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A chimeric gene paternally instructs female sex determination in the haplodiploid wasp Nasonia
Science ( IF 56.9 ) Pub Date : 2020-11-26 , DOI: 10.1126/science.abb8949
Yuan Zou 1 , Elzemiek Geuverink 1 , Leo W. Beukeboom 1 , Eveline C. Verhulst 1, 2, 3 , Louis van de Zande 1
Affiliation  

Paternal factor specifies female wasps Not all animals have specialized sex chromosomes to determine their sex. In hymenopteran insects, for example, unfertilized eggs become males and fertilized eggs become females. Prior work showed that the paternal genome provides instruction for female development. Zou et al. identified a sex determination instructor gene, wasp overruler of masculinization, with parent-of-origin effect, in the parasitoid Nasonia vitripennis. It is only transcribed from the paternally provided genome in fertilized eggs to initiate female development. This discovery provides insights into the molecular basis and evolution of sex determination. Science, this issue p. 1115 A parent-of-origin gene determines wasp sex. Various primary signals direct insect sex determination. In hymenopteran insects, the presence of a paternal genome is needed to initiate female development. When absent, uniparental haploid males develop. We molecularly and functionally identified the instructor sex-determination gene, wasp overruler of masculinization (wom), of the haplodiploid wasp Nasonia vitripennis. This gene contains a P53-like domain coding region and arose by gene duplication and genomic rearrangements. Maternal silencing of wom results in male development of haploid embryos. Upon fertilization, early zygotic transcription from the paternal wom allele is initiated, followed by a timely zygotic expression of transformer (tra), leading to female development. Wom is an instructor gene with a parent-of-origin effect in sex determination.

中文翻译:

嵌合基因父本指导单倍二倍体黄蜂 Nasonia 的雌性性别决定

父系因素指定雌性黄蜂 并非所有动物都有专门的性染色体来确定它们的性别。例如,在膜翅目昆虫中,未受精的卵变成雄性,受精的卵变成雌性。先前的工作表明,父本基因组为女性发育提供指导。邹等人。在寄生蜂 Nasonia vitripennis 中发现了一个性别决定指导基因,男性化的黄蜂支配者,具有亲本效应。它仅从受精卵中父本提供的基因组转录,以启动雌性发育。这一发现提供了对性别决定的分子基础和进化的见解。科学,这个问题 p。1115 亲本基因决定黄蜂性别。各种主要信号直接决定昆虫的性别。在膜翅目昆虫中,需要父本基因组的存在来启动女性发育。当不存在时,单亲单倍体雄性发育。我们在分子和功能上鉴定了单倍二倍体黄蜂 Nasonia vitripennis 的指导者性别决定基因,即男性化(wom)的黄蜂超标基因。该基因包含一个 P53 样结构域编码区,由基因复制和基因组重排产生。母体沉默 wom 导致单倍体胚胎的男性发育。受精后,来自父本 wom 等位基因的早期合子转录被启动,随后是 Transformer (tra) 的适时合子表达,导致雌性发育。Wom 是一个指导基因,在性别决定中具有亲本效应。我们在分子和功能上鉴定了单倍二倍体黄蜂 Nasonia vitripennis 的指导者性别决定基因,即男性化(wom)的黄蜂超标基因。该基因包含一个 P53 样结构域编码区,由基因复制和基因组重排产生。母体沉默 wom 导致单倍体胚胎的男性发育。受精后,来自父本 wom 等位基因的早期合子转录被启动,随后是 Transformer (tra) 的适时合子表达,导致雌性发育。Wom 是一个指导基因,在性别决定中具有亲本效应。我们在分子和功能上鉴定了单倍二倍体黄蜂 Nasonia vitripennis 的指导者性别决定基因,即男性化(wom)的黄蜂超标基因。该基因包含一个 P53 样结构域编码区,由基因复制和基因组重排产生。母体沉默 wom 导致单倍体胚胎的男性发育。受精后,来自父本 wom 等位基因的早期合子转录被启动,随后是 Transformer (tra) 的适时合子表达,导致雌性发育。Wom 是一个指导基因,在性别决定中具有亲本效应。该基因包含一个 P53 样结构域编码区,由基因复制和基因组重排产生。母体沉默 wom 导致单倍体胚胎的男性发育。受精后,来自父本 wom 等位基因的早期合子转录被启动,随后是 Transformer (tra) 的适时合子表达,导致雌性发育。Wom 是一个指导基因,在性别决定中具有亲本效应。该基因包含一个 P53 样结构域编码区,由基因复制和基因组重排产生。母体沉默 wom 导致单倍体胚胎的男性发育。受精后,来自父本 wom 等位基因的早期合子转录被启动,随后是 Transformer (tra) 的适时合子表达,导致雌性发育。Wom 是一个指导基因,在性别决定中具有亲本效应。
更新日期:2020-11-26
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