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Int. J. Mol. Sci. 2015, 16(9), 22938-22956;

Phenotypic and Transcriptomic Analyses of Autotetraploid and Diploid Mulberry (Morus alba L.)

Sericultural & Agri-Food Research Institute Guangdong Academy of Agricultural Sciences, 133 Yiheng Road, Dongguan Village, Tianhe District, Guangzhou 510610, Guangdong, China
Author to whom correspondence should be addressed.
Academic Editor: Marcello Iriti
Received: 28 July 2015 / Revised: 14 September 2015 / Accepted: 15 September 2015 / Published: 22 September 2015
(This article belongs to the Special Issue Plant Molecular Biology)
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Autopolyploid plants and their organs are often larger than their diploid counterparts, which makes them attractive to plant breeders. Mulberry (Morus alba L.) is an important commercial woody plant in many tropical and subtropical areas. In this study, we obtained a series of autotetraploid mulberry plants resulting from a colchicine treatment. To evaluate the effects of genome duplications in mulberry, we compared the phenotypes and transcriptomes of autotetraploid and diploid mulberry trees. In the autotetraploids, the height, breast-height diameter, leaf size, and fruit size were larger than those of diploids. Transcriptome data revealed that of 21,229 expressed genes only 609 (2.87%) were differentially expressed between diploids and autotetraploids. Among them, 30 genes were associated with the biosynthesis and signal transduction of plant hormones, including cytokinin, gibberellins, ethylene, and auxin. In addition, 41 differentially expressed genes were involved in photosynthesis. These results enhance our understanding of the variations that occur in mulberry autotetraploids and will benefit future breeding work. View Full-Text
Keywords: mulberry; autotetraploid; phenotype; transcriptome; plant hormone mulberry; autotetraploid; phenotype; transcriptome; plant hormone

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Dai, F.; Wang, Z.; Luo, G.; Tang, C. Phenotypic and Transcriptomic Analyses of Autotetraploid and Diploid Mulberry (Morus alba L.). Int. J. Mol. Sci. 2015, 16, 22938-22956.

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