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中华稻蝗的胚胎发育及卵滞育发生的胚胎发育阶段
Embryonic development and the stages of diapause incidence in the Chinese rice grasshopper, Oxya chinensis
崔双双1,朱道弘1,2**
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DOI:
作者单位:1中南林业科技大学昆虫行为与进化生态学实验室长沙410004;2湖南第一师范学院动物学实验室长沙410205
中文关键词:卵滞育, 胚胎发育, 含水量, 中华稻蝗
英文关键词:egg diapause, embryonic development, water content, Oxya chinensis
中文摘要:
        为弄清中华稻蝗Oxya chinensis(Thunberg)卵滞育发生的胚胎发育阶段,观察了其胚胎发育过程,检测了中华稻蝗铁岭、济南、长沙及儋州种群产卵后卵粒含水量的变化规律和胚胎发育的停滞时期。根据胚胎形态,自原头与原颚胸折叠的胚胎发育阶段开始,将中华稻蝗的胚胎发育过程划分为11个阶段。在25℃的温度条件下,4个地理种群的卵粒均有一快速的吸水过程,但完全滞育的铁岭和济南种群在产卵12 d后,含水量即无明显的增加,进入胚胎发育的停滞期。铁岭、长沙和儋州种群的卵滞育发生在胚胎发育的第Ⅶ阶段,济南种群卵滞育发生在胚胎发育的第Ⅵ~Ⅶ阶段。中华稻蝗长沙种群为1年2代和1年1代混合发生,10月上旬至11月下旬为第2代成虫的产卵期。自然条件下,长沙种群10月所产卵块发育至胚胎发育的第Ⅶ阶段,以滞育状态的卵越冬;但11月所产卵块越冬时胚胎尚未发育至滞育阶段,以胚胎发育第Ⅱ~Ⅴ阶段的卵越冬,越冬期间胚胎虽然发育缓慢,但并未完全停滞。
 
英文摘要:
To understand the embryonic stage of diapause incidence, the embryonic development was observed, the changing regularity of egg water contents after deposited and the stagnation stages of embryonic development were examined in Tieling, Jinan, Changsha and Danzhou population of Oxya chinensis(Thunberg). According to the embryonic morphology, from the phase which protocephalon of embryo fold with the other parts, the process of embrynic development was divided into 11 stages. The eggs of 4 geographical populations had a process of rapid water absorption at 25. However, the water contents of eggs showed no significant increasing and embryonic development was slow in the Tieling and Jinan population after day 12 of egg deposited. The time of egg diapause incidence was in the 7th stage of embryonic development in the Tieling, Changsha and Danzhou populations, but was in stage 6 to stage 7 in the Jinan population. The Changsha population of O. chinensis shows a uni-bivoltine mixed life cycles, and adults of the second generation oviposited from early October to late November. In the field, the eggs laid in October developed to the 7th stage of embryonic development at 15 December and overwintered with diapause status, but the eggs laid in November did not finish the pre-diapause development, and overwintered as eggs with the 2th to 5th stage of embryonic development. The emberyos developed slowly, but did not stop in the Changsha population of O. chinensis in the winter.
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