Sequencing of Chinese castor lines reveals genetic signatures of selection and yield-associated loci

Wei Fan, Jianjun Lu, Cheng Pan, Meilian Tan, Qiang Lin, Wanfei Liu, Donghai Li, Lijun Wang, Lianlian Hu, Lei Wang, Chen Chen, Aimin Wu, Xinxin Yu, Jue Ruan, Jun Yu, Songnian Hu, Xingchu Yan (), Shiyou Lü () and Peng Cui ()
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Wei Fan: Chinese Academy of Agricultural Sciences
Jianjun Lu: Chinese Academy of Sciences
Cheng Pan: Chinese Academy of Sciences
Meilian Tan: Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences
Qiang Lin: Chinese Academy of Agricultural Sciences
Wanfei Liu: Chinese Academy of Sciences
Donghai Li: Chinese Academy of Sciences
Lijun Wang: Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences
Lianlian Hu: Chinese Academy of Sciences
Lei Wang: Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences
Chen Chen: South China Agricultural University
Aimin Wu: South China Agricultural University
Xinxin Yu: Chinese Academy of Agricultural Sciences
Jue Ruan: Chinese Academy of Agricultural Sciences
Jun Yu: Chinese Academy of Sciences
Songnian Hu: Chinese Academy of Sciences
Xingchu Yan: Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences
Shiyou Lü: Hubei University
Peng Cui: Chinese Academy of Agricultural Sciences

Nature Communications, 2019, vol. 10, issue 1, 1-11

Abstract: Abstract Oil produced by castor (Ricinus communis) has broad industrial applications. However, knowledge on the genetic diversity, especially genetic alterations that occurred during domestication and subsequent traits selection, of this oil crop is limited. Here, our population genomics analyses show that the Chinese castors have developed a geographic pattern, classified into the southern-, the middle-, and the northern-China groups. We detect a number of candidate genomic loci that are associated with the selection signals during the geographical differentiation and domestication. Using genome-wide association analysis, we identify candidate genes associated with nine agronomically important traits. One of the candidate genes encoding a glycosyltransferase related to cellulose and lignin biosynthesis is associated with both capsule dehiscence and endocarp thickness. We hypothesize that the abundance of cellulose or lignin in endocarp is an important factor for capsule dehiscence. Our results provide foundation for castor breeding and genetic study.

Date: 2019
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DOI: 10.1038/s41467-019-11228-3

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