雄性偏向的性比对黑肩绿盲蝽生殖力和子代生长发育的影响  

Effects of male-biased sex ratios on the reproduction and offspring development of the predatory mirid bug,Cyrtorhinus lividipennis(Hemiptera:Miridae)

作　　者：徐一洁 王影 刘芳[1] 胡奎 XU Yi-Jie;WANG Ying;LIU Fang;HU Kui(College of Plant Protection,Yangzhou University,Yangzhou 225009,China)

机构地区：[1]扬州大学植物保护学院,扬州225009

出　　处：《应用昆虫学报》2024年第5期995-1001,共7页Chinese Journal of Applied Entomology

基　　金：国家自然科学基金项目(32001894,31872928)。

摘　　要：【目的】明确雄性偏向的性比对黑肩绿盲蝽Cyrtorhinus lividipennis生殖力和子代生长发育的影响,促进黑肩绿盲蝽的规模化饲养和应用。【方法】在室内条件下,测定雌雄性比分别为1:1、1:2和1:3时,黑肩绿盲蝽雌虫的产卵前期、产卵量和产卵历期,以及子代卵孵化率、若虫历期、羽化率、性比和成虫寿命等参数。【结果】不同性比对黑肩绿盲蝽亲代产卵前期(F=1.239,df=2,57,P=0.2973)及子代卵孵化率(F=1.883,df=2,57,P=0.1615)、成虫羽化率(F=0.047,df=2,12,P=0.9541)和性比(F=0.815,df=2,12,P=0.4659)无显著影响。雌雄性比为1:3时,平均每头雌虫产卵量[(137.15±32.29)粒]较性比1:1处理[(115.65±30.49)粒]显著增加18.59%(LSD=2.350,df=57,P=0.0222);性比为1:2和1:3时,子代若虫发育历期分别为(11.25±1.65)和(11.11±1.13)d,较雌雄性比1:1处理[(10.06±1.21)d]显著提高1.18(LSD=3.518,df=97,P=0.0007)和1.05d(LSD=3.205,df=97,P=0.0018)。此外,性比1:2处理[雌虫(18.80±2.11)d,雄虫(17.41±4.12)d]较1:1处理[雌虫(15.28±3.29)d,雄虫(14.77±3.14)d]子代的雌虫和雄虫寿命分别显著延长3.52(LSD=2.980,df=45,P=0.0046)和2.64d(LSD=2.061,df=49,P=0.0446)。【结论】雄性偏向的性比有利于促进黑肩绿盲蝽的生殖力和子代的生长发育。[Aim]To clarify the effects of a male-biased sex ratio on the fecundity and development of offspring of the predatory mirid bug Cyrtorhinus lividipennis,and to promote the large-scale breeding of this species as a biological control for rice planthoppers and rice leafhoppers.[Methods]We conducted an experiment to examine the effects of a male-biased parental sex ratio(female:male ratios of 1∶1,1∶2,and 1∶3)on various reproductive parameters,including pre-oviposition period,fecundity(eggs laid per female),oviposition duration,as well as egg hatchability,nymph developmental duration,emergence rate,sex ratio and adult lifespan,of offspring.[Results]The pre-oviposition period(F=1.239,df=2,57,P=0.2973),egg hatchability(F=1.883,df=2,57,P=0.1615),offspring emergence rate(F=0.047,df=2,12,P=0.9541)and sex ratio(F=0.815,df=2,12,P=0.4659)were not significantly affected by the parental sex ratio.However,compared to the control population[1∶1 sex ratio,(115.65±30.49)grain/female],the fecundity of a population with a 1∶3 sex ratio was significantly higher[(137.15±32.29)grain/female;18.59%](LSD=2.350,df=57,P=0.0222).Nymphs from populations with sex ratios of 1∶2[(11.25±1.65)d]and 1∶3[(11.11±1.13)d]had prolonged developmental durations of 1.18(LSD=3.518,df=97,P=0.0007)and 1.05 d(LSD=3.205,df=97,P=0.0018),respectively.Furthermore,the lifespan of the offspring of a population with a 1∶2 sex ratio was 3.52 d(LSD=2.980,df=45,P=0.0046)longer for female adults[(18.80±2.11)d]and 2.64 d(LSD=2.061,df=49,P=0.0446)longer for male adults[(17.41±4.12)d]compared to the control population[female:(15.28±3.29)d,male:(14.77±3.14)d].[Conclusion]These results indicate that a male-biased sex ratio has positive effects on the fertility and offspring development of C.lividipennis.

关 键 词：黑肩绿盲蝽 性比 生殖力 子代生长发育 

分 类 号：S476.2[农业科学—农业昆虫与害虫防治]