TITLE

Gene Expression Differences between High-Growth Populus Allotriploids and Their Diploid Parents

AUTHOR(S)
Shiping Cheng; Xiaohu Zhu; Ting Liao; Yun Li; Pengqiang Yao; Yujing Suo; Pingdong Zhang; Jun Wang; Xiangyang Kang
PUB. DATE
March 2015
SOURCE
Forests (19994907);2015, Vol. 6 Issue 3, p839
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Polyploid breeding is important in Populus genetic improvement programs because polyploid trees generally display increased height growth compared to their diploid parents. However, the genetic mechanism underlying this phenomenon remains unknown. In the present study, apical bud transcriptomes of vigorous, fast growing Populus allotriploid progeny genotypes and their diploid parents were sequenced and analyzed. We found that these allotriploids exhibited extensive transcriptomic diversity. In total, 6020 differentially expressed genes (DEGs) were found when the allotriploid progeny and their parents were compared, among which 791 overlapped between the allotriploids and both parents. Many genes associated with cell differentiation and meristem development were preferentially expressed in apical buds of the fast growing Populus allotriploids compared to their diploid parents. In addition, many auxin-, gibberellin-, and jasmonic acid-related genes were also preferentially expressed in the allotriploids compared to their parents. Our findings show that allotriploidy can have considerable effects on duplicate gene expression in Populus. In particular we identified and considered DEGs that provide important clues for improving our mechanistic understanding of positive heterosis of vigor- and growth-related traits in Populus allotriploids.
ACCESSION #
101794863

 

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