Open AccessResequencing of 301 ramie accessions identifies genetic loci and breeding selection for fibre yield traits
Author(s) -
Zeng Zheng,
Zhu Siyuan,
Wang Yanzhou,
Bai Xuehua,
Liu Chan,
Chen Jianrong,
Zhang Ting,
Wei Yiping,
Li Fu,
Bao Zhigui,
Yan Li,
Wang Hengyun,
Liu Touming
Publication year - 2022
Publication title -
plant biotechnology journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.525
H-Index - 115
eISSN - 1467-7652
pISSN - 1467-7644
DOI - 10.1111/pbi.13714
Subject(s) - biology , ramie , selection (genetic algorithm) , quantitative trait locus , genomics , candidate gene , genetic variation , gene , genetic diversity , crop , genetics , microbiology and biotechnology , genome , agronomy , population , fiber , computer science , chemistry , demography , organic chemistry , artificial intelligence , sociology
Summary Ramie is an important fibre‐producing crop in China; however, the genetic basis of its agronomic traits remains poorly understood. We produced a comprehensive map of genomic variation in ramie based on resequencing of 301 landraces and cultivars. Genetic analysis produced 129 signals significantly associated with six fibre yield‐related traits, and several genes were identified as candidate genes for respective traits. Furthermore, we found that natural variations in the promoter region of Bnt14G019616 were associated with extremely low fibre abundance, providing the first evidence for the role of pectin methylesterase in fibre growth of plants. Additionally, nucleotide diversity analysis revealed that breeding selection has been markedly focussed on chromosome 9 in which ~ 39.6% sequence underwent selection, where one gibberellin‐signalling‐repressed DELLA gene showed distinct selection signatures in the cultivars. This study provides insights into the genetic architecture and breeding history of fibre yield traits in ramie. Moreover, the identification of fibre yield‐related genetic loci and large‐scale genomic variation represent valuable resources for genomics‐assisted breeding of this crop.