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Journal article
Intra-Varietal Diversity and Its Contribution to Wheat Evolution, Domestication, and Improvement in Wheat
International journal of molecular sciences, Vol.24(12), 10217
2023
Abstract
Crop genetic diversity is essential for adaptation and productivity in agriculture. A previous study revealed that poor allele diversity in wheat commercial cultivars is a major barrier to its further improvement. Homologs within a variety, including paralogs and orthologs in polyploid, account for a large part of the total genes of a species. Homolog diversity, intra-varietal diversity (IVD), and their functions have not been elucidated. Common wheat, an important food crop, is a hexaploid species with three subgenomes. This study analyzed the sequence, expression, and functional diversity of homologous genes in common wheat based on high-quality reference genomes of two representative varieties, a modern commercial variety Aikang 58 (AK58) and a landrace Chinese Spring (CS). A total of 85,908 homologous genes, accounting for 71.9% of all wheat genes, including inparalogs (IPs), outparalogs (OPs), and single-copy orthologs (SORs), were identified, suggesting that homologs are an important part of the wheat genome. The levels of sequence, expression, and functional variation in OPs and SORs were higher than that of IPs, which indicates that polyploids have more homologous diversity than diploids. Expansion genes, a specific type of OPs, made a great contribution to crop evolution and adaptation and endowed crop with special characteristics. Almost all agronomically important genes were from OPs and SORs, demonstrating their essential functions for polyploid evolution, domestication, and improvement. Our results suggest that IVD analysis is a novel approach for evaluating intra-genomic variations, and exploitation of IVD might be a new road for plant breeding, especially for polyploid crops, such as wheat.
Details
- Title
- Intra-Varietal Diversity and Its Contribution to Wheat Evolution, Domestication, and Improvement in Wheat
- Authors/Creators
- Tianbao Li - Henan Agricultural UniversityChuizheng Kong - Institute of Crop SciencesPingchuan Deng - Northwest A&F UniversityChengdao Li - Murdoch UniversityGuangyao Zhao - Institute of Crop SciencesHongjie Li - Institute of Crop SciencesLifeng Gao - Institute of Crop SciencesDangqun Cui - Henan Agricultural UniversityJizeng Jia - Henan Agricultural University
- Publication Details
- International journal of molecular sciences, Vol.24(12), 10217
- Publisher
- MDPI
- Grant note
- 31991213 / National Natural Science Foundation of China Y2021YJ01 / Central Public-interest Scientific Institution Basal Research Fund 31971882 / National Natural Science Foundation of China
- Identifiers
- 991005586942207891
- Copyright
- © 2023 by the authors
- Murdoch Affiliation
- Centre for Crop and Food Innovation
- Language
- English
- Resource Type
- Journal article
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- Collaboration types
- Domestic collaboration
- International collaboration
- Citation topics
- 3 Agriculture, Environment & Ecology
- 3.4 Crop Science
- 3.4.96 QTL
- Web Of Science research areas
- Biochemistry & Molecular Biology
- Chemistry, Multidisciplinary
- ESI research areas
- Chemistry