Journal
PLANT BIOTECHNOLOGY JOURNAL
Volume 17, Issue 2, Pages 451-460Publisher
WILEY
DOI: 10.1111/pbi.12989
Keywords
Populus alba; Populus bolleana; comparative genomics; transformation efficiency; gene families
Funding
- National Key Research and Development Program of China [2016YFD0600101]
- National High-Tech Research and Development Program of China [2013AA102605]
- National Science Foundation of China [31561123001, 31470620, 31500502]
- '111' collaboration project
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Populus alba is widely distributed and cultivated in Europe and Asia. This species has been used for diverse studies. In this study, we assembled a de novo genome sequence of P. alba var. pyramidalis (= P. bolleana) and confirmed its high transformation efficiency and short transformation time by experiments. Through a process of hybrid genome assembly, a total of 464 M of the genome was assembled. Annotation analyses predicted 37 901 protein-coding genes. This genome is highly collinear to that of P. trichocarpa, with most genes having orthologs in the two species. We found a marked expansion of gene families related to histone and the hormone auxin but loss of disease resistance genes in P. alba if compared with the closely related P. trichocarpa. The genome sequence presented here represents a valuable resource for further molecular functional analyses of this species as a new tree model, poplar breeding practices and comparative genomic analyses across different poplars.
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