Silence of the killers: discovery of male-killing suppression in a rearing strain of the small brown planthopper, Laodelphax striatellus
Silence of the killers: discovery of male-killing suppression in a rearing strain of the small brown planthopper, Laodelphax striatellus
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杀手的沉默：在灰飞虱饲养品系中发现雄性致死抑制作用
DOI：
10.1098/rspb.2020.2125
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发表时间：
2021
期刊：
影响因子：
--
通讯作者：
Tokuda Makoto
中科院分区：
文献类型：
--
作者：
Yoshida Kazuki;Sanada-Morimura Sachiyo;Huang Shou-Horng;Tokuda Makoto
根据进化理论，由沃尔巴克氏体和螺旋体等生殖寄生虫引起的性别比例扭曲预计会因宿主核抑制因子的出现而迅速正常化。然而，进化军备竞赛中的这种过程很难观察到，因为性别比例偏差会很快被隐藏起来，变得表面上无法识别。到目前为止，只有两种昆虫报道了遗传抑制基因的进化。在灰飞虱（Laodelphaxstriatellus）的某些种群中发现了由螺旋体（Spiroplasma）引起的雌性偏好。在连续饲养的过程中，L.在Striatellus中，我们注意到饲养菌株具有1：1的性比，即使它携带螺原体。通过与缺乏抑制子的菌株进行渐渗杂交实验，我们发现L. striatellusstrain具有合子杀雄抑制基因作为显性性状。尽管螺旋体保留了杀雄能力，但杀雄表型被抑制子隐藏。这是第一个研究证明存在一个晚期男性杀伤抑制基因及其遗传模式。我们的研究结果，与以前的研究结果一起，表明，无论昆虫的顺序或早期或晚期的男性杀害，男性杀死抑制基因的遗传模式是相似的。
According to evolutionary theory, sex ratio distortions caused by reproductive parasites such asWolbachiaandSpiroplasmaare predicted to be rapidly normalized by the emergence of host nuclear suppressors. However, such processes in the evolutionary arms race are difficult to observe because sex ratio biases will be promptly hidden and become superficially unrecognizable. The evolution of genetic suppressors has been reported in just two insect species so far. In the small brown planthopper,Laodelphax striatellus, female-biases caused bySpiroplasma, which is a ‘late’ male-killer, have been found in some populations. During the continuous rearing ofL. striatellus, we noted that a rearing strain had a 1 : 1 sex ratio even though it harbouredSpiroplasma. Through introgression crossing experiments with a strain lacking suppressors, we revealed that theL. striatellusstrain had the zygotic male-killing suppressor acting as a dominant trait. The male-killing phenotype was hidden by the suppressor even thoughSpiroplasmaretained its male-killing ability. This is the first study to demonstrate the existence of a late male-killing suppressor and its mode of inheritance. Our results, together with those of previous studies, suggest that the inheritance modes of male-killing suppressors are similar regardless of insect order or early or late male killing.
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昆虫共生，第 2 卷
DOI：
--
发表时间：
2006
期刊：
影响因子：
--
作者：
K. Bourtzis;T. Miller
通讯作者：
T. Miller
影响因子：
3.3
作者：
Jaenike, John
通讯作者：
Jaenike, John
影响因子：
7.2
作者：
Hurst, Gregory D. D.;Frost, Crystal L.
通讯作者：
Frost, Crystal L.
影响因子：
3.1
作者：
H. Noda
通讯作者：
H. Noda
影响因子：
64.8
作者：
Harumoto T;Lemaitre B
通讯作者：
Lemaitre B