AUTHOR=Li Ziyin , Shi Yuzhen , Xiao Xianghui , Song Jikun , Li Pengtao , Gong Juwu , Zhang Haibo , Gong Wankui , Liu Aiying , Peng Renhai , Shang Haihong , Ge Qun , Li Junwen , Pan Jingtao , Chen Quanjia , Lu Quanwei , Yuan Youlu 

TITLE=Genome-wide characterization of trichome birefringence-like genes provides insights into fiber yield improvement

JOURNAL=Frontiers in Plant Science

VOLUME=Volume 14 - 2023

YEAR=2023

URL=https://www.frontiersin.org/journals/plant-science/articles/10.3389/fpls.2023.1127760

DOI=10.3389/fpls.2023.1127760

ISSN=1664-462X

ABSTRACT=Cotton is the most important fiber crop. Cotton fiber is an extremely long trichome developed from epidermis of ovule. Trichome is a general and multi-function plant organ, Trichome Birefringence-Like genes (TBL) are related to trichome development. In genome-wide scale, we identified TBLs in four cotton species containing two cultivated tetraploids (G. hirsutum and G. barbadense) and two ancestral diploids (G. Arboreum and G. raimondii). Phylogenetic analysis showed that TBL genes were clustered into six groups. The GH_D02G1759 in group IV is focused because it was located in a lint percentage-related QTL. Furtherly, transcriptome profiling characterized the role of TBLs in group IV in fiber development. The over-expression of GH_D02G1759 in Arabidopsis thaliana had more trichomes on the stems proved its function during fiber development. Moreover, the potential interaction network was constructed based on co-expression network. GH_D02G1759 may interact with several genes to regulate fiber development. These foundings will enlarge the knowledge about TBL family members and provide new insights on cotton molecular breeding.