报告题目：Epigenetic control of transposon activity and dosage in pollen and hybrid seeds

报告嘉宾：Filipe Borges 博士

报告嘉宾简介：

Filipe Borge博士，法国国家农业食品与环境研究院（INRAE）课题组长。2012年葡萄牙里斯本大学博士，2012-2018年美国冷泉港实验室博士后、研究人员，2018年起在法国INRAE建立研究组，主要关注植物有性生殖过程中的表观遗传调控机制。研究成果在Cell、Nature Genetics、Nature communications、Plant Cell等杂志发表。

In flowering plants, crosses between parents with differing chromosome numbers often fail to develop viable seeds because of unbalanced expression of imprinted genes in the endosperm. This post-zygotic hybridization barrier is known as the "triploid block" response, and has been regarded as a major path towards reproductive isolation and polyploid speciation. However, the natural forces defining its strength and evolutionary impact in wild populations have not been fully investigated. Previous results have shown that plants use DNA methylation and transposon-derived small RNA to sense parental genome dosage in the endosperm of hybrid seeds. The paternal epigenome is a key component of this process, as loss of DNA methylation and small-interfering RNAs in diploid pollen allows bypassing the triploid block almost completely. In this seminar I will present our current efforts to identify the origins and dynamics of reproductive small RNAs responsible for hybrid seed collapse, as well as their targets.

报告时间：2024年10月23日（星期三） 上午 10 : 00 — 12 : 00

报告地点：滨江校区园艺楼142报告厅

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