Horizontally-transferred T-DNA and haplotype-based phylogenetic analysis uncovers the origin of sweetpotato-Reference-Cited by-同舟云学术

Horizontally-transferred T-DNA and haplotype-based phylogenetic analysis uncovers the origin of sweetpotato

Published:2022-12-20 Issue: Volume: Page:
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Author:

Yan Mengxiao¹,Li Ming,Wang Yunze¹,Wang Xinyi¹,Moeinzadeh M-Hossein²,Quispe-Huamanquispe Dora³,Fan Weijuan¹,Wang Yuqin¹,Nie Haozhen⁴,Wang Zhangying⁵,Heider Bettina⁶^ORCID,Jarret Robert⁷,Kreuze Jan⁶^ORCID,Gheysen Godelieve⁸^ORCID,Wang Hongxia⁹,Vingron Martin¹⁰^ORCID,Bock Ralph¹¹^ORCID,Yang Jun⁹

Affiliation:

1. Shanghai Chenshan Botanical Garden

2. Department of Computational Molecular Biology, Max Planck Institute for Molecular Genetics

3. Department of Biotechnology, Ghent University

4. Shanghai Key Laboratory of Plant Functional Genomics and Resources, Shanghai Chenshan Botanical Garden

5. Guangdong Provincial Key Laboratory of Crops Genetics and Improvement, Crops Research Institute, Guangdong Academy of Agricultural Sciences

6. International Potato Center

7. USDA-ARS/PGRU

8. Ghent University

9. CAS Center for Excellence in Molecular Plant Sciences

10. Max Planck Institute for Molecular Genetics

11. Max Planck Institute of Molecular Plant Physiology

Abstract

Abstract The hexaploid sweetpotato is one of the most important root crops worldwide. However, its genetic origins remain controversial. In this study, we identified two likely progenitors of sweetpotato by analyzing the horizontally transferred IbT-DNA and a haplotype-based phylogenetic analysis. The diploid form of I. aequatoriensis contributed the B1 subgenome, the IbT-DNA2 and the lineage 2 type of the chloroplast genome to sweetpotato. The tetraploid progenitor of sweetpotato is I. batatas 4x, donating the B2 subgenome, IbT-DNA1 and the lineage 1 type of chloroplast genome. Sweetpotato is derived from reciprocal crosses between the diploid and the tetraploid progenitor, and a subsequent whole genome duplication. We also detected biased gene exchanges between subgenomes. The B1 to B2 subgenome conversions were almost 3-fold higher than the B2 to B1 subgenome conversions. This study sheds lights on the evolution of sweetpotato and paves the way for the improvement of the crop.

Publisher

Research Square Platform LLC

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