Synthetic apomixis enables stable transgenerational transmission of heterotic phenotypes in hybrid rice  

作　　者：Chaolei Liu Zexue He Yan Zhang Fengyue Hu Mengqi Li Qing Liu Yong Huang Jian Wang Wenli Zhang Chun Wang Kejian Wang 

机构地区：[1]State Key Laboratory of Rice Biology,China National Rice Research Institute,Hangzhou 310006,China [2]State Key Laboratory for Crop Genetics and Germplasm Enhancement,CIC-MCP,Nanjing Agriculture University,Nanjing,Jiangsu 210095,China [3]Hainan Yazhou Bay Seed Lab,Sanya,Hainan 572025,China

出　　处：《Plant Communications》2023年第2期227-235,共9页植物通讯（英文）

基　　金：supported by the National Natural Science Foundation of China(U20A2030,32025028,and 32188102);the Central Public-interest Scientific Institution Basal Research Fund(Y2022QC20);the Hainan Yazhou Bay Seed Laboratory(#B21HJ0215);the Agricultural Science and Technology Innovation Program of the Chinese Academy of Agricultural Sciences(CAAS-ZDRW202001).

摘　　要：In hybrid plants,heterosis often produces large,vigorous plants with high yields;however,hybrid seeds are generated by costly and laborious crosses of inbred parents.Apomixis,in which a plant produces a clone of itself via asexual reproduction through seeds,may produce another revolution in plant biology.Recently,synthetic apomixis enabled clonal reproduction of F_(1) hybrids through seeds in rice(Oryza sativa),but the inheritance of the synthetic apomixis trait and superior heterotic phenotypes across generations remained unclear.Here,we propagated clonal plants to the T_(4) generation and investigated their genetic and molecular stability at each generation.By analyzing agronomic traits,as well as the genome,methylome,transcriptome,and allele-specific transcriptome,we showed that the descendant clonal plants remained stable.Unexpectedly,in addition to normal clonal seeds,the plants also produced a few aneuploids that had eliminated large genomic segments in each generation.Despite the identification of rare aneuploids,the observation that the synthetic apomixis trait is stably transmitted through multiple generations helps confirm the feasibility of using apomixis in the future.

关 键 词：synthetic apomixis hybrid rice transgenerational heredity stability 

分 类 号：S511[农业科学—作物学]