首页|Genomic dissection of widely planted soybean cultivars leads to a new breeding strategy of crops in the post-genomic era

Genomic dissection of widely planted soybean cultivars leads to a new breeding strategy of crops in the post-genomic era

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Soybeans specially the widely planted cultivars have been dramatically improved in agronomic perfor-mance and is well adapted to local planting environments after long-time domestication and breeding.Uncovering the unique genomic features of popular cultivars will help to understand how soybean gen-omes have been modified through breeding.We re-sequenced 134 soybean cultivars that were released and most widely planted over the last century in China.Phylogenetic analyses established that these cul-tivars comprise two geographically distinct sub-populations:Northeast China (NE) versus the Huang-Huai-Hai River Valley and South China (HS).A total of 309 selective regions were identified as being impacted by geographical origins.The HS sub-population exhibited higher genetic diversity and linkage disequilibrium decayed more rapidly compared to the NE sub-population.To study the association between phenotypic differences and geographical origins,we recorded the vegetative period under dif-ferent growing conditions for two years,and found that clustering based on the phenotypic data was clo-sely correlated with cultivar geographical origin.By iteratively calculating accumulated genetic diversity,we established a platform panel of cultivars and have proposed a novel breeding strategy named"Potalaization" for selecting and utilizing the platform cultivars that represent the most genetically diver-sity and the highest available agronomic performance as the "plateau" for accumulating elite loci and traits,breeding novel widely adapted cultivars,and upgrading breeding technology.In addition to provid-ing new genomic information for the soybean research community,the "Potalaization" strategy that we devised will also be practical for integrating the conventional and molecular breeding programs of crops in the post-genomic era.

SoybeanWidely planted cultivarsGenomic re-sequencingBreeding strategy

Xinpeng Qi、Bingjun Jiang、Tingting Wu、Shi Sun、Caijie Wang、Wenwen Song、Cunxiang Wu、Wensheng Hou、Qijian Song、Hon-Ming Lam、Tianfu Han

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MARA Key Laboratory of Soybean Biology (Beijing),Institute of Crop Sciences,Chinese Academy of Agricultural Sciences,Beijing 100081,China

Centre for Soybean Research of the State Key Laboratory of Agrobiotechnology and School of Life Sciences,The Chinese University of Hong Kong,Shatin,Hong Kong,China

Soybean Genomics and Improvement Lab,USDA-ARS,Beltsville,MD 20705,USA

2017YFD0101400

2021

作物学报(英文版)

作物学报(英文版)

SCI
ISSN：
年,卷(期)：2021.9(5)
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