GS expansion and loss of ancient TEs leading to the GS contraction, providing new insights into the mechanism of GS variation.
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