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1 August 2015 A Comparative Study on the Population Fitness of Three Strains of Nilaparvata lugens (Hemiptera: Delphacidae) Differ in Eye Color-Related Genes
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Abstract

The brown planthopper, Nilaparvata lugens (Stål), 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.

© The Authors 2015. Published by Oxford University Press on behalf of Entomological Society of America.
Shuhua Liu, Baojun Yang, Ju Luo, Jian Tang, and Jincai Wu "A Comparative Study on the Population Fitness of Three Strains of Nilaparvata lugens (Hemiptera: Delphacidae) Differ in Eye Color-Related Genes," Journal of Economic Entomology 108(4), 1675-1682, (1 August 2015). https://doi.org/10.1093/jee/tov154
Received: 20 March 2015; Accepted: 19 May 2015; Published: 1 August 2015
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