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Genome and GWAS analysis identified genes significantly related to phenotypic state of Rhododendron bark

文献类型： 外文期刊

作者： Ye, Qiannan 1 ; Zhang, Lu 3 ; Li, Qing 1 ; Ji, Yaliang 4 ; Zhou, Yanli 1 ; Wu, Zhenzhen 1 ; Hu, Yanting 1 ; Ma, Yongpeng 5 ; Wang, Jihua 3 ; Zhang, Chengjun 1 ;

作者机构： 1.Chinese Acad Sci, Kunming Inst Bot, Yunnan Key Lab Crop Wild Relat Omics, Germplasm Bank Wild Species, Kunming 650201, Yunnan, Peoples R China

2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China

3.Yunnan Acad Agr Sci, Natl Engn Res Ctr Ornamental Hort, Flower Res Inst, Kunming 650000, Peoples R China

4.Nanjing Tech Univ, Coll Biotechnol & Pharmaceut Engn, State Key Lab Mat Oriented Chem Engn, Nanjing 211800, Peoples R China

5.Chinese Acad Sci, Kunming Inst Bot, Yunnan Key Lab Integrat Conservat Plant Species Ex, Kunming 650201, Peoples R China

6.Zhejiang Inst Adv Technol, Haiyan Engn & Technol Ctr, Jiaxing 314022, Peoples R China

7.Zhejiang A&F Univ, State Key Lab Subtrop Silviculture, Hangzhou 311300, Peoples R China

期刊名称：HORTICULTURE RESEARCH （ 影响因子：8.7； 五年影响因子：9.0 ）

ISSN： 2662-6810

年卷期： 2024 年 11 卷 3 期

页码：

收录情况： SCI

摘要： As an important horticultural plant, Rhododendron is often used in urban greening and landscape design. However, factors such as the high rate of genetic recombination, frequent outcrossing in the wild, weak linkage disequilibrium, and the susceptibility of gene expression to environmental factors limit further exploration of functional genes related to important horticultural traits, and make the breeding of new varieties require a longer time. Therefore, we choose bark as the target trait which is not easily affected by environmental factors, but also has ornamental properties. Genome-wide association study (GWAS) of Rhododendron delavayi (30 samples), R. irroratum (30 samples) and their F1 generation R. agastum (200 samples) was conducted on the roughness of bark phenotypes. Finally, we obtained 2416.31 Gbp of clean data and identified 5 328 800 high-quality SNPs. According to the P-value and the degree of linkage disequilibrium of SNPs, we further identified 4 out of 11 candidate genes that affect bark roughness. The results of gene differential expression analysis further indicated that the expression levels of Rhdel02G0243600 and Rhdel08G0220700 in different bark phenotypes were significantly different. Our study identified functional genes that influence important horticultural traits of Rhododendron, and illustrated the powerful utility and great potential of GWAS in understanding and exploiting wild germplasm genetic resources of Rhododendron.

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