The chalcone isomerase family in cotton: Whole-genome bioinformatic and expression analyses of the Gossypium barbadense L. response to fusarium wilt infection

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Abstract

Chalcone isomerase (CHI) is a key component of phenylalanine metabolism that can produce a variety of flavonoids. However, little information and no systematic analysis of CHI genes is available for cotton. Here, we identified 33 CHI genes in the complete genome sequences of four cotton species (Gossypium arboretum L., Gossypium raimondii L., Gossypium hirsutum L., and Gossypium barbadense L.). Cotton CHI proteins were classified into two main groups, and whole-genome/segmental and dispersed duplication events were important in CHI gene family expansion. qRT-PCR and semiquantitative RT-PCR results suggest that CHI genes exhibit temporal and spatial variation and respond to infection with Fusarium wilt race 7. A preliminary model of CHI gene involvement in cotton evolution was established. Pairwise comparison revealed that seven CHI genes showed higher expression in cultivar 06-146 than in cultivar Xinhai 14. Overall, this whole-genome identification unlocks a new approach to the comprehensive functional analysis of the CHI gene family, which may be involved in adaptation to plant pathogen stress.

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Zu, Q. L., Qu, Y. Y., Ni, Z. Y., Zheng, K., Chen, Q., & Chen, Q. J. (2019). The chalcone isomerase family in cotton: Whole-genome bioinformatic and expression analyses of the Gossypium barbadense L. response to fusarium wilt infection. Genes, 10(12). https://doi.org/10.3390/genes10121006

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