Year-end Sale % OFF 
Abstract
Heat shock transcription factors (HSFs) are involved in environmental stress response and plant development, such as heat stress and flowering development. According to the structural characteristics of the HSF gene family, HSF genes were classified into three major types (HSFA, HSFB, and HSFC) in plants. Using conserved domains of HSF genes, we identified 621 HSF genes among 13 cotton genomes, consisting of eight diploid and five tetraploid genomes. Phylogenetic analysis indicated that HSF genes among 13 cotton genomes were grouped into two different clusters: one cluster contained all HSF genes of HSFA and HSFC, and the other cluster contained all HSF genes of HSFB. Comparative analysis of HSF genes in Arabidopsis thaliana, Gossypium herbaceum (A1), Gossypium arboreum (A2), Gossypium raimondii (D5), and Gossypium hirsutum (AD1) genomes demonstrated that four HSF genes were inherited from a common ancestor, A0, of all existing cotton A genomes. Members of the HSF gene family in G. herbaceum (A1) genome indicated a significant loss compared with those in G. arboretum (A2) and G. hirsutum (AD1) A genomes. However, HSF genes in G. raimondii (D5) showed relative loss compared with those in G. hirsutum (AD1) D genome. Analysis of tandem duplication (TD) events of HSF genes revealed that protein-coding genes among different cotton genomes have experienced TD events, but only the two-gene tandem array was detected in Gossypium thurberi (D1) genome. The expression analysis of HSF genes in G. hirsutum (AD1) and Gossypium barbadense (AD2) genomes indicated that the expressed HSF genes were divided into two different groups, respectively, and the expressed HSF orthologous genes between the two genomes showed totally different expression patterns despite the implementation of the same abiotic stresses. This work will provide novel insights for the study of evolutionary history and expression characterization of HSF genes in different cotton genomes and a widespread application model for the study of HSF gene families in plants.
Highlights
Cotton is one of the most important economic crops worldwide, which provides the major resource of natural fiber for human beings over the past decades
According to the conserved domains of heat shock transcription factor (HSF) gene family in plants, we identified 621 HSF genes among 13 genomesequenced cotton species distributed into eight diploid and five tetraploid species
Comparative genomics analysis demonstrated that members of the HSF gene family in cotton diploid genome showed a significant expansion in G. thurberi (D1), G. raimondii (D5), G. turneri (D10), G. longicalyx (F1), G. australe (G2), and G. kirkii (K) compared with those in G. herbaceum (A1) and G. arboreum (A2)
Summary
Cotton (genus Gossypium) is one of the most important economic crops worldwide, which provides the major resource of natural fiber for human beings over the past decades. To facilitate the genetic breeding and crop improvement of cotton, various cotton genomes were released for the community, such as eight diploid genomes: Gossypium herbaceum (A1) (Huang et al, 2020), Gossypium arboreum (A2) (Li et al, 2014), Gossypium thurberi (D1) (Grover et al, 2019), Gossypium raimondii (D5) (Wang K. et al, 2012), Gossypium turneri (D10) (Udall et al, 2019a), Gossypium longicalyx (F1) (Grover et al, 2020), Gossypium australe (G2) (Cai et al, 2020), and Gossypioides kirkii (K) (Udall et al, 2019b), and five tetraploid genomes: Gossypium hirsutum (AD1) (Li et al, 2015), Gossypium barbadense (AD2) (Liu et al, 2015), Gossypium tomentosum (AD3) (Chen et al, 2020), Gossypium mustelinum (AD4) (Chen et al, 2020), and Gossypium darwinii (AD5) (Chen et al, 2020). Less than 1 Mya (∼0.7 Mya), the ancestor of cotton A1 and A2 genome species experienced divergence and generated cotton diploid species, G. herbaceum (A1) and G. arboreum (A2) (Huang et al, 2020). Previous reports mentioned that a TD event is a critical mechanism in plants which brings an increase in the number of gene copies leading to the expansion of the gene family (Graham, 1995)
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
