Genome Editing Enables Next-Generation Hybrid Seed Production Technology

来源 :分子植物(英文版) | 被引量 : 0次 | 上传用户:jayzhoujian
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
The next-generation hybrid seed technology enables the successful production of sortable hybrid seeds from genic male sterile (GMS) lines and maintainers;however,it requires multiple laborious and complicated steps.Here,we designed a simple next-generation hybrid seed production strategy that takes advantage ofthe CRISPR/Cas9 technology to create a Manipulated GMS Maintainer (MGM) system via a single transformation.Under this schema,the maize male fertility gene ZmMS26 was nullified by removal of its fifth exon using the CRISPR/Cas9 system on a vector,and a second vector carrying a functional ZmMS26 cDNA was co-transformed to restore fertility.The second vector also contains a male gametophyte inactivation gene (ZmAA1) encoding maize α-amylase driven by the pollen-specific promoter PG47 and an endosperm fluorescent marker (DsRED) driven by the barley endosperm aleurone-specific promoter Ltp2.The derived single-copy hemizygous MGM lines bore a mutatedMS26 gene,leading to complete male sterility but normal vegetative growth and grain yield.The MGM system could prevent genetic transmission of the MGM elements via male gametophytes,providing an efficient method for sorting maintainerseeds labeled by DsRED.This strategy can be extended to any GMS gene and to hybrid crops other than maize.
其他文献
Chromoplasts are colored plastids that synthesize and store massive amounts of carotenoids.Chromoplast number and size define the sink strength for carotenoid a
长期以来,我国土地资源一直处于粗放式的管理状态,与此同时,伴随着我国城镇化的不断推进,建设用地的需求量不断增加,这也加剧了农用地危机,农用地的科学管理和有效监管变得尤为重要
农作物秸秆是农作物生产系统中一项重要的生物资源。通过对平昌县秸秆资源情况及利用现状的问卷调查发现,平昌县每年产生大量农作物秸秆资源,但大部分农作物秸秆被丢弃田间、