Structural variation of mitochondrial genomes sheds light on evolutionary history of soybeans
文献类型: 外文期刊
作者: Liu, Hao 1 ; Yu, Junping 1 ; Yu, Xiaoxia 1 ; Zhang, Dan 1 ; Chang, Han 1 ; Li, Wei 1 ; Song, Haifeng 1 ; Cui, Zheng 1 ; Wang, Peng 1 ; Luo, Yixin 1 ; Wang, Fei 1 ; Wang, Dagang 2 ; Li, Zhi 3 ; Huang, Zhiping 2 ; Fu, Aigen 1 ; Xu, Min 1 ;
作者机构: 1.Northwest Univ, Coll Life Sci, Chinese Educ Minist,Key Lab Biotechnol Shaanxi Pr, Key Lab Western Resources & Modern Biotechnol, Xian 710069, Shaanxi, Peoples R China
2.Anhui Acad Agr Sci, Crop Res Inst, Key Lab Crop Qual Improvement Anhui Prov, Hefei 230031, Anhui, Peoples R China
3.Fuyang Acad Agr Sci, Fuyang 236000, Anhui, Peoples R China
关键词: Glycine max; Williams 82; mitochondrial genome; de novo assembly; bi-chromosomal configuration; structural variations; cytoplasmic origin; domestication
期刊名称:PLANT JOURNAL ( 影响因子:6.486; 五年影响因子:7.666 )
ISSN: 0960-7412
年卷期: 2021 年 108 卷 5 期
页码:
收录情况: SCI
摘要: The architecture and genetic diversity of mitogenome (mtDNA) are largely unknown in cultivated soybean (Glycine max), which is domesticated from the wild progenitor, Glycine soja, 5000 years ago. Here, we de novo assembled the mitogenome of the cultivar 'Williams 82' (Wm82_mtDNA) with Illumina PE300 deep sequencing data, and verified it with polymerase chain reaction (PCR) and Southern blot analyses. Wm82_mtDNA maps as two autonomous circular chromosomes (370 871-bp Chr-m1 and 62 661-bp Chr-m2). Its structure is extensively divergent from that of the mono-chromosomal mitogenome reported in the landrace 'Aiganhuang' (AGH_mtDNA). Synteny analysis showed that the structural variations (SVs) between two genomes are mainly attributed to ectopic and illegitimate recombination. Moreover, Wm82_mtDNA and AGH_mtDNA each possess six and four specific regions, which are absent in their counterparts and likely result from differential sequence-loss events. Mitogenome SV was further studied in 39 wild and 182 cultivated soybean accessions distributed world-widely with PCR/Southern analyses or a comparable in silico analysis. The results classified both wild and cultivated soybeans into five cytoplasmic groups, named as GSa-GSe and G1-G5; 'Williams 82' and 'Aiganhuang' belong to G1 and G5, respectively. Notably, except for members in GSe and G5, all accessions carry a bi-chromosomal mitogenome with a common Chr-m2. Phylogenetic analyses based on mtDNA structures and chloroplast gene sequences both inferred that G1-G3, representing >90% of cultigens, likely inherited cytoplasm from the ancestor of domestic soybean, while G4 and G5 likely inherited cytoplasm from wild soybeans carrying GSa- and GSe-like cytoplasm through interspecific hybridization, offering new insights into soybean cultivation history.
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