Chinese Bulletin of Botany ›› 2021, Vol. 56 ›› Issue (2): 166-174.DOI: 10.11983/CBB20191

• EXPERIMENTAL COMMUNICATIONS • Previous Articles     Next Articles

Heterosis Analysis of the Fiber Quality in Gossypium hirsutum Germplasm Jizi139 with FBP7::iaaM

Baosheng Guo, Su’en Liu, Cunpeng Zhao, Zhaoxiao Wang, Kaihui Wang, Dan Li, Xu Liu, Haiying Du, Junyi Geng()   

  1. Institute of Cotton, Hebei Academy of Agriculture and Forestry Sciences/Key Laboratory of Biology and Genetic Improvement of Cotton in Huanghuaihai Semiarid Area, Ministry of Agriculture and Rural Affairs/Hebei Branch of National Cotton Improvement Center, Shijiazhuang 050051, China
  • Received:2020-11-26 Accepted:2021-03-01 Online:2021-03-01 Published:2021-03-17
  • Contact: Junyi Geng

Abstract: The improvement of cotton yield and fiber quality has become an important goal of cotton breeding, and the innovation of elite germplasm is the basis of variety improvement. The FBP7::iaaM could promote the cotton fiber initiation by regulating the content of IAA in ovule epidermis. Using the transgenic line of IF1-1 (FBP7::iaaM) as the parent, we have transferred the target gene to backbone parents and developed an excellent upland cotton germplasm Jizi139 by conventional cross breeding, and analyzed the heterosis of fiber quality traits of Jizi139 by crossing with four different types of upland cotton lines. Our results showed that FBP7::iaaM gene and the fine traits regulated by FBP7::iaaM can be transferred to breeding backbone parents with high breeding value. Jizi139 with FBP7::iaaM showed high lint percentage, high fiber quality and excellent comprehensive characteristics. Also, it was found that additive effect was the genetic basis of the fiber length, fiber strength and micronaire, which provided a theoretical basis for the selection and application of parents.

Key words: upland cotton, fiber quality, FBP7::iaaM, heterosis