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GWAS combined with QTL mapping reveals the genetic loci of leaf morphological characters in Nicotiana tabacum.
Ji, Yan; Liu, Guoxiang; Yan, Sifan; Jiang, Xun; Wu, Mengting; Liu, Wei; Li, Yuan; Yang, Aiguo; Dai, Peigang; Du, Shuaibin; Li, Yangyang; Wang, Jun; Zhang, Xingwei.
Afiliación
  • Ji Y; Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Qingdao, CN-266000, China.
  • Liu G; Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Qingdao, CN-266000, China.
  • Yan S; Ruijin Branch, Jiangxi Ganzhou Tobacco Company of China Tobacco Corporation, Ganzhou, CN-341000, China.
  • Jiang X; Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Qingdao, CN-266000, China.
  • Wu M; Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Qingdao, CN-266000, China.
  • Liu W; Key Laboratory of Bio-resource and Eco-environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, CN-610065, China.
  • Li Y; Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Qingdao, CN-266000, China.
  • Yang A; Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Qingdao, CN-266000, China.
  • Dai P; Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Qingdao, CN-266000, China.
  • Du S; Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Qingdao, CN-266000, China.
  • Li Y; Hunan Tobacco Research Institute, Changsha, 410004, Hunan, China. shen-ly@163.com.
  • Wang J; Deyang Company of Sichuan Provincial Tobacco Corporation, Deyang, CN-618400, China. 599187325@qq.com.
  • Zhang X; Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Qingdao, CN-266000, China. zhangxingwei@caas.cn.
BMC Plant Biol ; 24(1): 583, 2024 Jun 20.
Article en En | MEDLINE | ID: mdl-38898384
ABSTRACT

BACKGROUND:

Leaf morphology plays a crucial role in photosynthetic efficiency and yield potential in crops. Cigar tobacco plants, which are derived from common tobacco (Nicotiana tabacum L.), possess special leaf characteristics including thin and delicate leaves with few visible veins, making it a good system for studying the genetic basis of leaf morphological characters.

RESULTS:

In this study, GWAS and QTL mapping were simultaneously performed using a natural population containing 185 accessions collected worldwide and an F2 population consisting of 240 individuals, respectively. A total of 26 QTLs related to leaf morphological traits were mapped in the F2 population at three different developmental stages, and some QTL intervals were repeatedly detected for different traits and at different developmental stages. Among the 206 significant SNPs identified in the natural population using GWAS, several associated with the leaf thickness phenotype were co-mapped via QTL mapping. By analyzing linkage disequilibrium and transcriptome data from different tissues combined with gene functional annotations, 7 candidate genes from the co-mapped region were identified as the potential causative genes associated with leaf thickness.

CONCLUSIONS:

These results presented a valuable cigar tobacco resource showing the genetic diversity regarding its leaf morphological traits at different developmental stages. It also provides valuable information for novel genes and molecular markers that will be useful for further functional verification and for molecular breeding of leaf morphological traits in crops in the future.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Nicotiana / Mapeo Cromosómico / Hojas de la Planta / Sitios de Carácter Cuantitativo / Estudio de Asociación del Genoma Completo Idioma: En Revista: BMC Plant Biol Asunto de la revista: BOTANICA Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Reino Unido
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Nicotiana / Mapeo Cromosómico / Hojas de la Planta / Sitios de Carácter Cuantitativo / Estudio de Asociación del Genoma Completo Idioma: En Revista: BMC Plant Biol Asunto de la revista: BOTANICA Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Reino Unido