Inheritance of Acquired Traits in Insects and Other Animals and the Epigenetic Mechanisms That Break the Weismann Barrier

被引:9
作者
Gowri, V. [1 ]
Monteiro, Antonia [1 ,2 ]
机构
[1] Natl Univ Singapore, Dept Biol Sci, Singapore 117543, Singapore
[2] Yale NUS Coll, Sci Div, Singapore 138609, Singapore
关键词
Weismann barrier; inheritance of acquired traits; transgenerational epigenetic inheritance; epigenetics; genetic assimilation; insects; TRANSGENERATIONAL INHERITANCE; GENETIC ASSIMILATION; DNA METHYLATION; NONCODING RNAS; BEHAVIOR; PLASTICITY; EVOLUTION; PREDATION; DISEASE;
D O I
10.3390/jdb9040041
中图分类号
Q [生物科学];
学科分类号
07 ; 0710 ; 09 ;
摘要
The credibility of the Weismann barrier has come into question. Several studies in various animal systems, from mice to worms, have shown that novel environmental stimuli can generate an altered developmental or behavioral trait that can be transmitted to offspring of the following generation. Recently, insects have become ideal models to study the inheritance of acquired traits. This is because insects can be reared in high numbers at low cost, they have short generation times and produce abundant offspring. Numerous studies have shown that an insect can modify its phenotype in response to a novel stimulus to aid its survival, and also that this modified phenotypic trait can be inherited by its offspring. Epigenetic mechanisms are likely at play but, most studies do not address the mechanisms that underlie the inheritance of acquired traits in insects. Here we first review general epigenetic mechanisms such as DNA methylation, histone acetylation and small noncoding RNAs that have been implicated in the transmission of acquired traits in animals, then we focus on the few insect studies in which these mechanisms have been investigated.
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页数:9
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