Reproductive performance of the Antarctic tardigrades Acutuncus antarcticus (Eutardigrada: Hypsibiidae) revived after being frozen for over 30 years and of their offspring
Reproductive performance of the Antarctic tardigrades Acutuncus antarcticus (Eutardigrada: Hypsibiidae) revived after being frozen for over 30 years and of their offspring
复制标题
南极缓步动物 Acutuncus antarcticus（Eutardigrada：Hypsibiidae）在冰冻 30 多年后恢复其后代的繁殖能力
DOI：
10.1093/zoolinnean/zlz137
复制
发表时间：
2020
影响因子：
2.8
通讯作者：
Imura S
中科院分区：
文献类型：
--
作者：
Tsujimoto M;Kagoshima H;Kanda H;Watanabe K;Imura S
对动物长期生存的研究往往只关注动物生存的具体实例，而对随后的繁殖描述一般不予报道。本研究记录了南极缓步动物Acutuncus antarcticus复苏个体第一代后代(SB-1)和复苏卵(SB-3)在冷冻30.5年后的繁殖表现。通过对SB-1和SB-3复活后的繁殖情况进行更详细的描述，然后将其繁殖性能与其第一代后代进行比较，更具体地检测到SB-1和SB-3在长期保存过程中可能受到损害的迹象。此外，DNA 分析揭示了两种截然不同的线粒体基因序列。南极洲 SB 菌株和 LSW 菌株之间。观察到的两种遗传类型之间的一些生殖参数的差异表明，A物种的生活史特征和遗传类型之间可能存在关系。南极洲。使用长期饲养的 SB-1 和 SB-3 菌株进行进一步实验以排除保存的即时效应，预计将提高我们对动物长期生存机制的理解。
Studies on the long-term survival of animals often focus on the specific instance of survival of animals only, and descriptions of subsequent reproduction are generally not reported. In this study, we recorded the reproductive performance of the first-generation offspring of the resuscitated individual (SB-1) and the hatchling of the resuscitated egg (SB-3) of the Antarctic tardigrade,Acutuncus antarcticus, after being frozen for 30.5 years. By providing further detailed description of the reproduction of SB-1 and SB-3 after revival, and then comparing the reproductive performance with that of their first-generation offspring, the possible indications of the damage accrued during the long-term preservation in SB-1 and SB-3 were more specifically detected. Additionally, the DNA analysis revealed two distinctively different mitochondrial genetic sequences ofA. antarcticusbetween the SB strains and the LSW strain. The observed differences in some of the reproductive parameters between the two genetic types suggested a possible relationship between the life-history traits and genetic type in the speciesA. antarcticus. Further experiments using the SB-1 and SB-3 strains reared for a long period to exclude the instant effect of preservation are expected to improve our understanding of the mechanisms underlying the long-term survival of animals.