Comparison of leaf transcriptomes of cassava "Xinxuan 048" diploid and autotetraploid plants

Genes & Genomics
Ling YinHuabing Yan

Abstract

Polyploidy breeding of cassava has been used to improve cassava traits over the past years. We previously reported in vitro induction of tetraploids in the cassava variety "Xinxuan 048" using colchicine. Significant differences in morphology and anatomy were found between the diploid and tetraploid plants. However, very little is known about the transcriptome difference between them. In this study, morphological and physiological characteristics including leaf thickness, plant height, internode length, chlorophyll content, and photosynthetic capacity were measured. Further, we investigated and validated the difference in gene expression patterns between cassava "Xinxuan 048" tetraploid genotype and its diploid plants using RNA sequencing (RNAseq) and quantitative reverse transcription-polymerase chain reaction (qRT-PCR). Significant differences in morphology and physiology were observed during tetraploidization. A comparison revealed that tetraploidy induced very limited changes in the leaf transcriptomes of cassava "Xinxuan 048" diploid and autotetraploid plants. However, the differentially expressed genes (DEGs) between 2× and 4× plants, especially those upregulated in 4× plants, were strongly associated with hormonal and str...Continue Reading

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Citations

Apr 11, 2020·Frontiers in Plant Science·Sirlei Aparecida JuliãoLyderson Facio Viccini

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