A recent retrotransposon insertion of J caused E6 locus facilitating soybean adaptation into low latitude  

作　　者：Chao Fang Jun Liu Ting Zhang Tong Su Shichen Li Qun Cheng Lingping Kong Xiaoming Li Tiantian Bu Haiyang Li Lidong Dong Sijia Lu Fanjiang Kong Baohui Liu 

机构地区：[1]Innovative Center of Molecular Genetics and Evolution,School of Life Sciences,Guangzhou University,Guangzhou 510006,China [2]The Innovative Academy of Seed Design,Key Laboratory of Soybean Molecular Design Breeding,Northeast Institute of Geography and Agroecology,the Chinese Academy of Sciences,Harbin 150000,China [3]Key Laboratory of South China Agricultural Plant Molecular Analysis and Genetic Improvement,South China Botanical Garden,the Chinese Academy of Sciences,Guangzhou 510650,China [4]National Key Laboratory of Crop Genetics and Germplasm Enhancement,Jiangsu Collaborative Innovation Center for Modern Crop Production,Nanjing Agricultural University,Nanjing 210095,China

出　　处：《Journal of Integrative Plant Biology》2021年第6期995-1003,共9页植物学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(31725021);funded by the Major Program of Guangdong Basic and Applied Research(2019B030302006)。

摘　　要：Soybean(Glycine max) is an important legume crop that was domesticated in temperate regions.Soybean varieties from these regions generally mature early and exhibit extremely low yield when grown under inductive short-day(SD) conditions at low latitudes. The long-juvenile(LJ) trait, which is characterized by delayed flowering and maturity,and improved yield under SD conditions, allowed the cultivation of soybean to expand to lower latitudes. Two major loci control the LJ trait: J and E6. In the current study, positional cloning, sequence analysis, and transgenic complementation confirmed that E6 is a novel allele of J, the ortholog of Arabidopsis thaliana EARLY FLOWERING 3(ELF3). The mutant allele e6^(PG), which carries a Ty1/Copia-like retrotransposon insertion, does not suppress the legume-specific flowering repressor E1, allowing E1 to inhibit Flowering Locus T(FT) expression and thus delaying flowering and increasing yields under SD conditions. The e6^(PG)allele is a rare allele that has not been incorporated into modern breeding programs.The dysfunction of J might have greatly facilitated the adaptation of soybean to low latitudes. Our findings increase our understanding of the molecular mechanisms underlying the LJ trait and provide valuable resources for soybean breeding.

关 键 词：E6 long-juvenile(LJ)trait J Ty1/copia-like retrotransposon 

分 类 号：S565.1[农业科学—作物学]