樟叶蜂,孤雌生殖,两性生殖,生殖适合度,发育历期,性比," /> 樟叶蜂,孤雌生殖,两性生殖,生殖适合度,发育历期,性比,"/> <span>Comparison of female reproductive fitness and offspring life history traits between gamogenesis and parthenogenesis in the camphor sawfly, <i>Mesoneura rufonota</i> (Hymenoptera: Tenthredinidae)</span>

Acta Entomologica Sinica ›› 2018, Vol. 61 ›› Issue (12): 1421-1429.doi: 10.16380/j.kcxb.2018.12.007

• RESEARCH PAPERS • Previous Articles     Next Articles

Comparison of female reproductive fitness and offspring life history traits between gamogenesis and parthenogenesis in the camphor sawfly, Mesoneura rufonota (Hymenoptera: Tenthredinidae)

XU Chuan-Feng1,2, SHI Hao-Ni1,2, YIN Li-Xin2,3, ZHOU Jia-Ying1,2, LIU Xing-Ping1,2,*   

  1.  (1. 2011 Collaborative Innovation Center of Jiangxi Typical Trees Cultivation and Utilization, College of Forestry, Jiangxi Agricultural University, Nanchang 330045, China; 2. Key Laboratory of State Forestry Administration on Forest Ecosystem Protection and Restoration of Poyang Lake Watershed (JXAU), Nanchang 330045, China; 3. Forestry Bureau of Wanli District,Nanchang330004,China)
  • Online:2018-12-20 Published:2019-01-22

Abstract: Aim The camphor sawfly, Mesoneura rufonota, is an important defoliator of the camphor tree Cinnamonum campora. The reproduction strategy of this insect includes gamogenesis and parthenogenesis. This study aims to clarify the biological significance of parthenogenesis in the life history of the camphor sawfly. Methods The differences in female reproductive fitness of M. rufonota including female adult longevity, fecundity and egg hatching rate and offspring life history traits including the duration of various developmental stages, mortality, sex ratio and fecundity of offspring between parthenogenesis and gamogenesis at the constant temperature of25were determined and analyzed. Results The female adult longevity of M. rufonota was longer for parthenogenesis than for gamogenesis, while the fecundity and egg hatching rate were similar between the two reproduction modes. There were no differences in the duration and mortality of various developmental stages and the fecundity of female offspring between parthenogenesis and gamogenesis. However, significant difference was found in the sex ratio of the offspring between parthenogenesis and gamogenesis, being displayed by that parthenogenesis resulted in male-biased sex ratio, while gamogenesis resulted in female-biased sex ratio. Conclusion The parthenogenesis of the camphor sawfly prolongs the longevity of female adult, which has been confirmed as arrhenotoky. These results showed that parthenogenesis of the camphor sawfly not only makes it possible to establish population, but also can provide a large number of males to offset the insufficient male individuals in gamogenesis.

Key words: Mesoneura rufonota, parthenogenesis, gamogenesis, reproductive fitness, developmental duration, sex ratio