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Effects of intraspecific hybridisation between the northern and the southern populations of the cabbage beetle, Colaphellus bowringi on life-history traits

Published online by Cambridge University Press:  08 January 2025

Hai-Min He
Affiliation:
Institute of Entomology, Jiangxi Agricultural University, Nanchang 330045, China
Li-Li Huang*
Affiliation:
College of Ecology and Environment, YuZhang Normal University, Nanchang 330103, China
Shao-Hui Wu
Affiliation:
Department of Entomology, The Ohio State University, Columbus, OH 43210, USA
Jian-Jun Tang
Affiliation:
College of Computer and Information Engineering, Jiangxi Agricultural University, Nanchang 330045, China
Fang-Sen Xue*
Affiliation:
Institute of Entomology, Jiangxi Agricultural University, Nanchang 330045, China
*
Corresponding author: Li-Li Huang; Email: 121120328@qq.com; Fang-Sen Xue; Email: xue_fangsen@hotmail.com
Corresponding author: Li-Li Huang; Email: 121120328@qq.com; Fang-Sen Xue; Email: xue_fangsen@hotmail.com

Abstract

Significant differences in life-history traits between the southern population (S) and northern (N) population of the cabbage beetle Colaphellus bowringi make it an excellent model for studying inheritance in this insect. In the present study, we observed the life-history traits of pure strains, F1, reciprocal backcross and reciprocal F2 progeny under a photoperiod of L:D 15:9 h at 22 °C. The S population had shorter larval development time, longer pupal time, higher body weight, growth rate and weight loss compared with the N population. In the F1 testing, the larval development time and body weight in hybrid populations were intermediate between the parents, and the paternal parents played a greater role in determining the larval development time, while the maternal parents exhibited a greater role in determining the body weight. The pupal time of hybrid populations was significantly shorter than that of the parents. In the reciprocal backcross testing, both father and grandfather affected the larval development time, while both mother and grandmother affected the body weight. Consistently, in the reciprocal F2 cross testing, the grandfather was more influential in determining the larval development time, and grandmother was more important in determining the body weight. In all tested populations, females had greater body weight, higher growth rate and weight loss than males. Hybridization pattern did not affect sex dimorphism and sex ratio. Overall, these findings suggest that different pathways (maternal or paternal effects) were involved in the inheritance of various life-history traits in C. bowringi.

Information

Type
Research Paper
Copyright
© The Author(s), 2025. Published by Cambridge University Press

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