A Comparative Study on the Population Fitness of Three Strains of Nilaparvata lugens (Hemiptera: Delphacidae) Differ in Eye Color-Related Genes

文献类型: 外文期刊

第一作者: Liu, Shuhua

作者: Liu, Shuhua;Wu, Jincai;Liu, Shuhua;Yang, Baojun;Luo, Ju;Tang, Jian

作者机构:

关键词: Nilaparvata lugens;eye color;near-isogenic line;population fitness;expression level

期刊名称:JOURNAL OF ECONOMIC ENTOMOLOGY ( 影响因子:2.381; 五年影响因子:2.568 )

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年卷期:

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收录情况: SCI

摘要: The brown planthopper, Nilaparvata lugens (Stal), is a destructive insect pest on rice throughout Asia. As a visible genetic marker, red eye mutant colony of brown planthopper is a valuable material. Here, we established the near-isogenic lines, NIL-BB and NIL-rr, through mating red eye females to brown eye brothers for eight successive generations. Biological experiments showed that NIL-BB had big fitness cost; however, NIL-rr had comparable survival and fertility parameters with BB, a normal laboratory brown planthopper strain. Significantly lower number eggs per female and egg hatchability were the key factors resulting in big fitness cost of NIL-BB. The population trend indexes of BB, NIL-rr, and NIL-BB were 52.18, 43.80, and 4.19, respectively. Real-time PCR study suggested that the poorer fertility of NIL-BB was not mediated by the differential expression of genes relating to oogenesis. The stronger fitness of NIL-rr compared with NIL-BB may be caused by the eye mutant gene or its closely linked genes having stronger compensation ability for reproduction. The comparable fitness of NIL-rr with BB indicated that NIL-rr may be used in field research. The NIL-BB strain with significantly declined fecundity and survival ability can be used as study model for the signal pathways relating to fecundity.

分类号: Q969.9

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