Title |
The abundance of homoeologue transcripts is disrupted by hybridization and is partially restored by genome doubling in synthetic hexaploid wheat
|
---|---|
Published in |
BMC Genomics, February 2017
|
DOI | 10.1186/s12864-017-3558-0 |
Pubmed ID | |
Authors |
Ming Hao, Aili Li, Tongwei Shi, Jiangtao Luo, Lianquan Zhang, Xuechuan Zhang, Shunzong Ning, Zhongwei Yuan, Deying Zeng, Xingchen Kong, Xiaolong Li, Hongkun Zheng, Xiujin Lan, Huaigang Zhang, Youliang Zheng, Long Mao, Dengcai Liu |
Abstract |
The formation of an allopolyploid is a two step process, comprising an initial wide hybridization event, which is later followed by a whole genome doubling. Both processes can affect the transcription of homoeologues. Here, RNA-Seq was used to obtain the genome-wide leaf transcriptome of two independent Triticum turgidum × Aegilops tauschii allotriploids (F1), along with their spontaneous allohexaploids (S1) and their parental lines. The resulting sequence data were then used to characterize variation in homoeologue transcript abundance. The hybridization event strongly down-regulated D-subgenome homoeologues, but this effect was in many cases reversed by whole genome doubling. The suppression of D-subgenome homoeologue transcription resulted in a marked frequency of parental transcription level dominance, especially with respect to genes encoding proteins involved in photosynthesis. Singletons (genes where no homoeologues were present) were frequently transcribed at both the allotriploid and allohexaploid plants. The implication is that whole genome doubling helps to overcome the phenotypic weakness of the allotriploid, restoring a more favourable gene dosage in genes experiencing transcription level dominance in hexaploid wheat. |
X Demographics
Geographical breakdown
Country | Count | As % |
---|---|---|
United States | 1 | 33% |
Unknown | 2 | 67% |
Demographic breakdown
Type | Count | As % |
---|---|---|
Members of the public | 3 | 100% |
Mendeley readers
Geographical breakdown
Country | Count | As % |
---|---|---|
China | 1 | 5% |
Unknown | 21 | 95% |
Demographic breakdown
Readers by professional status | Count | As % |
---|---|---|
Student > Ph. D. Student | 6 | 27% |
Researcher | 4 | 18% |
Student > Doctoral Student | 3 | 14% |
Student > Master | 3 | 14% |
Student > Bachelor | 2 | 9% |
Other | 1 | 5% |
Unknown | 3 | 14% |
Readers by discipline | Count | As % |
---|---|---|
Agricultural and Biological Sciences | 10 | 45% |
Biochemistry, Genetics and Molecular Biology | 6 | 27% |
Business, Management and Accounting | 1 | 5% |
Medicine and Dentistry | 1 | 5% |
Unknown | 4 | 18% |