The genome sequence of Sea-Island cotton (Gossypium barbadense) provides insights into the allopolyploidization and development of superior spinnable fibres.
作者： Daojun Yuan , Zhonghui Tang , Maojun Wang , Wenhui Gao , Lili Tu
DOI: 10.1038/SREP17662
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摘要: Gossypium hirsutum contributes the most production of cotton fibre, but G. barbadense is valued for its better comprehensive resistance and superior fibre properties. However, allotetraploid genome has not been comprehensively analysed. Here we present a high-quality assembly 2.57 gigabase barbadense, including 80,876 protein-coding genes. The double-sized A (or At) (1.50 Gb) against D Dt) (853 Mb) primarily resulted from expansion Gypsy elements, Peabody Retrosat2 subclades in Del clade, Athila subclade Athila/Tat clade. Substantial gene contraction were observed rich homoeologous pairs with biased expression patterns identified, suggesting abundant sub-functionalization occurred by allopolyploidization. More specifically, CesA family adapted differentially temporal patterns, an integrated regulatory mechanism genes At Dt subgenomes primary secondary cellulose biosynthesis "relay race"-like fashion. We anticipate that sequence will advance our understanding polyploidization underpin genome-wide comparison research this genus.
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